/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loop-invgen/large_const.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:39:06,588 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:39:06,594 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:39:06,650 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:39:06,651 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:39:06,658 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:39:06,660 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:39:06,665 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:39:06,668 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:39:06,674 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:39:06,676 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:39:06,677 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:39:06,678 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:39:06,681 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:39:06,684 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:39:06,687 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:39:06,688 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:39:06,692 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:39:06,712 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:39:06,718 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:39:06,725 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:39:06,727 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:39:06,729 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:39:06,730 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:39:06,737 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:39:06,738 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:39:06,738 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:39:06,741 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:39:06,742 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:39:06,743 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:39:06,744 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:39:06,744 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:39:06,747 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:39:06,748 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:39:06,749 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:39:06,749 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:39:06,750 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:39:06,750 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:39:06,751 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:39:06,752 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:39:06,752 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:39:06,760 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 01:39:06,813 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:39:06,813 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:39:06,818 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:39:06,819 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:39:06,819 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:39:06,819 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:39:06,819 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:39:06,820 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:39:06,820 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:39:06,820 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:39:06,821 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:39:06,822 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:39:06,822 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:39:06,822 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:39:06,822 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:39:06,822 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:39:06,823 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:39:06,823 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:39:06,823 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:39:06,823 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:39:06,824 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:39:06,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:39:06,824 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:39:06,824 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:39:06,825 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:39:06,825 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:39:06,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:39:06,825 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:39:06,825 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:39:06,826 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:39:07,253 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:39:07,280 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:39:07,283 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:39:07,284 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:39:07,285 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:39:07,286 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/large_const.i [2020-10-27 01:39:07,373 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aed535169/0b50bf183ff146ee958bb8bd2d099bda/FLAGd1144b09b [2020-10-27 01:39:08,007 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:39:08,008 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/large_const.i [2020-10-27 01:39:08,018 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aed535169/0b50bf183ff146ee958bb8bd2d099bda/FLAGd1144b09b [2020-10-27 01:39:08,370 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aed535169/0b50bf183ff146ee958bb8bd2d099bda [2020-10-27 01:39:08,373 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:39:08,381 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:39:08,385 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:39:08,385 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:39:08,389 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:39:08,390 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:39:08" (1/1) ... [2020-10-27 01:39:08,394 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a85eb7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:39:08, skipping insertion in model container [2020-10-27 01:39:08,395 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:39:08" (1/1) ... [2020-10-27 01:39:08,403 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:39:08,423 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:39:08,590 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:39:08,600 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:39:08,619 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:39:08,636 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:39:08,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:39:08 WrapperNode [2020-10-27 01:39:08,637 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:39:08,638 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:39:08,638 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:39:08,639 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:39:08,653 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:39:08" (1/1) ... [2020-10-27 01:39:08,654 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:39:08" (1/1) ... [2020-10-27 01:39:08,662 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:39:08" (1/1) ... [2020-10-27 01:39:08,663 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:39:08" (1/1) ... [2020-10-27 01:39:08,670 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:39:08" (1/1) ... [2020-10-27 01:39:08,676 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:39:08" (1/1) ... [2020-10-27 01:39:08,677 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:39:08" (1/1) ... [2020-10-27 01:39:08,680 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:39:08,681 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:39:08,682 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:39:08,682 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:39:08,683 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:39:08" (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 01:39:08,767 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:39:08,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:39:08,768 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:39:08,768 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 01:39:08,768 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 01:39:08,769 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:39:08,769 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:39:08,769 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:39:08,769 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 01:39:08,770 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 01:39:08,770 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:39:08,770 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:39:08,770 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 01:39:08,770 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 01:39:08,771 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 01:39:08,771 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:39:08,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:39:08,771 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:39:08,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:39:08,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:39:08,772 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:39:08,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:39:09,253 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:39:09,253 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-27 01:39:09,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:39:09 BoogieIcfgContainer [2020-10-27 01:39:09,256 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:39:09,260 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:39:09,260 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:39:09,264 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:39:09,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:39:08" (1/3) ... [2020-10-27 01:39:09,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30aeec8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:39:09, skipping insertion in model container [2020-10-27 01:39:09,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:39:08" (2/3) ... [2020-10-27 01:39:09,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30aeec8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:39:09, skipping insertion in model container [2020-10-27 01:39:09,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:39:09" (3/3) ... [2020-10-27 01:39:09,270 INFO L111 eAbstractionObserver]: Analyzing ICFG large_const.i [2020-10-27 01:39:09,285 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:39:09,295 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:39:09,312 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:39:09,357 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:39:09,357 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:39:09,357 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:39:09,358 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:39:09,358 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:39:09,358 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:39:09,358 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:39:09,358 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:39:09,383 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-10-27 01:39:09,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 01:39:09,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:39:09,393 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:39:09,393 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:39:09,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:39:09,403 INFO L82 PathProgramCache]: Analyzing trace with hash -163533008, now seen corresponding path program 1 times [2020-10-27 01:39:09,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:39:09,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1154133978] [2020-10-27 01:39:09,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:39:09,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:09,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:09,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:09,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 01:39:09,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:09,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 304 [2020-10-27 01:39:09,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:09,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:39:09,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:39:09,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 01:39:09,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:39:10,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:39:10,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:10,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:10,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:10,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:39:10,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:10,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 01:39:10,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:10,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:39:10,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:10,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:39:10,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:10,067 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 01:39:10,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1154133978] [2020-10-27 01:39:10,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:39:10,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:39:10,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110163465] [2020-10-27 01:39:10,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:39:10,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:39:10,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:39:10,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:39:10,095 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 6 states. [2020-10-27 01:39:10,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:39:10,392 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2020-10-27 01:39:10,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:39:10,394 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-27 01:39:10,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:39:10,414 INFO L225 Difference]: With dead ends: 56 [2020-10-27 01:39:10,414 INFO L226 Difference]: Without dead ends: 24 [2020-10-27 01:39:10,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:39:10,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-27 01:39:10,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-27 01:39:10,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-27 01:39:10,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-10-27 01:39:10,524 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 16 [2020-10-27 01:39:10,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:39:10,525 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-10-27 01:39:10,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:39:10,525 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-10-27 01:39:10,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 01:39:10,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:39:10,529 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:39:10,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:39:10,530 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:39:10,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:39:10,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1958743745, now seen corresponding path program 1 times [2020-10-27 01:39:10,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:39:10,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1723065692] [2020-10-27 01:39:10,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:39:10,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:10,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:10,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:10,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 01:39:10,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:10,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 184 [2020-10-27 01:39:10,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:10,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:39:10,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:39:10,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 01:39:10,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:10,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:39:10,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:10,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:10,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:10,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:39:10,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:10,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 01:39:10,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:10,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:39:10,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:10,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:39:10,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 01:39:10,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:39:10,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1723065692] [2020-10-27 01:39:10,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:39:10,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:39:10,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302003324] [2020-10-27 01:39:10,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:39:10,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:39:10,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:39:10,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:39:10,973 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 8 states. [2020-10-27 01:39:11,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:39:11,431 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2020-10-27 01:39:11,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:39:11,432 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-27 01:39:11,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:39:11,435 INFO L225 Difference]: With dead ends: 46 [2020-10-27 01:39:11,435 INFO L226 Difference]: Without dead ends: 42 [2020-10-27 01:39:11,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:39:11,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-27 01:39:11,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2020-10-27 01:39:11,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-27 01:39:11,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-10-27 01:39:11,451 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 19 [2020-10-27 01:39:11,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:39:11,452 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-10-27 01:39:11,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:39:11,452 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-10-27 01:39:11,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 01:39:11,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:39:11,453 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] [2020-10-27 01:39:11,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:39:11,454 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:39:11,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:39:11,454 INFO L82 PathProgramCache]: Analyzing trace with hash -175634455, now seen corresponding path program 1 times [2020-10-27 01:39:11,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:39:11,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415658572] [2020-10-27 01:39:11,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:39:11,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:11,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:11,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:11,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 01:39:11,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:11,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 156 [2020-10-27 01:39:11,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:11,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:39:11,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:39:11,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:39:11,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:11,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:39:11,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:11,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:11,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:11,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:39:11,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:11,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 01:39:11,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:11,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:39:11,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:11,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:39:11,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:11,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:39:11,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415658572] [2020-10-27 01:39:11,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:39:11,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:39:11,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810608881] [2020-10-27 01:39:11,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:39:11,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:39:11,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:39:11,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:39:11,723 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 8 states. [2020-10-27 01:39:12,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:39:12,114 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2020-10-27 01:39:12,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:39:12,115 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-27 01:39:12,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:39:12,118 INFO L225 Difference]: With dead ends: 56 [2020-10-27 01:39:12,118 INFO L226 Difference]: Without dead ends: 52 [2020-10-27 01:39:12,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:39:12,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-27 01:39:12,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-10-27 01:39:12,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 01:39:12,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2020-10-27 01:39:12,130 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 20 [2020-10-27 01:39:12,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:39:12,130 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2020-10-27 01:39:12,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:39:12,130 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2020-10-27 01:39:12,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 01:39:12,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:39:12,131 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] [2020-10-27 01:39:12,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:39:12,132 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:39:12,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:39:12,133 INFO L82 PathProgramCache]: Analyzing trace with hash -568661465, now seen corresponding path program 1 times [2020-10-27 01:39:12,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:39:12,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1979166155] [2020-10-27 01:39:12,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:39:12,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:12,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:12,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:12,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 01:39:12,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:12,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-10-27 01:39:12,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:12,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:39:12,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:39:12,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:39:12,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:39:12,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:39:12,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:12,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:12,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:12,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:39:12,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:12,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:39:12,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:12,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:39:12,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:12,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:39:12,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:12,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:39:12,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1979166155] [2020-10-27 01:39:12,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:39:12,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:39:12,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141670114] [2020-10-27 01:39:12,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:39:12,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:39:12,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:39:12,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:39:12,463 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand 8 states. [2020-10-27 01:39:12,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:39:12,909 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2020-10-27 01:39:12,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:39:12,910 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-27 01:39:12,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:39:12,911 INFO L225 Difference]: With dead ends: 60 [2020-10-27 01:39:12,911 INFO L226 Difference]: Without dead ends: 56 [2020-10-27 01:39:12,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:39:12,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-27 01:39:12,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 45. [2020-10-27 01:39:12,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-27 01:39:12,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 58 transitions. [2020-10-27 01:39:12,926 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 58 transitions. Word has length 20 [2020-10-27 01:39:12,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:39:12,926 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 58 transitions. [2020-10-27 01:39:12,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:39:12,927 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 58 transitions. [2020-10-27 01:39:12,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 01:39:12,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:39:12,928 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:39:12,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:39:12,928 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:39:12,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:39:12,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1597716218, now seen corresponding path program 1 times [2020-10-27 01:39:12,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:39:12,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [304255731] [2020-10-27 01:39:12,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:39:12,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:12,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:12,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:12,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:13,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:13,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 01:39:13,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:39:13,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 447 [2020-10-27 01:39:13,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:13,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:39:13,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:39:13,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:39:13,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:39:13,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:39:13,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:13,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:13,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:13,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:39:13,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:13,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:39:13,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:13,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:39:13,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:13,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:39:13,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:13,518 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:39:13,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [304255731] [2020-10-27 01:39:13,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:39:13,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:39:13,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282001044] [2020-10-27 01:39:13,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:39:13,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:39:13,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:39:13,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:39:13,528 INFO L87 Difference]: Start difference. First operand 45 states and 58 transitions. Second operand 9 states. [2020-10-27 01:39:14,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:39:14,106 INFO L93 Difference]: Finished difference Result 78 states and 102 transitions. [2020-10-27 01:39:14,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:39:14,107 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-10-27 01:39:14,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:39:14,109 INFO L225 Difference]: With dead ends: 78 [2020-10-27 01:39:14,109 INFO L226 Difference]: Without dead ends: 74 [2020-10-27 01:39:14,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:39:14,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-27 01:39:14,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 55. [2020-10-27 01:39:14,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-27 01:39:14,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 75 transitions. [2020-10-27 01:39:14,135 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 75 transitions. Word has length 23 [2020-10-27 01:39:14,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:39:14,135 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 75 transitions. [2020-10-27 01:39:14,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:39:14,135 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 75 transitions. [2020-10-27 01:39:14,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 01:39:14,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:39:14,137 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:39:14,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:39:14,138 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:39:14,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:39:14,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1204689208, now seen corresponding path program 1 times [2020-10-27 01:39:14,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:39:14,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [997629746] [2020-10-27 01:39:14,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:39:14,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:14,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:14,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:14,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:14,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:14,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 01:39:14,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:39:14,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 508 [2020-10-27 01:39:14,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:14,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:39:14,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:39:14,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:39:14,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:14,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:39:14,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:14,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:14,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:14,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:39:14,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:14,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:39:14,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:14,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:39:14,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:14,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:39:14,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:14,791 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:39:14,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [997629746] [2020-10-27 01:39:14,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:39:14,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:39:14,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374920833] [2020-10-27 01:39:14,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:39:14,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:39:14,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:39:14,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:39:14,798 INFO L87 Difference]: Start difference. First operand 55 states and 75 transitions. Second operand 9 states. [2020-10-27 01:39:15,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:39:15,322 INFO L93 Difference]: Finished difference Result 86 states and 116 transitions. [2020-10-27 01:39:15,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:39:15,324 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-10-27 01:39:15,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:39:15,325 INFO L225 Difference]: With dead ends: 86 [2020-10-27 01:39:15,325 INFO L226 Difference]: Without dead ends: 82 [2020-10-27 01:39:15,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:39:15,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-27 01:39:15,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2020-10-27 01:39:15,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-27 01:39:15,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 89 transitions. [2020-10-27 01:39:15,367 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 89 transitions. Word has length 23 [2020-10-27 01:39:15,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:39:15,368 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 89 transitions. [2020-10-27 01:39:15,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:39:15,368 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 89 transitions. [2020-10-27 01:39:15,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 01:39:15,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:39:15,369 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:39:15,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:39:15,370 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:39:15,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:39:15,371 INFO L82 PathProgramCache]: Analyzing trace with hash -2073178264, now seen corresponding path program 2 times [2020-10-27 01:39:15,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:39:15,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479875874] [2020-10-27 01:39:15,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:39:15,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:15,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:15,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:15,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:15,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:15,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 01:39:15,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:39:15,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 476 [2020-10-27 01:39:15,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:15,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:39:15,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:39:15,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:39:15,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:15,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:39:15,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:15,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:15,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:15,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:39:15,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:15,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:39:15,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:15,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:39:15,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:15,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:39:15,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:15,960 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:39:15,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479875874] [2020-10-27 01:39:15,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:39:15,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:39:15,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244982019] [2020-10-27 01:39:15,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:39:15,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:39:15,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:39:15,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:39:15,963 INFO L87 Difference]: Start difference. First operand 63 states and 89 transitions. Second operand 9 states. [2020-10-27 01:39:16,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:39:16,491 INFO L93 Difference]: Finished difference Result 97 states and 135 transitions. [2020-10-27 01:39:16,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:39:16,492 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-10-27 01:39:16,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:39:16,493 INFO L225 Difference]: With dead ends: 97 [2020-10-27 01:39:16,493 INFO L226 Difference]: Without dead ends: 93 [2020-10-27 01:39:16,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:39:16,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-27 01:39:16,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2020-10-27 01:39:16,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-27 01:39:16,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 106 transitions. [2020-10-27 01:39:16,527 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 106 transitions. Word has length 23 [2020-10-27 01:39:16,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:39:16,530 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 106 transitions. [2020-10-27 01:39:16,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:39:16,530 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 106 transitions. [2020-10-27 01:39:16,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 01:39:16,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:39:16,531 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:39:16,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:39:16,532 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:39:16,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:39:16,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1634983018, now seen corresponding path program 2 times [2020-10-27 01:39:16,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:39:16,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [8097188] [2020-10-27 01:39:16,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:39:16,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:16,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:16,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:16,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:17,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:17,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 01:39:17,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:39:17,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 501 [2020-10-27 01:39:17,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:17,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:39:17,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:39:17,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:39:17,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:17,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:39:17,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:17,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:17,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:17,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:39:17,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:17,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:39:17,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:17,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:39:17,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:17,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:39:17,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 14 [2020-10-27 01:39:17,162 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:39:17,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [8097188] [2020-10-27 01:39:17,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:39:17,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:39:17,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13511132] [2020-10-27 01:39:17,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:39:17,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:39:17,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:39:17,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:39:17,169 INFO L87 Difference]: Start difference. First operand 73 states and 106 transitions. Second operand 9 states. [2020-10-27 01:39:17,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:39:17,698 INFO L93 Difference]: Finished difference Result 107 states and 152 transitions. [2020-10-27 01:39:17,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:39:17,698 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-10-27 01:39:17,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:39:17,700 INFO L225 Difference]: With dead ends: 107 [2020-10-27 01:39:17,700 INFO L226 Difference]: Without dead ends: 103 [2020-10-27 01:39:17,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:39:17,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-27 01:39:17,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 83. [2020-10-27 01:39:17,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-27 01:39:17,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 123 transitions. [2020-10-27 01:39:17,736 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 123 transitions. Word has length 23 [2020-10-27 01:39:17,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:39:17,736 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 123 transitions. [2020-10-27 01:39:17,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:39:17,736 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 123 transitions. [2020-10-27 01:39:17,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 01:39:17,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:39:17,740 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:39:17,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:39:17,741 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:39:17,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:39:17,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1004192160, now seen corresponding path program 1 times [2020-10-27 01:39:17,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:39:17,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [276557726] [2020-10-27 01:39:17,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:39:17,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:17,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:17,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:17,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:18,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:18,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:39:18,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:39:18,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 365 [2020-10-27 01:39:18,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:18,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:39:18,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:39:18,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:39:18,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:18,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:39:18,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:18,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:18,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:18,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:39:18,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:18,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:39:18,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:18,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:39:18,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:18,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:39:18,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:18,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:39:18,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [276557726] [2020-10-27 01:39:18,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:39:18,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:39:18,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121715595] [2020-10-27 01:39:18,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:39:18,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:39:18,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:39:18,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:39:18,268 INFO L87 Difference]: Start difference. First operand 83 states and 123 transitions. Second operand 9 states. [2020-10-27 01:39:18,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:39:18,783 INFO L93 Difference]: Finished difference Result 114 states and 164 transitions. [2020-10-27 01:39:18,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:39:18,784 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-27 01:39:18,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:39:18,785 INFO L225 Difference]: With dead ends: 114 [2020-10-27 01:39:18,785 INFO L226 Difference]: Without dead ends: 110 [2020-10-27 01:39:18,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:39:18,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-27 01:39:18,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 92. [2020-10-27 01:39:18,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-27 01:39:18,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 139 transitions. [2020-10-27 01:39:18,805 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 139 transitions. Word has length 24 [2020-10-27 01:39:18,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:39:18,806 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 139 transitions. [2020-10-27 01:39:18,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:39:18,806 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 139 transitions. [2020-10-27 01:39:18,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 01:39:18,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:39:18,807 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:39:18,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:39:18,808 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:39:18,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:39:18,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1622282400, now seen corresponding path program 2 times [2020-10-27 01:39:18,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:39:18,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245202664] [2020-10-27 01:39:18,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:39:18,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:18,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:18,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:18,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:19,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:19,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:39:19,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:39:19,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 343 [2020-10-27 01:39:19,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:19,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:39:19,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:39:19,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:39:19,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:39:19,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:39:19,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:19,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:19,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:19,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:39:19,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:19,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:39:19,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:19,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:39:19,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:19,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:39:19,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:19,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:39:19,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245202664] [2020-10-27 01:39:19,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:39:19,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:39:19,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496109269] [2020-10-27 01:39:19,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:39:19,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:39:19,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:39:19,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:39:19,283 INFO L87 Difference]: Start difference. First operand 92 states and 139 transitions. Second operand 9 states. [2020-10-27 01:39:19,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:39:19,786 INFO L93 Difference]: Finished difference Result 123 states and 180 transitions. [2020-10-27 01:39:19,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:39:19,787 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-27 01:39:19,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:39:19,788 INFO L225 Difference]: With dead ends: 123 [2020-10-27 01:39:19,788 INFO L226 Difference]: Without dead ends: 119 [2020-10-27 01:39:19,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:39:19,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-27 01:39:19,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 101. [2020-10-27 01:39:19,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-27 01:39:19,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 155 transitions. [2020-10-27 01:39:19,818 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 155 transitions. Word has length 24 [2020-10-27 01:39:19,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:39:19,819 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 155 transitions. [2020-10-27 01:39:19,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:39:19,819 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 155 transitions. [2020-10-27 01:39:19,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:39:19,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:39:19,820 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:39:19,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:39:19,821 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:39:19,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:39:19,821 INFO L82 PathProgramCache]: Analyzing trace with hash 764253185, now seen corresponding path program 1 times [2020-10-27 01:39:19,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:39:19,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1029362054] [2020-10-27 01:39:19,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:39:19,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:19,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:19,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:19,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:20,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:20,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:39:20,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:39:20,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 449 [2020-10-27 01:39:20,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:20,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:39:20,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:39:20,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 01:39:20,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:20,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:39:20,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:20,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:20,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:20,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:39:20,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:20,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:39:20,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:20,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:39:20,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:20,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:39:20,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:20,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-27 01:39:20,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:20,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:20,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:20,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:39:20,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:20,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:39:20,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:20,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:39:20,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:20,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:39:20,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:20,375 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:39:20,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1029362054] [2020-10-27 01:39:20,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:39:20,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:39:20,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144957127] [2020-10-27 01:39:20,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:39:20,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:39:20,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:39:20,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:39:20,377 INFO L87 Difference]: Start difference. First operand 101 states and 155 transitions. Second operand 9 states. [2020-10-27 01:39:20,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:39:20,854 INFO L93 Difference]: Finished difference Result 124 states and 180 transitions. [2020-10-27 01:39:20,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:39:20,855 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-27 01:39:20,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:39:20,856 INFO L225 Difference]: With dead ends: 124 [2020-10-27 01:39:20,856 INFO L226 Difference]: Without dead ends: 120 [2020-10-27 01:39:20,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:39:20,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-27 01:39:20,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 109. [2020-10-27 01:39:20,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-27 01:39:20,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 163 transitions. [2020-10-27 01:39:20,874 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 163 transitions. Word has length 26 [2020-10-27 01:39:20,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:39:20,874 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 163 transitions. [2020-10-27 01:39:20,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:39:20,875 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 163 transitions. [2020-10-27 01:39:20,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:39:20,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:39:20,876 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:39:20,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:39:20,876 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:39:20,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:39:20,877 INFO L82 PathProgramCache]: Analyzing trace with hash -905092535, now seen corresponding path program 3 times [2020-10-27 01:39:20,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:39:20,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [587010295] [2020-10-27 01:39:20,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:39:20,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:20,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:20,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:20,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:20,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:21,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:21,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:39:21,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:39:21,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 480 [2020-10-27 01:39:21,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:21,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:39:21,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:39:21,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:39:21,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:39:21,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:39:21,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:21,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:21,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:21,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:39:21,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:21,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 01:39:21,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:21,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:39:21,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:21,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:39:21,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:21,504 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:39:21,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [587010295] [2020-10-27 01:39:21,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:39:21,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:39:21,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769882243] [2020-10-27 01:39:21,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:39:21,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:39:21,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:39:21,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:39:21,508 INFO L87 Difference]: Start difference. First operand 109 states and 163 transitions. Second operand 10 states. [2020-10-27 01:39:22,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:39:22,124 INFO L93 Difference]: Finished difference Result 155 states and 225 transitions. [2020-10-27 01:39:22,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:39:22,125 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-27 01:39:22,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:39:22,126 INFO L225 Difference]: With dead ends: 155 [2020-10-27 01:39:22,126 INFO L226 Difference]: Without dead ends: 151 [2020-10-27 01:39:22,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:39:22,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-27 01:39:22,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 122. [2020-10-27 01:39:22,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-27 01:39:22,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 185 transitions. [2020-10-27 01:39:22,152 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 185 transitions. Word has length 26 [2020-10-27 01:39:22,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:39:22,152 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 185 transitions. [2020-10-27 01:39:22,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:39:22,152 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 185 transitions. [2020-10-27 01:39:22,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:39:22,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:39:22,153 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:39:22,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:39:22,154 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:39:22,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:39:22,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1298119545, now seen corresponding path program 3 times [2020-10-27 01:39:22,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:39:22,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375107137] [2020-10-27 01:39:22,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:39:22,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:22,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:22,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:22,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:22,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:22,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:22,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:39:22,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:39:22,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 472 [2020-10-27 01:39:22,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:22,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:39:22,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:39:22,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:39:22,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:22,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:39:22,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:22,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:22,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:22,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:39:22,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:22,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:39:22,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:22,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:39:22,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:22,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:39:22,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:22,764 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:39:22,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375107137] [2020-10-27 01:39:22,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:39:22,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:39:22,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547708064] [2020-10-27 01:39:22,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:39:22,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:39:22,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:39:22,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:39:22,766 INFO L87 Difference]: Start difference. First operand 122 states and 185 transitions. Second operand 10 states. [2020-10-27 01:39:23,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:39:23,438 INFO L93 Difference]: Finished difference Result 166 states and 244 transitions. [2020-10-27 01:39:23,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:39:23,438 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-27 01:39:23,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:39:23,441 INFO L225 Difference]: With dead ends: 166 [2020-10-27 01:39:23,441 INFO L226 Difference]: Without dead ends: 162 [2020-10-27 01:39:23,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:39:23,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-27 01:39:23,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 133. [2020-10-27 01:39:23,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-27 01:39:23,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 204 transitions. [2020-10-27 01:39:23,472 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 204 transitions. Word has length 26 [2020-10-27 01:39:23,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:39:23,472 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 204 transitions. [2020-10-27 01:39:23,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:39:23,473 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 204 transitions. [2020-10-27 01:39:23,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:39:23,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:39:23,473 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:39:23,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:39:23,474 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:39:23,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:39:23,476 INFO L82 PathProgramCache]: Analyzing trace with hash -281019721, now seen corresponding path program 4 times [2020-10-27 01:39:23,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:39:23,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1793967855] [2020-10-27 01:39:23,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:39:23,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:23,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:23,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:23,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:23,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:23,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:23,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:39:23,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:39:23,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 453 [2020-10-27 01:39:23,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:23,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:39:23,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:39:23,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:39:23,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:24,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:39:24,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:24,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:24,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:24,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:39:24,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:24,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:39:24,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:24,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:39:24,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:24,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:39:24,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:24,062 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:39:24,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1793967855] [2020-10-27 01:39:24,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:39:24,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:39:24,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173181139] [2020-10-27 01:39:24,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:39:24,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:39:24,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:39:24,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:39:24,064 INFO L87 Difference]: Start difference. First operand 133 states and 204 transitions. Second operand 10 states. [2020-10-27 01:39:24,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:39:24,664 INFO L93 Difference]: Finished difference Result 182 states and 272 transitions. [2020-10-27 01:39:24,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:39:24,664 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-27 01:39:24,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:39:24,666 INFO L225 Difference]: With dead ends: 182 [2020-10-27 01:39:24,666 INFO L226 Difference]: Without dead ends: 178 [2020-10-27 01:39:24,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:39:24,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-27 01:39:24,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 149. [2020-10-27 01:39:24,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-27 01:39:24,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 231 transitions. [2020-10-27 01:39:24,690 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 231 transitions. Word has length 26 [2020-10-27 01:39:24,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:39:24,690 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 231 transitions. [2020-10-27 01:39:24,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:39:24,690 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 231 transitions. [2020-10-27 01:39:24,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:39:24,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:39:24,691 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:39:24,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:39:24,691 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:39:24,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:39:24,692 INFO L82 PathProgramCache]: Analyzing trace with hash -867825735, now seen corresponding path program 4 times [2020-10-27 01:39:24,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:39:24,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [874554747] [2020-10-27 01:39:24,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:39:24,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:24,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:24,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:24,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:24,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:25,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:25,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:39:25,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:39:25,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 421 [2020-10-27 01:39:25,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:25,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:39:25,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:39:25,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:39:25,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:25,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:39:25,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:25,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:25,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:25,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:39:25,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:25,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:39:25,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:25,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:39:25,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:25,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:39:25,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:25,241 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:39:25,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [874554747] [2020-10-27 01:39:25,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:39:25,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:39:25,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67211034] [2020-10-27 01:39:25,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:39:25,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:39:25,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:39:25,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:39:25,243 INFO L87 Difference]: Start difference. First operand 149 states and 231 transitions. Second operand 10 states. [2020-10-27 01:39:25,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:39:25,814 INFO L93 Difference]: Finished difference Result 198 states and 299 transitions. [2020-10-27 01:39:25,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:39:25,815 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-27 01:39:25,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:39:25,816 INFO L225 Difference]: With dead ends: 198 [2020-10-27 01:39:25,817 INFO L226 Difference]: Without dead ends: 194 [2020-10-27 01:39:25,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:39:25,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-27 01:39:25,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 165. [2020-10-27 01:39:25,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-27 01:39:25,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 258 transitions. [2020-10-27 01:39:25,839 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 258 transitions. Word has length 26 [2020-10-27 01:39:25,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:39:25,840 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 258 transitions. [2020-10-27 01:39:25,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:39:25,840 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 258 transitions. [2020-10-27 01:39:25,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:39:25,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:39:25,841 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:39:25,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:39:25,841 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:39:25,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:39:25,842 INFO L82 PathProgramCache]: Analyzing trace with hash -826638887, now seen corresponding path program 1 times [2020-10-27 01:39:25,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:39:25,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [54594000] [2020-10-27 01:39:25,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:39:25,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:25,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:25,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:25,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:26,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:26,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:39:26,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:39:26,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 467 [2020-10-27 01:39:26,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:26,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:39:26,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:39:26,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:39:26,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:26,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:39:26,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:26,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:26,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:26,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:39:26,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:26,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:39:26,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:26,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:39:26,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:26,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:39:26,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:26,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-27 01:39:26,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:26,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:26,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:26,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:39:26,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:26,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:39:26,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:26,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:39:26,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:26,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:39:26,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:26,416 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:39:26,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [54594000] [2020-10-27 01:39:26,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:39:26,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:39:26,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383766026] [2020-10-27 01:39:26,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:39:26,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:39:26,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:39:26,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:39:26,422 INFO L87 Difference]: Start difference. First operand 165 states and 258 transitions. Second operand 9 states. [2020-10-27 01:39:26,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:39:26,889 INFO L93 Difference]: Finished difference Result 187 states and 281 transitions. [2020-10-27 01:39:26,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:39:26,890 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-10-27 01:39:26,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:39:26,895 INFO L225 Difference]: With dead ends: 187 [2020-10-27 01:39:26,895 INFO L226 Difference]: Without dead ends: 183 [2020-10-27 01:39:26,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:39:26,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-27 01:39:26,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 165. [2020-10-27 01:39:26,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-27 01:39:26,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 258 transitions. [2020-10-27 01:39:26,918 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 258 transitions. Word has length 27 [2020-10-27 01:39:26,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:39:26,918 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 258 transitions. [2020-10-27 01:39:26,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:39:26,919 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 258 transitions. [2020-10-27 01:39:26,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:39:26,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:39:26,921 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:39:26,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 01:39:26,921 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:39:26,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:39:26,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1441242231, now seen corresponding path program 5 times [2020-10-27 01:39:26,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:39:26,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1426479803] [2020-10-27 01:39:26,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:39:26,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:26,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:26,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:26,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:27,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:27,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:27,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:39:27,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:39:27,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 512 [2020-10-27 01:39:27,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:27,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:39:27,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:39:27,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:39:27,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:27,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:39:27,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:27,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:27,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:27,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:39:27,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:27,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:39:27,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:27,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:39:27,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:27,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:39:27,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:27,563 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:39:27,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1426479803] [2020-10-27 01:39:27,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:39:27,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:39:27,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766312276] [2020-10-27 01:39:27,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:39:27,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:39:27,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:39:27,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:39:27,565 INFO L87 Difference]: Start difference. First operand 165 states and 258 transitions. Second operand 10 states. [2020-10-27 01:39:28,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:39:28,160 INFO L93 Difference]: Finished difference Result 211 states and 321 transitions. [2020-10-27 01:39:28,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:39:28,161 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-27 01:39:28,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:39:28,163 INFO L225 Difference]: With dead ends: 211 [2020-10-27 01:39:28,163 INFO L226 Difference]: Without dead ends: 207 [2020-10-27 01:39:28,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:39:28,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-27 01:39:28,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 178. [2020-10-27 01:39:28,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-27 01:39:28,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 280 transitions. [2020-10-27 01:39:28,192 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 280 transitions. Word has length 26 [2020-10-27 01:39:28,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:39:28,193 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 280 transitions. [2020-10-27 01:39:28,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:39:28,193 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 280 transitions. [2020-10-27 01:39:28,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:39:28,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:39:28,194 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:39:28,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 01:39:28,194 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:39:28,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:39:28,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1879980507, now seen corresponding path program 1 times [2020-10-27 01:39:28,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:39:28,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1389282245] [2020-10-27 01:39:28,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:39:28,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:28,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:28,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:28,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:28,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:28,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:39:28,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:39:28,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 470 [2020-10-27 01:39:28,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:28,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:39:28,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:39:28,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:39:28,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:28,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:39:28,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:28,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:28,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:28,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:39:28,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:28,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:39:28,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:28,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:39:28,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:28,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:39:28,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:28,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-27 01:39:28,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:28,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:28,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:28,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:39:28,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:28,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:39:28,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:28,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:39:28,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:28,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:39:28,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:28,775 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:39:28,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1389282245] [2020-10-27 01:39:28,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:39:28,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:39:28,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969809933] [2020-10-27 01:39:28,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:39:28,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:39:28,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:39:28,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:39:28,780 INFO L87 Difference]: Start difference. First operand 178 states and 280 transitions. Second operand 9 states. [2020-10-27 01:39:29,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:39:29,244 INFO L93 Difference]: Finished difference Result 200 states and 303 transitions. [2020-10-27 01:39:29,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:39:29,244 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-10-27 01:39:29,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:39:29,247 INFO L225 Difference]: With dead ends: 200 [2020-10-27 01:39:29,247 INFO L226 Difference]: Without dead ends: 196 [2020-10-27 01:39:29,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:39:29,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-27 01:39:29,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 178. [2020-10-27 01:39:29,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-27 01:39:29,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 280 transitions. [2020-10-27 01:39:29,274 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 280 transitions. Word has length 27 [2020-10-27 01:39:29,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:39:29,274 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 280 transitions. [2020-10-27 01:39:29,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:39:29,274 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 280 transitions. [2020-10-27 01:39:29,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:39:29,275 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:39:29,275 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:39:29,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 01:39:29,275 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:39:29,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:39:29,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1832656711, now seen corresponding path program 5 times [2020-10-27 01:39:29,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:39:29,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1832483825] [2020-10-27 01:39:29,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:39:29,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:29,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:29,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:29,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:29,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:29,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:29,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:39:29,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:39:29,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 494 [2020-10-27 01:39:29,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:29,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:39:29,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:39:29,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:39:29,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:29,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:39:29,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:29,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:29,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:29,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:39:29,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:29,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:39:29,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:29,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:39:29,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:29,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:39:29,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:29,911 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:39:29,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1832483825] [2020-10-27 01:39:29,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:39:29,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:39:29,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698028108] [2020-10-27 01:39:29,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:39:29,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:39:29,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:39:29,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:39:29,915 INFO L87 Difference]: Start difference. First operand 178 states and 280 transitions. Second operand 10 states. [2020-10-27 01:39:30,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:39:30,589 INFO L93 Difference]: Finished difference Result 224 states and 343 transitions. [2020-10-27 01:39:30,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:39:30,590 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-27 01:39:30,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:39:30,592 INFO L225 Difference]: With dead ends: 224 [2020-10-27 01:39:30,593 INFO L226 Difference]: Without dead ends: 220 [2020-10-27 01:39:30,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:39:30,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-27 01:39:30,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 191. [2020-10-27 01:39:30,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-10-27 01:39:30,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 302 transitions. [2020-10-27 01:39:30,623 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 302 transitions. Word has length 26 [2020-10-27 01:39:30,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:39:30,623 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 302 transitions. [2020-10-27 01:39:30,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:39:30,624 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 302 transitions. [2020-10-27 01:39:30,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:39:30,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:39:30,624 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:39:30,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 01:39:30,625 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:39:30,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:39:30,625 INFO L82 PathProgramCache]: Analyzing trace with hash -888825165, now seen corresponding path program 6 times [2020-10-27 01:39:30,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:39:30,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [559712069] [2020-10-27 01:39:30,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:39:30,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:30,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:30,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:30,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:30,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:31,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:31,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:39:31,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:39:31,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 409 [2020-10-27 01:39:31,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:31,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:39:31,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:39:31,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:39:31,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:31,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:39:31,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:31,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:31,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:31,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:39:31,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:31,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:39:31,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:31,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:39:31,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:31,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:39:31,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:31,164 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:39:31,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [559712069] [2020-10-27 01:39:31,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:39:31,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:39:31,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966429249] [2020-10-27 01:39:31,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:39:31,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:39:31,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:39:31,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:39:31,166 INFO L87 Difference]: Start difference. First operand 191 states and 302 transitions. Second operand 10 states. [2020-10-27 01:39:31,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:39:31,817 INFO L93 Difference]: Finished difference Result 233 states and 358 transitions. [2020-10-27 01:39:31,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:39:31,817 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-27 01:39:31,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:39:31,819 INFO L225 Difference]: With dead ends: 233 [2020-10-27 01:39:31,819 INFO L226 Difference]: Without dead ends: 229 [2020-10-27 01:39:31,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:39:31,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-27 01:39:31,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 202. [2020-10-27 01:39:31,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-27 01:39:31,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 321 transitions. [2020-10-27 01:39:31,859 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 321 transitions. Word has length 27 [2020-10-27 01:39:31,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:39:31,859 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 321 transitions. [2020-10-27 01:39:31,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:39:31,859 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 321 transitions. [2020-10-27 01:39:31,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:39:31,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:39:31,860 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:39:31,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 01:39:31,860 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:39:31,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:39:31,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1281852175, now seen corresponding path program 1 times [2020-10-27 01:39:31,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:39:31,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1619759150] [2020-10-27 01:39:31,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:39:31,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:31,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:31,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:31,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:31,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:32,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:32,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:39:32,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:39:32,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 402 [2020-10-27 01:39:32,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:32,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:39:32,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:39:32,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:39:32,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:32,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:39:32,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:32,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:32,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:32,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:39:32,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:32,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:39:32,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:32,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:39:32,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:32,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:39:32,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:32,381 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:39:32,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1619759150] [2020-10-27 01:39:32,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:39:32,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:39:32,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47277912] [2020-10-27 01:39:32,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:39:32,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:39:32,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:39:32,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:39:32,385 INFO L87 Difference]: Start difference. First operand 202 states and 321 transitions. Second operand 10 states. [2020-10-27 01:39:33,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:39:33,013 INFO L93 Difference]: Finished difference Result 245 states and 379 transitions. [2020-10-27 01:39:33,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:39:33,013 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-27 01:39:33,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:39:33,016 INFO L225 Difference]: With dead ends: 245 [2020-10-27 01:39:33,016 INFO L226 Difference]: Without dead ends: 241 [2020-10-27 01:39:33,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:39:33,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-27 01:39:33,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 214. [2020-10-27 01:39:33,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-27 01:39:33,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 342 transitions. [2020-10-27 01:39:33,060 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 342 transitions. Word has length 27 [2020-10-27 01:39:33,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:39:33,061 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 342 transitions. [2020-10-27 01:39:33,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:39:33,061 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 342 transitions. [2020-10-27 01:39:33,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:39:33,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:39:33,062 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:39:33,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 01:39:33,062 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:39:33,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:39:33,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1899942415, now seen corresponding path program 2 times [2020-10-27 01:39:33,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:39:33,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [387788629] [2020-10-27 01:39:33,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:39:33,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:33,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:33,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:33,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:33,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:33,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:33,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:39:33,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:39:33,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 410 [2020-10-27 01:39:33,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:33,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:39:33,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:39:33,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:39:33,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:33,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:39:33,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:33,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:33,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:33,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:39:33,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:33,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:39:33,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:33,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:39:33,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:33,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:39:33,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:33,597 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:39:33,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [387788629] [2020-10-27 01:39:33,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:39:33,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:39:33,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146854852] [2020-10-27 01:39:33,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:39:33,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:39:33,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:39:33,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:39:33,599 INFO L87 Difference]: Start difference. First operand 214 states and 342 transitions. Second operand 10 states. [2020-10-27 01:39:34,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:39:34,277 INFO L93 Difference]: Finished difference Result 256 states and 398 transitions. [2020-10-27 01:39:34,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:39:34,278 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-27 01:39:34,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:39:34,280 INFO L225 Difference]: With dead ends: 256 [2020-10-27 01:39:34,280 INFO L226 Difference]: Without dead ends: 252 [2020-10-27 01:39:34,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:39:34,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-27 01:39:34,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 225. [2020-10-27 01:39:34,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2020-10-27 01:39:34,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 361 transitions. [2020-10-27 01:39:34,310 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 361 transitions. Word has length 27 [2020-10-27 01:39:34,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:39:34,311 INFO L481 AbstractCegarLoop]: Abstraction has 225 states and 361 transitions. [2020-10-27 01:39:34,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:39:34,311 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 361 transitions. [2020-10-27 01:39:34,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:39:34,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:39:34,312 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:39:34,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 01:39:34,312 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:39:34,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:39:34,313 INFO L82 PathProgramCache]: Analyzing trace with hash 2001997871, now seen corresponding path program 6 times [2020-10-27 01:39:34,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:39:34,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2137167551] [2020-10-27 01:39:34,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:39:34,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:34,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:34,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:34,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:34,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:34,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:34,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:39:34,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:39:34,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 376 [2020-10-27 01:39:34,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:34,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:39:34,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:39:34,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:39:34,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:34,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:39:34,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:34,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:34,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:34,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:39:34,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:34,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:39:34,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:34,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:39:34,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:34,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:39:34,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:34,803 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:39:34,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2137167551] [2020-10-27 01:39:34,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:39:34,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:39:34,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625008515] [2020-10-27 01:39:34,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:39:34,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:39:34,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:39:34,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:39:34,805 INFO L87 Difference]: Start difference. First operand 225 states and 361 transitions. Second operand 10 states. [2020-10-27 01:39:35,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:39:35,442 INFO L93 Difference]: Finished difference Result 268 states and 419 transitions. [2020-10-27 01:39:35,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:39:35,443 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-27 01:39:35,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:39:35,446 INFO L225 Difference]: With dead ends: 268 [2020-10-27 01:39:35,446 INFO L226 Difference]: Without dead ends: 264 [2020-10-27 01:39:35,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:39:35,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-10-27 01:39:35,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 237. [2020-10-27 01:39:35,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-10-27 01:39:35,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 382 transitions. [2020-10-27 01:39:35,481 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 382 transitions. Word has length 27 [2020-10-27 01:39:35,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:39:35,481 INFO L481 AbstractCegarLoop]: Abstraction has 237 states and 382 transitions. [2020-10-27 01:39:35,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:39:35,482 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 382 transitions. [2020-10-27 01:39:35,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:39:35,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:39:35,483 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:39:35,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 01:39:35,483 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:39:35,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:39:35,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1798982689, now seen corresponding path program 7 times [2020-10-27 01:39:35,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:39:35,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485460491] [2020-10-27 01:39:35,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:39:35,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:35,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:35,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:35,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:35,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:35,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:35,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:39:35,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:39:35,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 351 [2020-10-27 01:39:35,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:35,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:39:35,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:39:35,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:39:35,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:35,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:39:35,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:35,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:35,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:35,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:39:35,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:35,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:39:35,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:35,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:39:35,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:35,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:39:35,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:35,953 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:39:35,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1485460491] [2020-10-27 01:39:35,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:39:35,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:39:35,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112685863] [2020-10-27 01:39:35,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:39:35,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:39:35,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:39:35,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:39:35,955 INFO L87 Difference]: Start difference. First operand 237 states and 382 transitions. Second operand 10 states. [2020-10-27 01:39:36,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:39:36,581 INFO L93 Difference]: Finished difference Result 283 states and 445 transitions. [2020-10-27 01:39:36,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:39:36,581 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-27 01:39:36,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:39:36,583 INFO L225 Difference]: With dead ends: 283 [2020-10-27 01:39:36,583 INFO L226 Difference]: Without dead ends: 279 [2020-10-27 01:39:36,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:39:36,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-10-27 01:39:36,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 252. [2020-10-27 01:39:36,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-10-27 01:39:36,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 408 transitions. [2020-10-27 01:39:36,616 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 408 transitions. Word has length 27 [2020-10-27 01:39:36,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:39:36,616 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 408 transitions. [2020-10-27 01:39:36,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:39:36,616 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 408 transitions. [2020-10-27 01:39:36,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:39:36,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:39:36,617 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:39:36,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 01:39:36,618 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:39:36,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:39:36,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1405955679, now seen corresponding path program 3 times [2020-10-27 01:39:36,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:39:36,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117831235] [2020-10-27 01:39:36,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:39:36,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:36,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:36,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:36,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:36,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:36,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:36,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:39:36,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:39:36,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 328 [2020-10-27 01:39:36,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:36,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:39:36,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:39:36,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:39:36,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:37,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:39:37,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:37,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:37,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:37,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:39:37,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:37,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:39:37,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:37,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:39:37,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:37,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:39:37,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:37,063 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:39:37,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117831235] [2020-10-27 01:39:37,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:39:37,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:39:37,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175189543] [2020-10-27 01:39:37,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:39:37,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:39:37,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:39:37,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:39:37,065 INFO L87 Difference]: Start difference. First operand 252 states and 408 transitions. Second operand 10 states. [2020-10-27 01:39:37,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:39:37,682 INFO L93 Difference]: Finished difference Result 294 states and 464 transitions. [2020-10-27 01:39:37,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:39:37,683 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-27 01:39:37,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:39:37,686 INFO L225 Difference]: With dead ends: 294 [2020-10-27 01:39:37,686 INFO L226 Difference]: Without dead ends: 290 [2020-10-27 01:39:37,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:39:37,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-10-27 01:39:37,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 263. [2020-10-27 01:39:37,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-10-27 01:39:37,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 427 transitions. [2020-10-27 01:39:37,718 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 427 transitions. Word has length 27 [2020-10-27 01:39:37,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:39:37,718 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 427 transitions. [2020-10-27 01:39:37,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:39:37,719 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 427 transitions. [2020-10-27 01:39:37,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:39:37,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:39:37,720 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:39:37,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 01:39:37,720 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:39:37,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:39:37,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1871911793, now seen corresponding path program 8 times [2020-10-27 01:39:37,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:39:37,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077156432] [2020-10-27 01:39:37,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:39:37,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:37,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:37,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:37,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:37,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:38,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:38,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:39:38,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:39:38,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 294 [2020-10-27 01:39:38,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:38,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:39:38,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:39:38,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:39:38,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:38,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:39:38,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:38,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:38,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:38,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:39:38,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:38,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:39:38,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:38,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:39:38,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:38,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:39:38,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:38,127 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:39:38,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077156432] [2020-10-27 01:39:38,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:39:38,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:39:38,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690298896] [2020-10-27 01:39:38,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:39:38,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:39:38,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:39:38,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:39:38,129 INFO L87 Difference]: Start difference. First operand 263 states and 427 transitions. Second operand 10 states. [2020-10-27 01:39:38,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:39:38,768 INFO L93 Difference]: Finished difference Result 310 states and 491 transitions. [2020-10-27 01:39:38,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:39:38,769 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-27 01:39:38,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:39:38,774 INFO L225 Difference]: With dead ends: 310 [2020-10-27 01:39:38,774 INFO L226 Difference]: Without dead ends: 306 [2020-10-27 01:39:38,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:39:38,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-10-27 01:39:38,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 277. [2020-10-27 01:39:38,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-10-27 01:39:38,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 451 transitions. [2020-10-27 01:39:38,808 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 451 transitions. Word has length 27 [2020-10-27 01:39:38,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:39:38,809 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 451 transitions. [2020-10-27 01:39:38,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:39:38,809 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 451 transitions. [2020-10-27 01:39:38,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:39:38,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:39:38,810 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:39:38,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 01:39:38,810 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:39:38,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:39:38,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1836249489, now seen corresponding path program 4 times [2020-10-27 01:39:38,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:39:38,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1726197454] [2020-10-27 01:39:38,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:39:38,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:38,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:38,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:38,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:38,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:39,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:39,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:39:39,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:39:39,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 296 [2020-10-27 01:39:39,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:39,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:39:39,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:39:39,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:39:39,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:39,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:39:39,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:39,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:39,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:39,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:39:39,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:39,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:39:39,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:39,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:39:39,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:39,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:39:39,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:39,216 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:39:39,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1726197454] [2020-10-27 01:39:39,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:39:39,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:39:39,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740181243] [2020-10-27 01:39:39,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:39:39,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:39:39,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:39:39,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:39:39,218 INFO L87 Difference]: Start difference. First operand 277 states and 451 transitions. Second operand 10 states. [2020-10-27 01:39:39,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:39:39,889 INFO L93 Difference]: Finished difference Result 323 states and 514 transitions. [2020-10-27 01:39:39,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:39:39,891 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-27 01:39:39,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:39:39,895 INFO L225 Difference]: With dead ends: 323 [2020-10-27 01:39:39,895 INFO L226 Difference]: Without dead ends: 319 [2020-10-27 01:39:39,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:39:39,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2020-10-27 01:39:39,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 291. [2020-10-27 01:39:39,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2020-10-27 01:39:39,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 475 transitions. [2020-10-27 01:39:39,935 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 475 transitions. Word has length 27 [2020-10-27 01:39:39,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:39:39,935 INFO L481 AbstractCegarLoop]: Abstraction has 291 states and 475 transitions. [2020-10-27 01:39:39,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:39:39,935 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 475 transitions. [2020-10-27 01:39:39,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:39:39,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:39:39,936 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:39:39,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 01:39:39,936 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:39:39,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:39:39,937 INFO L82 PathProgramCache]: Analyzing trace with hash 210634787, now seen corresponding path program 5 times [2020-10-27 01:39:39,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:39:39,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347269560] [2020-10-27 01:39:39,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:39:39,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:39,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:39,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:39,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:40,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:40,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:40,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:39:40,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:39:40,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 296 [2020-10-27 01:39:40,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:40,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:39:40,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:39:40,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:39:40,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:40,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:39:40,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:40,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:40,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:40,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:39:40,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:40,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:39:40,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:40,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:39:40,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:40,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:39:40,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:40,363 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:39:40,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347269560] [2020-10-27 01:39:40,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:39:40,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:39:40,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668418457] [2020-10-27 01:39:40,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:39:40,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:39:40,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:39:40,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:39:40,365 INFO L87 Difference]: Start difference. First operand 291 states and 475 transitions. Second operand 10 states. [2020-10-27 01:39:41,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:39:41,024 INFO L93 Difference]: Finished difference Result 334 states and 533 transitions. [2020-10-27 01:39:41,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:39:41,025 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-27 01:39:41,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:39:41,030 INFO L225 Difference]: With dead ends: 334 [2020-10-27 01:39:41,030 INFO L226 Difference]: Without dead ends: 330 [2020-10-27 01:39:41,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:39:41,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-10-27 01:39:41,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 303. [2020-10-27 01:39:41,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2020-10-27 01:39:41,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 496 transitions. [2020-10-27 01:39:41,067 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 496 transitions. Word has length 27 [2020-10-27 01:39:41,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:39:41,067 INFO L481 AbstractCegarLoop]: Abstraction has 303 states and 496 transitions. [2020-10-27 01:39:41,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:39:41,067 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 496 transitions. [2020-10-27 01:39:41,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:39:41,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:39:41,068 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:39:41,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 01:39:41,069 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:39:41,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:39:41,069 INFO L82 PathProgramCache]: Analyzing trace with hash -182392223, now seen corresponding path program 7 times [2020-10-27 01:39:41,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:39:41,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [963357575] [2020-10-27 01:39:41,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:39:41,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:41,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:41,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:41,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:41,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:41,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:41,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:39:41,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:39:41,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 285 [2020-10-27 01:39:41,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:41,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:39:41,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:39:41,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:39:41,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:41,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:39:41,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:41,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:41,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:41,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:39:41,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:41,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:39:41,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:41,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:39:41,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:41,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:39:41,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:41,465 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:39:41,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [963357575] [2020-10-27 01:39:41,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:39:41,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:39:41,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645395961] [2020-10-27 01:39:41,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:39:41,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:39:41,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:39:41,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:39:41,466 INFO L87 Difference]: Start difference. First operand 303 states and 496 transitions. Second operand 10 states. [2020-10-27 01:39:42,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:39:42,150 INFO L93 Difference]: Finished difference Result 348 states and 557 transitions. [2020-10-27 01:39:42,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:39:42,150 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-27 01:39:42,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:39:42,153 INFO L225 Difference]: With dead ends: 348 [2020-10-27 01:39:42,153 INFO L226 Difference]: Without dead ends: 344 [2020-10-27 01:39:42,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:39:42,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-10-27 01:39:42,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 317. [2020-10-27 01:39:42,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2020-10-27 01:39:42,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 520 transitions. [2020-10-27 01:39:42,193 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 520 transitions. Word has length 27 [2020-10-27 01:39:42,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:39:42,194 INFO L481 AbstractCegarLoop]: Abstraction has 317 states and 520 transitions. [2020-10-27 01:39:42,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:39:42,194 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 520 transitions. [2020-10-27 01:39:42,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:39:42,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:39:42,195 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:39:42,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 01:39:42,196 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:39:42,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:39:42,196 INFO L82 PathProgramCache]: Analyzing trace with hash 834707601, now seen corresponding path program 6 times [2020-10-27 01:39:42,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:39:42,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [590297297] [2020-10-27 01:39:42,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:39:42,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:42,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:42,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:42,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:42,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:42,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:42,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:39:42,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:39:42,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 297 [2020-10-27 01:39:42,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:42,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:39:42,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:39:42,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:39:42,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:42,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:39:42,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:42,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:42,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:42,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:39:42,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:42,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:39:42,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:42,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:39:42,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:42,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:39:42,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:42,607 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:39:42,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [590297297] [2020-10-27 01:39:42,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:39:42,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:39:42,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792514943] [2020-10-27 01:39:42,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:39:42,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:39:42,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:39:42,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:39:42,611 INFO L87 Difference]: Start difference. First operand 317 states and 520 transitions. Second operand 10 states. [2020-10-27 01:39:43,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:39:43,264 INFO L93 Difference]: Finished difference Result 363 states and 583 transitions. [2020-10-27 01:39:43,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:39:43,266 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-27 01:39:43,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:39:43,271 INFO L225 Difference]: With dead ends: 363 [2020-10-27 01:39:43,271 INFO L226 Difference]: Without dead ends: 359 [2020-10-27 01:39:43,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:39:43,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2020-10-27 01:39:43,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 331. [2020-10-27 01:39:43,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2020-10-27 01:39:43,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 544 transitions. [2020-10-27 01:39:43,312 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 544 transitions. Word has length 27 [2020-10-27 01:39:43,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:39:43,313 INFO L481 AbstractCegarLoop]: Abstraction has 331 states and 544 transitions. [2020-10-27 01:39:43,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:39:43,313 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 544 transitions. [2020-10-27 01:39:43,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:39:43,314 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:39:43,314 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:39:43,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 01:39:43,314 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:39:43,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:39:43,315 INFO L82 PathProgramCache]: Analyzing trace with hash 247901587, now seen corresponding path program 8 times [2020-10-27 01:39:43,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:39:43,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [251217102] [2020-10-27 01:39:43,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:39:43,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:43,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:43,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:43,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:43,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:43,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:43,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:39:43,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:39:43,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 299 [2020-10-27 01:39:43,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:43,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:39:43,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:39:43,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:39:43,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:43,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:39:43,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:43,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:43,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:43,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:39:43,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:43,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:39:43,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:43,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:39:43,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:43,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:39:43,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:43,737 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:39:43,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [251217102] [2020-10-27 01:39:43,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:39:43,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:39:43,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053954701] [2020-10-27 01:39:43,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:39:43,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:39:43,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:39:43,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:39:43,739 INFO L87 Difference]: Start difference. First operand 331 states and 544 transitions. Second operand 10 states. [2020-10-27 01:39:44,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:39:44,427 INFO L93 Difference]: Finished difference Result 378 states and 608 transitions. [2020-10-27 01:39:44,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:39:44,427 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-27 01:39:44,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:39:44,431 INFO L225 Difference]: With dead ends: 378 [2020-10-27 01:39:44,431 INFO L226 Difference]: Without dead ends: 374 [2020-10-27 01:39:44,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:39:44,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2020-10-27 01:39:44,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 345. [2020-10-27 01:39:44,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2020-10-27 01:39:44,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 568 transitions. [2020-10-27 01:39:44,471 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 568 transitions. Word has length 27 [2020-10-27 01:39:44,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:39:44,471 INFO L481 AbstractCegarLoop]: Abstraction has 345 states and 568 transitions. [2020-10-27 01:39:44,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:39:44,471 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 568 transitions. [2020-10-27 01:39:44,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:39:44,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:39:44,473 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:39:44,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 01:39:44,473 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:39:44,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:39:44,473 INFO L82 PathProgramCache]: Analyzing trace with hash 940101145, now seen corresponding path program 3 times [2020-10-27 01:39:44,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:39:44,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [114027268] [2020-10-27 01:39:44,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:39:44,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:44,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:44,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:44,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:44,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:44,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:44,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:39:44,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:39:44,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 323 [2020-10-27 01:39:44,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:44,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:39:44,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:39:44,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 01:39:44,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:39:44,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:39:44,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:44,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:44,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:44,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:39:44,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:44,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:39:44,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:44,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:39:44,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:44,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:39:44,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:44,909 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:39:44,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [114027268] [2020-10-27 01:39:44,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:39:44,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:39:44,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166805184] [2020-10-27 01:39:44,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:39:44,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:39:44,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:39:44,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:39:44,911 INFO L87 Difference]: Start difference. First operand 345 states and 568 transitions. Second operand 10 states. [2020-10-27 01:39:45,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:39:45,595 INFO L93 Difference]: Finished difference Result 389 states and 627 transitions. [2020-10-27 01:39:45,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:39:45,597 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-27 01:39:45,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:39:45,600 INFO L225 Difference]: With dead ends: 389 [2020-10-27 01:39:45,600 INFO L226 Difference]: Without dead ends: 385 [2020-10-27 01:39:45,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:39:45,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2020-10-27 01:39:45,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 358. [2020-10-27 01:39:45,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 358 states. [2020-10-27 01:39:45,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 591 transitions. [2020-10-27 01:39:45,641 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 591 transitions. Word has length 28 [2020-10-27 01:39:45,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:39:45,641 INFO L481 AbstractCegarLoop]: Abstraction has 358 states and 591 transitions. [2020-10-27 01:39:45,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:39:45,641 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 591 transitions. [2020-10-27 01:39:45,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:39:45,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:39:45,642 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:39:45,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 01:39:45,643 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:39:45,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:39:45,643 INFO L82 PathProgramCache]: Analyzing trace with hash 322010905, now seen corresponding path program 4 times [2020-10-27 01:39:45,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:39:45,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241938449] [2020-10-27 01:39:45,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:39:45,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:45,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:45,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:45,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:45,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:45,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:45,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:39:45,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:39:45,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 288 [2020-10-27 01:39:45,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:45,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:39:45,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:39:45,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 01:39:45,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:46,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:39:46,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:46,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:46,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:46,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:39:46,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:46,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:39:46,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:46,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:39:46,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:46,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:39:46,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:46,050 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:39:46,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241938449] [2020-10-27 01:39:46,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:39:46,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:39:46,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331466000] [2020-10-27 01:39:46,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:39:46,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:39:46,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:39:46,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:39:46,052 INFO L87 Difference]: Start difference. First operand 358 states and 591 transitions. Second operand 10 states. [2020-10-27 01:39:46,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:39:46,686 INFO L93 Difference]: Finished difference Result 405 states and 656 transitions. [2020-10-27 01:39:46,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:39:46,687 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-27 01:39:46,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:39:46,689 INFO L225 Difference]: With dead ends: 405 [2020-10-27 01:39:46,689 INFO L226 Difference]: Without dead ends: 401 [2020-10-27 01:39:46,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:39:46,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2020-10-27 01:39:46,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 375. [2020-10-27 01:39:46,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 375 states. [2020-10-27 01:39:46,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 621 transitions. [2020-10-27 01:39:46,736 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 621 transitions. Word has length 28 [2020-10-27 01:39:46,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:39:46,736 INFO L481 AbstractCegarLoop]: Abstraction has 375 states and 621 transitions. [2020-10-27 01:39:46,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:39:46,736 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 621 transitions. [2020-10-27 01:39:46,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:39:46,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:39:46,737 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:39:46,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 01:39:46,738 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:39:46,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:39:46,738 INFO L82 PathProgramCache]: Analyzing trace with hash -71016105, now seen corresponding path program 5 times [2020-10-27 01:39:46,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:39:46,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1038152407] [2020-10-27 01:39:46,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:39:46,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:46,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:46,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:46,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:46,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:47,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:47,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:39:47,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:39:47,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 274 [2020-10-27 01:39:47,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:47,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:39:47,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:39:47,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 01:39:47,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:47,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:39:47,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:47,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:47,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:47,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:39:47,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:47,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:39:47,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:47,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:39:47,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:47,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:39:47,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:47,116 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:39:47,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1038152407] [2020-10-27 01:39:47,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:39:47,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:39:47,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845888331] [2020-10-27 01:39:47,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:39:47,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:39:47,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:39:47,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:39:47,120 INFO L87 Difference]: Start difference. First operand 375 states and 621 transitions. Second operand 10 states. [2020-10-27 01:39:47,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:39:47,791 INFO L93 Difference]: Finished difference Result 417 states and 677 transitions. [2020-10-27 01:39:47,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:39:47,792 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-27 01:39:47,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:39:47,795 INFO L225 Difference]: With dead ends: 417 [2020-10-27 01:39:47,795 INFO L226 Difference]: Without dead ends: 413 [2020-10-27 01:39:47,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:39:47,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2020-10-27 01:39:47,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 387. [2020-10-27 01:39:47,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 387 states. [2020-10-27 01:39:47,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 642 transitions. [2020-10-27 01:39:47,839 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 642 transitions. Word has length 28 [2020-10-27 01:39:47,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:39:47,839 INFO L481 AbstractCegarLoop]: Abstraction has 387 states and 642 transitions. [2020-10-27 01:39:47,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:39:47,839 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 642 transitions. [2020-10-27 01:39:47,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:39:47,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:39:47,840 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:39:47,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 01:39:47,840 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:39:47,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:39:47,841 INFO L82 PathProgramCache]: Analyzing trace with hash -661016551, now seen corresponding path program 6 times [2020-10-27 01:39:47,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:39:47,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122626318] [2020-10-27 01:39:47,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:39:47,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:47,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:47,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:47,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:47,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:48,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:48,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:39:48,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:39:48,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 269 [2020-10-27 01:39:48,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:48,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:39:48,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:39:48,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 01:39:48,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:48,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:39:48,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:48,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:48,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:48,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:39:48,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:48,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:39:48,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:48,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:39:48,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:48,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:39:48,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:48,215 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:39:48,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2122626318] [2020-10-27 01:39:48,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:39:48,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:39:48,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509594091] [2020-10-27 01:39:48,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:39:48,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:39:48,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:39:48,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:39:48,217 INFO L87 Difference]: Start difference. First operand 387 states and 642 transitions. Second operand 10 states. [2020-10-27 01:39:48,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:39:48,874 INFO L93 Difference]: Finished difference Result 430 states and 700 transitions. [2020-10-27 01:39:48,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:39:48,874 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-27 01:39:48,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:39:48,876 INFO L225 Difference]: With dead ends: 430 [2020-10-27 01:39:48,876 INFO L226 Difference]: Without dead ends: 426 [2020-10-27 01:39:48,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:39:48,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-10-27 01:39:48,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 400. [2020-10-27 01:39:48,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2020-10-27 01:39:48,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 665 transitions. [2020-10-27 01:39:48,922 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 665 transitions. Word has length 28 [2020-10-27 01:39:48,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:39:48,922 INFO L481 AbstractCegarLoop]: Abstraction has 400 states and 665 transitions. [2020-10-27 01:39:48,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:39:48,923 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 665 transitions. [2020-10-27 01:39:48,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:39:48,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:39:48,924 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:39:48,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 01:39:48,924 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:39:48,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:39:48,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1054043561, now seen corresponding path program 7 times [2020-10-27 01:39:48,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:39:48,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [522168678] [2020-10-27 01:39:48,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:39:48,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:48,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:48,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:48,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:48,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:49,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:49,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:39:49,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:39:49,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 269 [2020-10-27 01:39:49,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:49,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:39:49,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:39:49,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 01:39:49,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:49,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:39:49,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:49,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:49,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:49,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:39:49,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:49,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:39:49,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:49,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:39:49,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:49,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:39:49,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:49,305 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:39:49,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [522168678] [2020-10-27 01:39:49,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:39:49,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:39:49,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603941674] [2020-10-27 01:39:49,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:39:49,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:39:49,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:39:49,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:39:49,306 INFO L87 Difference]: Start difference. First operand 400 states and 665 transitions. Second operand 10 states. [2020-10-27 01:39:49,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:39:49,972 INFO L93 Difference]: Finished difference Result 446 states and 728 transitions. [2020-10-27 01:39:49,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:39:49,973 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-27 01:39:49,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:39:49,975 INFO L225 Difference]: With dead ends: 446 [2020-10-27 01:39:49,976 INFO L226 Difference]: Without dead ends: 442 [2020-10-27 01:39:49,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:39:49,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2020-10-27 01:39:50,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 416. [2020-10-27 01:39:50,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 416 states. [2020-10-27 01:39:50,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 693 transitions. [2020-10-27 01:39:50,025 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 693 transitions. Word has length 28 [2020-10-27 01:39:50,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:39:50,026 INFO L481 AbstractCegarLoop]: Abstraction has 416 states and 693 transitions. [2020-10-27 01:39:50,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:39:50,026 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 693 transitions. [2020-10-27 01:39:50,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:39:50,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:39:50,027 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:39:50,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 01:39:50,027 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:39:50,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:39:50,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1672133801, now seen corresponding path program 8 times [2020-10-27 01:39:50,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:39:50,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1825203248] [2020-10-27 01:39:50,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:39:50,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:50,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:50,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:50,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:50,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:50,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:50,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:39:50,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:39:50,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 279 [2020-10-27 01:39:50,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:50,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:39:50,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:39:50,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 01:39:50,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:50,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:39:50,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:50,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:50,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:50,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:39:50,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:50,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:39:50,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:50,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:39:50,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:50,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:39:50,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:50,416 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:39:50,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1825203248] [2020-10-27 01:39:50,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:39:50,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:39:50,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003750304] [2020-10-27 01:39:50,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:39:50,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:39:50,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:39:50,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:39:50,421 INFO L87 Difference]: Start difference. First operand 416 states and 693 transitions. Second operand 10 states. [2020-10-27 01:39:51,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:39:51,080 INFO L93 Difference]: Finished difference Result 460 states and 752 transitions. [2020-10-27 01:39:51,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:39:51,081 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-27 01:39:51,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:39:51,084 INFO L225 Difference]: With dead ends: 460 [2020-10-27 01:39:51,084 INFO L226 Difference]: Without dead ends: 456 [2020-10-27 01:39:51,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:39:51,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2020-10-27 01:39:51,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 429. [2020-10-27 01:39:51,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 429 states. [2020-10-27 01:39:51,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 716 transitions. [2020-10-27 01:39:51,132 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 716 transitions. Word has length 28 [2020-10-27 01:39:51,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:39:51,133 INFO L481 AbstractCegarLoop]: Abstraction has 429 states and 716 transitions. [2020-10-27 01:39:51,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:39:51,133 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 716 transitions. [2020-10-27 01:39:51,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:39:51,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:39:51,134 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:39:51,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 01:39:51,134 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:39:51,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:39:51,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1448394598, now seen corresponding path program 9 times [2020-10-27 01:39:51,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:39:51,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400098804] [2020-10-27 01:39:51,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:39:51,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:51,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:51,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:51,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:51,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:51,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:51,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:51,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:39:51,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:39:51,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 344 [2020-10-27 01:39:51,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:51,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:39:51,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:39:51,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:39:51,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:51,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:39:51,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:51,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:51,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:51,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:39:51,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:51,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:39:51,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:51,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:39:51,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:51,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:39:51,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:51,598 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:39:51,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400098804] [2020-10-27 01:39:51,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:39:51,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:39:51,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690115924] [2020-10-27 01:39:51,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:39:51,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:39:51,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:39:51,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:39:51,601 INFO L87 Difference]: Start difference. First operand 429 states and 716 transitions. Second operand 11 states. [2020-10-27 01:39:52,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:39:52,408 INFO L93 Difference]: Finished difference Result 487 states and 795 transitions. [2020-10-27 01:39:52,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:39:52,409 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-10-27 01:39:52,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:39:52,412 INFO L225 Difference]: With dead ends: 487 [2020-10-27 01:39:52,412 INFO L226 Difference]: Without dead ends: 483 [2020-10-27 01:39:52,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:39:52,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2020-10-27 01:39:52,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 445. [2020-10-27 01:39:52,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 445 states. [2020-10-27 01:39:52,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 743 transitions. [2020-10-27 01:39:52,463 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 743 transitions. Word has length 29 [2020-10-27 01:39:52,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:39:52,463 INFO L481 AbstractCegarLoop]: Abstraction has 445 states and 743 transitions. [2020-10-27 01:39:52,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:39:52,463 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 743 transitions. [2020-10-27 01:39:52,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:39:52,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:39:52,464 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:39:52,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 01:39:52,465 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:39:52,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:39:52,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1841421608, now seen corresponding path program 9 times [2020-10-27 01:39:52,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:39:52,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591819904] [2020-10-27 01:39:52,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:39:52,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:52,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:52,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:52,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:52,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:52,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:52,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:52,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:39:52,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:39:52,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 297 [2020-10-27 01:39:52,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:52,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:39:52,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:39:52,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:39:52,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:52,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:39:52,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:52,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:52,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:52,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:39:52,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:52,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:39:52,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:52,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:39:52,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:52,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:39:52,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:52,880 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:39:52,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591819904] [2020-10-27 01:39:52,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:39:52,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:39:52,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812610432] [2020-10-27 01:39:52,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:39:52,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:39:52,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:39:52,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:39:52,882 INFO L87 Difference]: Start difference. First operand 445 states and 743 transitions. Second operand 11 states. [2020-10-27 01:39:53,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:39:53,698 INFO L93 Difference]: Finished difference Result 501 states and 819 transitions. [2020-10-27 01:39:53,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:39:53,699 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-10-27 01:39:53,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:39:53,702 INFO L225 Difference]: With dead ends: 501 [2020-10-27 01:39:53,702 INFO L226 Difference]: Without dead ends: 497 [2020-10-27 01:39:53,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:39:53,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2020-10-27 01:39:53,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 459. [2020-10-27 01:39:53,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 459 states. [2020-10-27 01:39:53,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 767 transitions. [2020-10-27 01:39:53,754 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 767 transitions. Word has length 29 [2020-10-27 01:39:53,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:39:53,754 INFO L481 AbstractCegarLoop]: Abstraction has 459 states and 767 transitions. [2020-10-27 01:39:53,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:39:53,754 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 767 transitions. [2020-10-27 01:39:53,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:39:53,756 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:39:53,756 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:39:53,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 01:39:53,756 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:39:53,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:39:53,756 INFO L82 PathProgramCache]: Analyzing trace with hash -824321784, now seen corresponding path program 10 times [2020-10-27 01:39:53,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:39:53,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [82473193] [2020-10-27 01:39:53,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:39:53,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:53,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:53,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:53,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:53,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:53,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:54,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:54,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:39:54,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:39:54,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 270 [2020-10-27 01:39:54,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:54,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:39:54,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:39:54,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:39:54,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:54,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:39:54,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:54,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:54,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:54,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:39:54,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:54,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:39:54,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:54,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:39:54,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:54,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:39:54,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:54,161 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:39:54,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [82473193] [2020-10-27 01:39:54,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:39:54,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:39:54,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98183309] [2020-10-27 01:39:54,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:39:54,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:39:54,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:39:54,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:39:54,162 INFO L87 Difference]: Start difference. First operand 459 states and 767 transitions. Second operand 11 states. [2020-10-27 01:39:54,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:39:54,994 INFO L93 Difference]: Finished difference Result 523 states and 857 transitions. [2020-10-27 01:39:54,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:39:54,995 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-10-27 01:39:54,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:39:54,999 INFO L225 Difference]: With dead ends: 523 [2020-10-27 01:39:55,000 INFO L226 Difference]: Without dead ends: 519 [2020-10-27 01:39:55,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:39:55,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2020-10-27 01:39:55,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 481. [2020-10-27 01:39:55,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 481 states. [2020-10-27 01:39:55,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 804 transitions. [2020-10-27 01:39:55,055 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 804 transitions. Word has length 29 [2020-10-27 01:39:55,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:39:55,055 INFO L481 AbstractCegarLoop]: Abstraction has 481 states and 804 transitions. [2020-10-27 01:39:55,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:39:55,055 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 804 transitions. [2020-10-27 01:39:55,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:39:55,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:39:55,056 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:39:55,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 01:39:55,057 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:39:55,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:39:55,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1411127798, now seen corresponding path program 10 times [2020-10-27 01:39:55,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:39:55,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [403353949] [2020-10-27 01:39:55,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:39:55,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:55,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:55,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:55,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:55,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:55,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:55,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:55,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:39:55,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:39:55,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 303 [2020-10-27 01:39:55,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:55,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:39:55,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:39:55,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:39:55,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:55,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:39:55,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:55,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:55,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:55,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:39:55,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:55,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:39:55,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:55,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:39:55,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:55,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:39:55,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:55,490 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:39:55,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [403353949] [2020-10-27 01:39:55,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:39:55,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:39:55,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897636229] [2020-10-27 01:39:55,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:39:55,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:39:55,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:39:55,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:39:55,492 INFO L87 Difference]: Start difference. First operand 481 states and 804 transitions. Second operand 11 states. [2020-10-27 01:39:56,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:39:56,450 INFO L93 Difference]: Finished difference Result 545 states and 894 transitions. [2020-10-27 01:39:56,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:39:56,450 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-10-27 01:39:56,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:39:56,454 INFO L225 Difference]: With dead ends: 545 [2020-10-27 01:39:56,454 INFO L226 Difference]: Without dead ends: 541 [2020-10-27 01:39:56,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:39:56,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2020-10-27 01:39:56,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 503. [2020-10-27 01:39:56,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 503 states. [2020-10-27 01:39:56,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 841 transitions. [2020-10-27 01:39:56,516 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 841 transitions. Word has length 29 [2020-10-27 01:39:56,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:39:56,517 INFO L481 AbstractCegarLoop]: Abstraction has 503 states and 841 transitions. [2020-10-27 01:39:56,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:39:56,517 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 841 transitions. [2020-10-27 01:39:56,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:39:56,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:39:56,518 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 01:39:56,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 01:39:56,518 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:39:56,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:39:56,519 INFO L82 PathProgramCache]: Analyzing trace with hash -489133656, now seen corresponding path program 1 times [2020-10-27 01:39:56,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:39:56,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066412127] [2020-10-27 01:39:56,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:39:56,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:56,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:56,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:56,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:56,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:56,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:56,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:56,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:39:56,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:39:56,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 470 [2020-10-27 01:39:57,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:57,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:39:57,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:39:57,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:39:57,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:57,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:39:57,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:57,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:57,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:57,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:39:57,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:57,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:39:57,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:57,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:39:57,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:57,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:39:57,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:57,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-27 01:39:57,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:57,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:57,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:57,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:39:57,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:57,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:39:57,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:57,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:39:57,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:57,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:39:57,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:57,095 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:39:57,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066412127] [2020-10-27 01:39:57,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:39:57,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:39:57,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512010707] [2020-10-27 01:39:57,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:39:57,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:39:57,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:39:57,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:39:57,097 INFO L87 Difference]: Start difference. First operand 503 states and 841 transitions. Second operand 10 states. [2020-10-27 01:39:57,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:39:57,751 INFO L93 Difference]: Finished difference Result 537 states and 880 transitions. [2020-10-27 01:39:57,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:39:57,752 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-10-27 01:39:57,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:39:57,755 INFO L225 Difference]: With dead ends: 537 [2020-10-27 01:39:57,755 INFO L226 Difference]: Without dead ends: 533 [2020-10-27 01:39:57,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:39:57,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2020-10-27 01:39:57,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 503. [2020-10-27 01:39:57,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 503 states. [2020-10-27 01:39:57,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 841 transitions. [2020-10-27 01:39:57,820 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 841 transitions. Word has length 30 [2020-10-27 01:39:57,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:39:57,820 INFO L481 AbstractCegarLoop]: Abstraction has 503 states and 841 transitions. [2020-10-27 01:39:57,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:39:57,820 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 841 transitions. [2020-10-27 01:39:57,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:39:57,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:39:57,822 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:39:57,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 01:39:57,822 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:39:57,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:39:57,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1984544294, now seen corresponding path program 11 times [2020-10-27 01:39:57,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:39:57,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1823672628] [2020-10-27 01:39:57,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:39:57,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:57,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:57,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:57,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:57,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:57,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:58,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:58,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:39:58,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:39:58,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 355 [2020-10-27 01:39:58,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:58,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:39:58,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:39:58,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:39:58,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:58,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:39:58,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:58,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:58,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:58,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:39:58,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:58,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:39:58,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:58,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:39:58,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:58,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:39:58,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:58,297 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:39:58,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1823672628] [2020-10-27 01:39:58,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:39:58,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:39:58,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317605815] [2020-10-27 01:39:58,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:39:58,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:39:58,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:39:58,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:39:58,299 INFO L87 Difference]: Start difference. First operand 503 states and 841 transitions. Second operand 11 states. [2020-10-27 01:39:59,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:39:59,138 INFO L93 Difference]: Finished difference Result 562 states and 923 transitions. [2020-10-27 01:39:59,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:39:59,138 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-10-27 01:39:59,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:39:59,142 INFO L225 Difference]: With dead ends: 562 [2020-10-27 01:39:59,142 INFO L226 Difference]: Without dead ends: 558 [2020-10-27 01:39:59,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:39:59,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2020-10-27 01:39:59,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 519. [2020-10-27 01:39:59,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 519 states. [2020-10-27 01:39:59,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 868 transitions. [2020-10-27 01:39:59,204 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 868 transitions. Word has length 29 [2020-10-27 01:39:59,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:39:59,204 INFO L481 AbstractCegarLoop]: Abstraction has 519 states and 868 transitions. [2020-10-27 01:39:59,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:39:59,204 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 868 transitions. [2020-10-27 01:39:59,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:39:59,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:39:59,205 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 01:39:59,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 01:39:59,206 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:39:59,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:39:59,206 INFO L82 PathProgramCache]: Analyzing trace with hash -2077481558, now seen corresponding path program 1 times [2020-10-27 01:39:59,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:39:59,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760730071] [2020-10-27 01:39:59,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:39:59,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:59,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:59,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:59,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:59,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:59,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:59,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:59,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:39:59,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:39:59,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 454 [2020-10-27 01:39:59,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:59,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:39:59,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:39:59,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:39:59,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:59,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:39:59,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:59,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:59,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:59,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:39:59,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:59,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:39:59,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:59,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:39:59,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:59,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:39:59,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:59,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-27 01:39:59,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:59,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:59,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:59,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:39:59,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:59,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:39:59,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:59,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:39:59,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:59,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:39:59,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:59,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:39:59,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1760730071] [2020-10-27 01:39:59,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:39:59,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:39:59,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962867773] [2020-10-27 01:39:59,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:39:59,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:39:59,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:39:59,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:39:59,770 INFO L87 Difference]: Start difference. First operand 519 states and 868 transitions. Second operand 10 states. [2020-10-27 01:40:00,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:00,395 INFO L93 Difference]: Finished difference Result 553 states and 907 transitions. [2020-10-27 01:40:00,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:40:00,395 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-10-27 01:40:00,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:00,398 INFO L225 Difference]: With dead ends: 553 [2020-10-27 01:40:00,399 INFO L226 Difference]: Without dead ends: 549 [2020-10-27 01:40:00,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:40:00,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2020-10-27 01:40:00,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 519. [2020-10-27 01:40:00,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 519 states. [2020-10-27 01:40:00,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 868 transitions. [2020-10-27 01:40:00,460 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 868 transitions. Word has length 30 [2020-10-27 01:40:00,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:00,460 INFO L481 AbstractCegarLoop]: Abstraction has 519 states and 868 transitions. [2020-10-27 01:40:00,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:40:00,460 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 868 transitions. [2020-10-27 01:40:00,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:40:00,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:00,462 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:00,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 01:40:00,462 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:00,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:00,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1289354648, now seen corresponding path program 11 times [2020-10-27 01:40:00,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:00,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [332059156] [2020-10-27 01:40:00,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:00,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:00,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:00,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:00,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:00,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:00,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:00,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:00,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:40:00,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:40:00,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 301 [2020-10-27 01:40:00,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:00,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:40:00,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:00,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:40:00,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:00,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:00,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:00,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:00,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:00,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:00,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:00,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:40:00,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:00,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:00,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:00,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:00,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:00,899 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:00,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [332059156] [2020-10-27 01:40:00,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:00,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:40:00,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364030344] [2020-10-27 01:40:00,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:40:00,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:00,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:40:00,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:40:00,902 INFO L87 Difference]: Start difference. First operand 519 states and 868 transitions. Second operand 11 states. [2020-10-27 01:40:01,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:01,751 INFO L93 Difference]: Finished difference Result 578 states and 950 transitions. [2020-10-27 01:40:01,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:40:01,752 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-10-27 01:40:01,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:01,756 INFO L225 Difference]: With dead ends: 578 [2020-10-27 01:40:01,757 INFO L226 Difference]: Without dead ends: 574 [2020-10-27 01:40:01,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:40:01,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2020-10-27 01:40:01,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 535. [2020-10-27 01:40:01,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 535 states. [2020-10-27 01:40:01,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 895 transitions. [2020-10-27 01:40:01,823 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 895 transitions. Word has length 29 [2020-10-27 01:40:01,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:01,824 INFO L481 AbstractCegarLoop]: Abstraction has 535 states and 895 transitions. [2020-10-27 01:40:01,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:40:01,824 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 895 transitions. [2020-10-27 01:40:01,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:40:01,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:01,825 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 01:40:01,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 01:40:01,826 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:01,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:01,826 INFO L82 PathProgramCache]: Analyzing trace with hash 919345530, now seen corresponding path program 2 times [2020-10-27 01:40:01,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:01,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685664674] [2020-10-27 01:40:01,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:01,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:01,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:01,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:01,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:01,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:01,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:02,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:02,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:40:02,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:40:02,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 455 [2020-10-27 01:40:02,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:02,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:40:02,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:02,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:40:02,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:02,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:02,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:02,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:02,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:02,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:02,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:02,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:40:02,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:02,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:02,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:02,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:02,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:02,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-27 01:40:02,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:02,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:02,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:02,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:40:02,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:02,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:40:02,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:02,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:40:02,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:02,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:40:02,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:02,394 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:02,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685664674] [2020-10-27 01:40:02,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:02,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:40:02,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258841277] [2020-10-27 01:40:02,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:40:02,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:02,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:40:02,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:40:02,396 INFO L87 Difference]: Start difference. First operand 535 states and 895 transitions. Second operand 10 states. [2020-10-27 01:40:03,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:03,070 INFO L93 Difference]: Finished difference Result 570 states and 936 transitions. [2020-10-27 01:40:03,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:40:03,071 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-10-27 01:40:03,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:03,074 INFO L225 Difference]: With dead ends: 570 [2020-10-27 01:40:03,074 INFO L226 Difference]: Without dead ends: 566 [2020-10-27 01:40:03,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:40:03,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2020-10-27 01:40:03,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 535. [2020-10-27 01:40:03,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 535 states. [2020-10-27 01:40:03,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 895 transitions. [2020-10-27 01:40:03,137 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 895 transitions. Word has length 30 [2020-10-27 01:40:03,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:03,137 INFO L481 AbstractCegarLoop]: Abstraction has 535 states and 895 transitions. [2020-10-27 01:40:03,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:40:03,137 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 895 transitions. [2020-10-27 01:40:03,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:40:03,138 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:03,138 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:03,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 01:40:03,139 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:03,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:03,139 INFO L82 PathProgramCache]: Analyzing trace with hash -276541496, now seen corresponding path program 12 times [2020-10-27 01:40:03,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:03,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518387766] [2020-10-27 01:40:03,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:03,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:03,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:03,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:03,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:03,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:03,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:03,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:03,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:40:03,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:40:03,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 335 [2020-10-27 01:40:03,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:03,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:40:03,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:03,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:40:03,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:03,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:03,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:03,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:03,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:03,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:03,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:03,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:40:03,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:03,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:03,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:03,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:03,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:03,604 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:03,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518387766] [2020-10-27 01:40:03,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:03,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:40:03,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768491761] [2020-10-27 01:40:03,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:40:03,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:03,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:40:03,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:40:03,605 INFO L87 Difference]: Start difference. First operand 535 states and 895 transitions. Second operand 11 states. [2020-10-27 01:40:04,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:04,476 INFO L93 Difference]: Finished difference Result 593 states and 975 transitions. [2020-10-27 01:40:04,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:40:04,476 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-10-27 01:40:04,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:04,480 INFO L225 Difference]: With dead ends: 593 [2020-10-27 01:40:04,480 INFO L226 Difference]: Without dead ends: 589 [2020-10-27 01:40:04,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:40:04,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2020-10-27 01:40:04,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 551. [2020-10-27 01:40:04,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 551 states. [2020-10-27 01:40:04,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 922 transitions. [2020-10-27 01:40:04,544 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 922 transitions. Word has length 29 [2020-10-27 01:40:04,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:04,544 INFO L481 AbstractCegarLoop]: Abstraction has 551 states and 922 transitions. [2020-10-27 01:40:04,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:40:04,545 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 922 transitions. [2020-10-27 01:40:04,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:40:04,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:04,546 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 01:40:04,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-27 01:40:04,546 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:04,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:04,547 INFO L82 PathProgramCache]: Analyzing trace with hash 101697080, now seen corresponding path program 2 times [2020-10-27 01:40:04,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:04,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438815077] [2020-10-27 01:40:04,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:04,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:04,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:04,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:04,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:04,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:04,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:05,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:05,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:40:05,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:40:05,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 472 [2020-10-27 01:40:05,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:05,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:40:05,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:05,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:40:05,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:05,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:05,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:05,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:05,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:05,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:05,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:05,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:40:05,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:05,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:05,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:05,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:05,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:05,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-27 01:40:05,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:05,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:05,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:05,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:40:05,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:05,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:40:05,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:05,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:40:05,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:05,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:40:05,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:05,136 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:05,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438815077] [2020-10-27 01:40:05,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:05,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:40:05,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431208784] [2020-10-27 01:40:05,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:40:05,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:05,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:40:05,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:40:05,137 INFO L87 Difference]: Start difference. First operand 551 states and 922 transitions. Second operand 10 states. [2020-10-27 01:40:05,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:05,844 INFO L93 Difference]: Finished difference Result 586 states and 963 transitions. [2020-10-27 01:40:05,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:40:05,845 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-10-27 01:40:05,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:05,849 INFO L225 Difference]: With dead ends: 586 [2020-10-27 01:40:05,849 INFO L226 Difference]: Without dead ends: 582 [2020-10-27 01:40:05,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:40:05,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2020-10-27 01:40:05,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 551. [2020-10-27 01:40:05,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 551 states. [2020-10-27 01:40:05,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 922 transitions. [2020-10-27 01:40:05,904 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 922 transitions. Word has length 30 [2020-10-27 01:40:05,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:05,904 INFO L481 AbstractCegarLoop]: Abstraction has 551 states and 922 transitions. [2020-10-27 01:40:05,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:40:05,904 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 922 transitions. [2020-10-27 01:40:05,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:40:05,906 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:05,906 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:05,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-27 01:40:05,906 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:05,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:05,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1965485238, now seen corresponding path program 12 times [2020-10-27 01:40:05,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:05,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [648835290] [2020-10-27 01:40:05,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:05,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:05,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:05,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:05,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:05,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:06,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:06,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:06,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:40:06,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:40:06,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 297 [2020-10-27 01:40:06,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:06,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:40:06,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:06,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:40:06,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:06,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:06,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:06,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:06,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:06,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:06,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:06,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:40:06,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:06,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:06,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:06,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:06,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:06,330 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:06,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [648835290] [2020-10-27 01:40:06,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:06,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:40:06,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639951728] [2020-10-27 01:40:06,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:40:06,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:06,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:40:06,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:40:06,332 INFO L87 Difference]: Start difference. First operand 551 states and 922 transitions. Second operand 11 states. [2020-10-27 01:40:07,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:07,171 INFO L93 Difference]: Finished difference Result 609 states and 1002 transitions. [2020-10-27 01:40:07,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:40:07,172 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-10-27 01:40:07,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:07,176 INFO L225 Difference]: With dead ends: 609 [2020-10-27 01:40:07,177 INFO L226 Difference]: Without dead ends: 605 [2020-10-27 01:40:07,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:40:07,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2020-10-27 01:40:07,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 567. [2020-10-27 01:40:07,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 567 states. [2020-10-27 01:40:07,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 949 transitions. [2020-10-27 01:40:07,256 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 949 transitions. Word has length 29 [2020-10-27 01:40:07,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:07,256 INFO L481 AbstractCegarLoop]: Abstraction has 567 states and 949 transitions. [2020-10-27 01:40:07,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:40:07,256 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 949 transitions. [2020-10-27 01:40:07,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:40:07,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:07,257 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:07,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-27 01:40:07,258 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:07,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:07,258 INFO L82 PathProgramCache]: Analyzing trace with hash -551319934, now seen corresponding path program 13 times [2020-10-27 01:40:07,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:07,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [656135742] [2020-10-27 01:40:07,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:07,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:07,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:07,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:07,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:07,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:07,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:07,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:07,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:40:07,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:40:07,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 434 [2020-10-27 01:40:07,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:07,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:40:07,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:07,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:40:07,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:07,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:07,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:07,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:07,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:07,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:07,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:07,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:40:07,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:07,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:07,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:07,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:07,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:07,829 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:07,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [656135742] [2020-10-27 01:40:07,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:07,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:40:07,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170196921] [2020-10-27 01:40:07,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:40:07,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:07,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:40:07,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:40:07,830 INFO L87 Difference]: Start difference. First operand 567 states and 949 transitions. Second operand 11 states. [2020-10-27 01:40:08,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:08,691 INFO L93 Difference]: Finished difference Result 635 states and 1042 transitions. [2020-10-27 01:40:08,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:40:08,691 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-27 01:40:08,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:08,695 INFO L225 Difference]: With dead ends: 635 [2020-10-27 01:40:08,695 INFO L226 Difference]: Without dead ends: 631 [2020-10-27 01:40:08,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:40:08,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2020-10-27 01:40:08,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 585. [2020-10-27 01:40:08,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 585 states. [2020-10-27 01:40:08,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 980 transitions. [2020-10-27 01:40:08,744 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 980 transitions. Word has length 30 [2020-10-27 01:40:08,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:08,744 INFO L481 AbstractCegarLoop]: Abstraction has 585 states and 980 transitions. [2020-10-27 01:40:08,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:40:08,744 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 980 transitions. [2020-10-27 01:40:08,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:40:08,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:08,745 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:08,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-27 01:40:08,746 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:08,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:08,746 INFO L82 PathProgramCache]: Analyzing trace with hash -944346944, now seen corresponding path program 7 times [2020-10-27 01:40:08,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:08,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [458613436] [2020-10-27 01:40:08,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:08,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:08,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:08,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:08,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:08,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:08,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:09,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:09,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:40:09,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:40:09,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 360 [2020-10-27 01:40:09,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:09,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:40:09,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:09,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:40:09,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:09,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:09,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:09,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:09,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:09,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:09,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:09,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:40:09,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:09,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:09,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:09,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:09,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:09,236 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:09,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [458613436] [2020-10-27 01:40:09,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:09,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:40:09,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349589525] [2020-10-27 01:40:09,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:40:09,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:09,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:40:09,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:40:09,238 INFO L87 Difference]: Start difference. First operand 585 states and 980 transitions. Second operand 11 states. [2020-10-27 01:40:10,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:10,057 INFO L93 Difference]: Finished difference Result 640 states and 1055 transitions. [2020-10-27 01:40:10,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:40:10,058 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-27 01:40:10,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:10,062 INFO L225 Difference]: With dead ends: 640 [2020-10-27 01:40:10,062 INFO L226 Difference]: Without dead ends: 636 [2020-10-27 01:40:10,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:40:10,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2020-10-27 01:40:10,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 600. [2020-10-27 01:40:10,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 600 states. [2020-10-27 01:40:10,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 1006 transitions. [2020-10-27 01:40:10,115 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 1006 transitions. Word has length 30 [2020-10-27 01:40:10,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:10,116 INFO L481 AbstractCegarLoop]: Abstraction has 600 states and 1006 transitions. [2020-10-27 01:40:10,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:40:10,116 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 1006 transitions. [2020-10-27 01:40:10,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:40:10,117 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:10,117 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:10,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-27 01:40:10,118 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:10,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:10,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1562437184, now seen corresponding path program 8 times [2020-10-27 01:40:10,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:10,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362132859] [2020-10-27 01:40:10,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:10,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:10,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:10,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:10,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:10,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:10,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:10,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:10,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:40:10,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:40:10,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 314 [2020-10-27 01:40:10,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:10,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:40:10,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:10,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:40:10,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:10,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:10,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:10,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:10,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:10,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:10,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:10,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:40:10,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:10,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:10,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:10,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:10,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:10,570 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:10,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362132859] [2020-10-27 01:40:10,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:10,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:40:10,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816916820] [2020-10-27 01:40:10,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:40:10,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:10,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:40:10,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:40:10,572 INFO L87 Difference]: Start difference. First operand 600 states and 1006 transitions. Second operand 11 states. [2020-10-27 01:40:11,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:11,394 INFO L93 Difference]: Finished difference Result 654 states and 1079 transitions. [2020-10-27 01:40:11,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:40:11,394 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-27 01:40:11,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:11,398 INFO L225 Difference]: With dead ends: 654 [2020-10-27 01:40:11,398 INFO L226 Difference]: Without dead ends: 650 [2020-10-27 01:40:11,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:40:11,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2020-10-27 01:40:11,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 614. [2020-10-27 01:40:11,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 614 states. [2020-10-27 01:40:11,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 1030 transitions. [2020-10-27 01:40:11,445 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 1030 transitions. Word has length 30 [2020-10-27 01:40:11,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:11,445 INFO L481 AbstractCegarLoop]: Abstraction has 614 states and 1030 transitions. [2020-10-27 01:40:11,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:40:11,445 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 1030 transitions. [2020-10-27 01:40:11,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:40:11,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:11,446 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:11,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-27 01:40:11,447 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:11,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:11,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1955464194, now seen corresponding path program 13 times [2020-10-27 01:40:11,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:11,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [874198916] [2020-10-27 01:40:11,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:11,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:11,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:11,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:11,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:11,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:11,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:11,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:11,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:40:11,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:40:11,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 326 [2020-10-27 01:40:11,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:11,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:40:11,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:11,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:40:11,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:11,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:11,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:11,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:11,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:11,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:11,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:11,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:40:11,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:11,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:11,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:11,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:11,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:11,900 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:11,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [874198916] [2020-10-27 01:40:11,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:11,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:40:11,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655693399] [2020-10-27 01:40:11,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:40:11,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:11,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:40:11,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:40:11,901 INFO L87 Difference]: Start difference. First operand 614 states and 1030 transitions. Second operand 11 states. [2020-10-27 01:40:12,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:12,777 INFO L93 Difference]: Finished difference Result 683 states and 1125 transitions. [2020-10-27 01:40:12,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:40:12,778 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-27 01:40:12,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:12,783 INFO L225 Difference]: With dead ends: 683 [2020-10-27 01:40:12,783 INFO L226 Difference]: Without dead ends: 679 [2020-10-27 01:40:12,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:40:12,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2020-10-27 01:40:12,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 633. [2020-10-27 01:40:12,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 633 states. [2020-10-27 01:40:12,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1063 transitions. [2020-10-27 01:40:12,833 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1063 transitions. Word has length 30 [2020-10-27 01:40:12,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:12,833 INFO L481 AbstractCegarLoop]: Abstraction has 633 states and 1063 transitions. [2020-10-27 01:40:12,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:40:12,833 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1063 transitions. [2020-10-27 01:40:12,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:40:12,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:12,834 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:12,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-27 01:40:12,834 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:12,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:12,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1743460910, now seen corresponding path program 9 times [2020-10-27 01:40:12,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:12,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1814579807] [2020-10-27 01:40:12,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:12,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:12,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:12,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:12,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:12,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:12,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:13,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:13,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:40:13,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:40:13,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 319 [2020-10-27 01:40:13,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:13,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:40:13,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:13,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:40:13,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:13,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:13,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:13,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:13,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:13,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:13,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:13,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:40:13,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:13,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:13,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:13,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:13,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:13,283 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:13,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1814579807] [2020-10-27 01:40:13,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:13,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:40:13,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209124092] [2020-10-27 01:40:13,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:40:13,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:13,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:40:13,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:40:13,285 INFO L87 Difference]: Start difference. First operand 633 states and 1063 transitions. Second operand 11 states. [2020-10-27 01:40:14,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:14,117 INFO L93 Difference]: Finished difference Result 688 states and 1138 transitions. [2020-10-27 01:40:14,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:40:14,118 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-27 01:40:14,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:14,122 INFO L225 Difference]: With dead ends: 688 [2020-10-27 01:40:14,122 INFO L226 Difference]: Without dead ends: 684 [2020-10-27 01:40:14,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:40:14,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2020-10-27 01:40:14,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 648. [2020-10-27 01:40:14,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 648 states. [2020-10-27 01:40:14,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1089 transitions. [2020-10-27 01:40:14,175 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1089 transitions. Word has length 30 [2020-10-27 01:40:14,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:14,175 INFO L481 AbstractCegarLoop]: Abstraction has 648 states and 1089 transitions. [2020-10-27 01:40:14,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:40:14,175 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1089 transitions. [2020-10-27 01:40:14,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:40:14,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:14,177 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:14,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-27 01:40:14,177 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:14,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:14,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1534406562, now seen corresponding path program 14 times [2020-10-27 01:40:14,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:14,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [230056310] [2020-10-27 01:40:14,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:14,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:14,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:14,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:14,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:14,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:14,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:14,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:14,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:40:14,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:40:14,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 412 [2020-10-27 01:40:14,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:14,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:40:14,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:14,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:40:14,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:14,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:14,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:14,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:14,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:14,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:14,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:14,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:40:14,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:14,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:14,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:14,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:14,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:14,726 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:14,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [230056310] [2020-10-27 01:40:14,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:14,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:40:14,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141783678] [2020-10-27 01:40:14,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:40:14,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:14,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:40:14,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:40:14,729 INFO L87 Difference]: Start difference. First operand 648 states and 1089 transitions. Second operand 11 states. [2020-10-27 01:40:15,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:15,609 INFO L93 Difference]: Finished difference Result 718 states and 1188 transitions. [2020-10-27 01:40:15,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:40:15,610 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-27 01:40:15,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:15,614 INFO L225 Difference]: With dead ends: 718 [2020-10-27 01:40:15,614 INFO L226 Difference]: Without dead ends: 714 [2020-10-27 01:40:15,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:40:15,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2020-10-27 01:40:15,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 670. [2020-10-27 01:40:15,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 670 states. [2020-10-27 01:40:15,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 1127 transitions. [2020-10-27 01:40:15,667 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 1127 transitions. Word has length 30 [2020-10-27 01:40:15,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:15,667 INFO L481 AbstractCegarLoop]: Abstraction has 670 states and 1127 transitions. [2020-10-27 01:40:15,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:40:15,667 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 1127 transitions. [2020-10-27 01:40:15,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:40:15,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:15,668 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:15,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-27 01:40:15,668 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:15,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:15,669 INFO L82 PathProgramCache]: Analyzing trace with hash -2121212576, now seen corresponding path program 10 times [2020-10-27 01:40:15,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:15,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [329319346] [2020-10-27 01:40:15,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:15,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:15,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:15,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:15,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:15,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:15,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:15,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:15,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:40:15,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:40:15,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 288 [2020-10-27 01:40:15,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:15,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:40:15,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:15,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:40:15,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:16,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:16,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:16,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:16,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:16,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:16,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:16,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:40:16,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:16,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:16,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:16,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:16,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:16,087 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:16,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [329319346] [2020-10-27 01:40:16,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:16,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:40:16,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040492025] [2020-10-27 01:40:16,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:40:16,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:16,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:40:16,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:40:16,088 INFO L87 Difference]: Start difference. First operand 670 states and 1127 transitions. Second operand 11 states. [2020-10-27 01:40:17,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:17,019 INFO L93 Difference]: Finished difference Result 731 states and 1212 transitions. [2020-10-27 01:40:17,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:40:17,019 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-27 01:40:17,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:17,023 INFO L225 Difference]: With dead ends: 731 [2020-10-27 01:40:17,023 INFO L226 Difference]: Without dead ends: 727 [2020-10-27 01:40:17,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:40:17,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2020-10-27 01:40:17,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 690. [2020-10-27 01:40:17,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 690 states. [2020-10-27 01:40:17,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1161 transitions. [2020-10-27 01:40:17,084 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1161 transitions. Word has length 30 [2020-10-27 01:40:17,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:17,084 INFO L481 AbstractCegarLoop]: Abstraction has 690 states and 1161 transitions. [2020-10-27 01:40:17,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:40:17,085 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1161 transitions. [2020-10-27 01:40:17,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:40:17,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:17,086 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:17,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-27 01:40:17,086 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:17,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:17,086 INFO L82 PathProgramCache]: Analyzing trace with hash 548140018, now seen corresponding path program 11 times [2020-10-27 01:40:17,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:17,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1474009611] [2020-10-27 01:40:17,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:17,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:17,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:17,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:17,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:17,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:17,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:17,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:17,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:40:17,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:40:17,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 258 [2020-10-27 01:40:17,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:17,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:40:17,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:17,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:40:17,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:17,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:17,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:17,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:17,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:17,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:17,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:17,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:40:17,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:17,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:17,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:17,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:17,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:17,482 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:17,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1474009611] [2020-10-27 01:40:17,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:17,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:40:17,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386467265] [2020-10-27 01:40:17,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:40:17,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:17,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:40:17,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:40:17,484 INFO L87 Difference]: Start difference. First operand 690 states and 1161 transitions. Second operand 11 states. [2020-10-27 01:40:18,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:18,385 INFO L93 Difference]: Finished difference Result 745 states and 1236 transitions. [2020-10-27 01:40:18,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:40:18,385 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-27 01:40:18,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:18,390 INFO L225 Difference]: With dead ends: 745 [2020-10-27 01:40:18,391 INFO L226 Difference]: Without dead ends: 741 [2020-10-27 01:40:18,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:40:18,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2020-10-27 01:40:18,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 705. [2020-10-27 01:40:18,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 705 states. [2020-10-27 01:40:18,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 1187 transitions. [2020-10-27 01:40:18,448 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 1187 transitions. Word has length 30 [2020-10-27 01:40:18,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:18,448 INFO L481 AbstractCegarLoop]: Abstraction has 705 states and 1187 transitions. [2020-10-27 01:40:18,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:40:18,448 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 1187 transitions. [2020-10-27 01:40:18,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:40:18,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:18,449 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:18,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-27 01:40:18,449 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:18,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:18,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1172212832, now seen corresponding path program 12 times [2020-10-27 01:40:18,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:18,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443359716] [2020-10-27 01:40:18,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:18,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:18,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:18,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:18,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:18,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:18,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:18,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:18,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:40:18,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:40:18,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 287 [2020-10-27 01:40:18,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:18,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:40:18,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:18,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:40:18,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:18,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:18,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:18,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:18,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:18,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:18,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:18,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:40:18,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:18,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:18,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:18,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:18,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:18,872 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:18,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443359716] [2020-10-27 01:40:18,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:18,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:40:18,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934282381] [2020-10-27 01:40:18,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:40:18,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:18,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:40:18,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:40:18,874 INFO L87 Difference]: Start difference. First operand 705 states and 1187 transitions. Second operand 11 states. [2020-10-27 01:40:19,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:19,790 INFO L93 Difference]: Finished difference Result 766 states and 1272 transitions. [2020-10-27 01:40:19,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:40:19,791 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-27 01:40:19,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:19,795 INFO L225 Difference]: With dead ends: 766 [2020-10-27 01:40:19,795 INFO L226 Difference]: Without dead ends: 762 [2020-10-27 01:40:19,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:40:19,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2020-10-27 01:40:19,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 725. [2020-10-27 01:40:19,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 725 states. [2020-10-27 01:40:19,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 1221 transitions. [2020-10-27 01:40:19,887 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 1221 transitions. Word has length 30 [2020-10-27 01:40:19,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:19,888 INFO L481 AbstractCegarLoop]: Abstraction has 725 states and 1221 transitions. [2020-10-27 01:40:19,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:40:19,888 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 1221 transitions. [2020-10-27 01:40:19,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:40:19,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:19,889 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:19,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-27 01:40:19,890 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:19,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:19,890 INFO L82 PathProgramCache]: Analyzing trace with hash 585406818, now seen corresponding path program 14 times [2020-10-27 01:40:19,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:19,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1033249079] [2020-10-27 01:40:19,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:19,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:19,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:19,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:19,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:19,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:19,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:20,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:20,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:40:20,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:40:20,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 364 [2020-10-27 01:40:20,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:20,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:40:20,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:20,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:40:20,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:20,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:20,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:20,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:20,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:20,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:20,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:20,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:40:20,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:20,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:20,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:20,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:20,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:20,386 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:20,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1033249079] [2020-10-27 01:40:20,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:20,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:40:20,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442010464] [2020-10-27 01:40:20,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:40:20,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:20,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:40:20,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:40:20,388 INFO L87 Difference]: Start difference. First operand 725 states and 1221 transitions. Second operand 11 states. [2020-10-27 01:40:21,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:21,322 INFO L93 Difference]: Finished difference Result 795 states and 1320 transitions. [2020-10-27 01:40:21,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:40:21,322 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-27 01:40:21,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:21,327 INFO L225 Difference]: With dead ends: 795 [2020-10-27 01:40:21,327 INFO L226 Difference]: Without dead ends: 791 [2020-10-27 01:40:21,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:40:21,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2020-10-27 01:40:21,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 747. [2020-10-27 01:40:21,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 747 states. [2020-10-27 01:40:21,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 1259 transitions. [2020-10-27 01:40:21,382 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 1259 transitions. Word has length 30 [2020-10-27 01:40:21,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:21,383 INFO L481 AbstractCegarLoop]: Abstraction has 747 states and 1259 transitions. [2020-10-27 01:40:21,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:40:21,383 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 1259 transitions. [2020-10-27 01:40:21,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:40:21,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:21,384 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:21,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-27 01:40:21,384 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:21,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:21,384 INFO L82 PathProgramCache]: Analyzing trace with hash -750000190, now seen corresponding path program 15 times [2020-10-27 01:40:21,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:21,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1076350679] [2020-10-27 01:40:21,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:21,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:21,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:21,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:21,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:21,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:21,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:21,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:21,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:40:21,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:40:21,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 279 [2020-10-27 01:40:21,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:21,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:40:21,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:21,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:40:21,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:21,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:21,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:21,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:21,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:21,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:21,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:21,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:40:21,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:21,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:21,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:21,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:21,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:21,799 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:21,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1076350679] [2020-10-27 01:40:21,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:21,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:40:21,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690503140] [2020-10-27 01:40:21,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:40:21,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:21,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:40:21,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:40:21,801 INFO L87 Difference]: Start difference. First operand 747 states and 1259 transitions. Second operand 11 states. [2020-10-27 01:40:22,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:22,786 INFO L93 Difference]: Finished difference Result 814 states and 1353 transitions. [2020-10-27 01:40:22,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:40:22,787 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-27 01:40:22,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:22,792 INFO L225 Difference]: With dead ends: 814 [2020-10-27 01:40:22,792 INFO L226 Difference]: Without dead ends: 810 [2020-10-27 01:40:22,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:40:22,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2020-10-27 01:40:22,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 766. [2020-10-27 01:40:22,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 766 states. [2020-10-27 01:40:22,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 1292 transitions. [2020-10-27 01:40:22,849 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 1292 transitions. Word has length 30 [2020-10-27 01:40:22,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:22,849 INFO L481 AbstractCegarLoop]: Abstraction has 766 states and 1292 transitions. [2020-10-27 01:40:22,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:40:22,849 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 1292 transitions. [2020-10-27 01:40:22,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:40:22,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:22,850 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:22,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-27 01:40:22,851 INFO L429 AbstractCegarLoop]: === Iteration 61 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:22,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:22,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1143027200, now seen corresponding path program 13 times [2020-10-27 01:40:22,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:22,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650656153] [2020-10-27 01:40:22,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:22,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:22,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:22,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:22,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:22,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:22,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:23,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:23,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:40:23,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:40:23,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 309 [2020-10-27 01:40:23,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:23,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:40:23,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:23,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:40:23,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:23,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:23,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:23,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:23,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:23,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:23,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:23,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:40:23,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:23,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:23,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:23,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:23,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:23,292 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:23,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650656153] [2020-10-27 01:40:23,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:23,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:40:23,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964257447] [2020-10-27 01:40:23,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:40:23,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:23,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:40:23,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:40:23,293 INFO L87 Difference]: Start difference. First operand 766 states and 1292 transitions. Second operand 11 states. [2020-10-27 01:40:24,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:24,197 INFO L93 Difference]: Finished difference Result 820 states and 1365 transitions. [2020-10-27 01:40:24,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:40:24,198 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-27 01:40:24,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:24,203 INFO L225 Difference]: With dead ends: 820 [2020-10-27 01:40:24,204 INFO L226 Difference]: Without dead ends: 816 [2020-10-27 01:40:24,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:40:24,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2020-10-27 01:40:24,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 780. [2020-10-27 01:40:24,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 780 states. [2020-10-27 01:40:24,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 1316 transitions. [2020-10-27 01:40:24,263 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 1316 transitions. Word has length 30 [2020-10-27 01:40:24,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:24,264 INFO L481 AbstractCegarLoop]: Abstraction has 780 states and 1316 transitions. [2020-10-27 01:40:24,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:40:24,264 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 1316 transitions. [2020-10-27 01:40:24,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:40:24,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:24,265 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:24,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-27 01:40:24,266 INFO L429 AbstractCegarLoop]: === Iteration 62 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:24,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:24,266 INFO L82 PathProgramCache]: Analyzing trace with hash -712733390, now seen corresponding path program 14 times [2020-10-27 01:40:24,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:24,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1302877526] [2020-10-27 01:40:24,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:24,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:24,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:24,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:24,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:24,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:24,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:24,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:24,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:40:24,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:40:24,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 272 [2020-10-27 01:40:24,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:24,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:40:24,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:24,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:40:24,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:24,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:24,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:24,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:24,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:24,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:24,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:24,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:40:24,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:24,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:24,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:24,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:24,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:24,676 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:24,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1302877526] [2020-10-27 01:40:24,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:24,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:40:24,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601576153] [2020-10-27 01:40:24,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:40:24,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:24,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:40:24,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:40:24,677 INFO L87 Difference]: Start difference. First operand 780 states and 1316 transitions. Second operand 11 states. [2020-10-27 01:40:25,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:25,604 INFO L93 Difference]: Finished difference Result 838 states and 1396 transitions. [2020-10-27 01:40:25,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:40:25,605 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-27 01:40:25,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:25,610 INFO L225 Difference]: With dead ends: 838 [2020-10-27 01:40:25,610 INFO L226 Difference]: Without dead ends: 834 [2020-10-27 01:40:25,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:40:25,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2020-10-27 01:40:25,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 797. [2020-10-27 01:40:25,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 797 states. [2020-10-27 01:40:25,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 1345 transitions. [2020-10-27 01:40:25,672 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 1345 transitions. Word has length 30 [2020-10-27 01:40:25,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:25,672 INFO L481 AbstractCegarLoop]: Abstraction has 797 states and 1345 transitions. [2020-10-27 01:40:25,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:40:25,672 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 1345 transitions. [2020-10-27 01:40:25,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:40:25,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:25,673 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:25,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-27 01:40:25,674 INFO L429 AbstractCegarLoop]: === Iteration 63 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:25,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:25,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1286149886, now seen corresponding path program 16 times [2020-10-27 01:40:25,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:25,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1606567132] [2020-10-27 01:40:25,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:25,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:25,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:25,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:25,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:25,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:25,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:26,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:26,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:40:26,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:40:26,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 359 [2020-10-27 01:40:26,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:26,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:40:26,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:26,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:40:26,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:26,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:26,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:26,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:26,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:26,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:26,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:26,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:40:26,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:26,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:26,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:26,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:26,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:26,165 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:26,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1606567132] [2020-10-27 01:40:26,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:26,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:40:26,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537914540] [2020-10-27 01:40:26,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:40:26,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:26,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:40:26,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:40:26,167 INFO L87 Difference]: Start difference. First operand 797 states and 1345 transitions. Second operand 11 states. [2020-10-27 01:40:27,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:27,145 INFO L93 Difference]: Finished difference Result 878 states and 1461 transitions. [2020-10-27 01:40:27,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:40:27,145 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-27 01:40:27,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:27,149 INFO L225 Difference]: With dead ends: 878 [2020-10-27 01:40:27,149 INFO L226 Difference]: Without dead ends: 874 [2020-10-27 01:40:27,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:40:27,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2020-10-27 01:40:27,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 826. [2020-10-27 01:40:27,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 826 states. [2020-10-27 01:40:27,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1395 transitions. [2020-10-27 01:40:27,215 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1395 transitions. Word has length 30 [2020-10-27 01:40:27,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:27,216 INFO L481 AbstractCegarLoop]: Abstraction has 826 states and 1395 transitions. [2020-10-27 01:40:27,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:40:27,216 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1395 transitions. [2020-10-27 01:40:27,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:40:27,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:27,218 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:27,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-27 01:40:27,218 INFO L429 AbstractCegarLoop]: === Iteration 64 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:27,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:27,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1902091390, now seen corresponding path program 1 times [2020-10-27 01:40:27,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:27,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [151440321] [2020-10-27 01:40:27,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:27,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:27,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:27,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:27,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:27,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:27,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:27,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:27,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:40:27,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:40:27,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 363 [2020-10-27 01:40:27,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:27,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:40:27,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:27,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:40:27,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:27,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:27,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:27,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:27,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:27,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:27,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:27,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:40:27,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:27,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:27,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:27,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:27,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:27,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-27 01:40:27,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:27,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:27,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:27,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:40:27,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:27,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:40:27,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:27,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:40:27,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:27,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:40:27,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:27,695 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:27,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [151440321] [2020-10-27 01:40:27,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:27,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:40:27,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822487245] [2020-10-27 01:40:27,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:40:27,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:27,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:40:27,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:40:27,697 INFO L87 Difference]: Start difference. First operand 826 states and 1395 transitions. Second operand 10 states. [2020-10-27 01:40:28,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:28,394 INFO L93 Difference]: Finished difference Result 859 states and 1432 transitions. [2020-10-27 01:40:28,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:40:28,394 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-10-27 01:40:28,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:28,397 INFO L225 Difference]: With dead ends: 859 [2020-10-27 01:40:28,397 INFO L226 Difference]: Without dead ends: 855 [2020-10-27 01:40:28,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:40:28,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2020-10-27 01:40:28,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 826. [2020-10-27 01:40:28,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 826 states. [2020-10-27 01:40:28,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1395 transitions. [2020-10-27 01:40:28,464 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1395 transitions. Word has length 31 [2020-10-27 01:40:28,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:28,464 INFO L481 AbstractCegarLoop]: Abstraction has 826 states and 1395 transitions. [2020-10-27 01:40:28,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:40:28,464 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1395 transitions. [2020-10-27 01:40:28,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:40:28,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:28,466 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:28,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-27 01:40:28,466 INFO L429 AbstractCegarLoop]: === Iteration 65 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:28,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:28,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1987749056, now seen corresponding path program 15 times [2020-10-27 01:40:28,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:28,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [227775146] [2020-10-27 01:40:28,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:28,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:28,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:28,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:28,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:28,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:28,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:28,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:28,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:40:28,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:40:28,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 336 [2020-10-27 01:40:28,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:28,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:40:28,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:28,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:40:28,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:28,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:28,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:28,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:28,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:28,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:28,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:28,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:40:28,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:28,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:28,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:28,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:28,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:28,935 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:28,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [227775146] [2020-10-27 01:40:28,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:28,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:40:28,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385001282] [2020-10-27 01:40:28,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:40:28,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:28,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:40:28,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:40:28,936 INFO L87 Difference]: Start difference. First operand 826 states and 1395 transitions. Second operand 11 states. [2020-10-27 01:40:29,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:29,858 INFO L93 Difference]: Finished difference Result 884 states and 1475 transitions. [2020-10-27 01:40:29,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:40:29,859 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-27 01:40:29,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:29,861 INFO L225 Difference]: With dead ends: 884 [2020-10-27 01:40:29,861 INFO L226 Difference]: Without dead ends: 880 [2020-10-27 01:40:29,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:40:29,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2020-10-27 01:40:29,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 843. [2020-10-27 01:40:29,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 843 states. [2020-10-27 01:40:29,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1424 transitions. [2020-10-27 01:40:29,937 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1424 transitions. Word has length 30 [2020-10-27 01:40:29,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:29,938 INFO L481 AbstractCegarLoop]: Abstraction has 843 states and 1424 transitions. [2020-10-27 01:40:29,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:40:29,938 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1424 transitions. [2020-10-27 01:40:29,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:40:29,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:29,939 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:29,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-27 01:40:29,939 INFO L429 AbstractCegarLoop]: === Iteration 66 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:29,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:29,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1567648640, now seen corresponding path program 16 times [2020-10-27 01:40:29,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:29,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1631534852] [2020-10-27 01:40:29,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:29,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:29,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:29,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:29,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:29,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:30,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:30,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:30,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:40:30,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:40:30,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 319 [2020-10-27 01:40:30,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:30,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:40:30,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:30,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:40:30,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:30,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:30,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:30,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:30,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:30,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:30,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:30,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:40:30,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:30,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:30,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:30,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:30,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:30,392 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:30,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1631534852] [2020-10-27 01:40:30,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:30,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:40:30,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849604887] [2020-10-27 01:40:30,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:40:30,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:30,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:40:30,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:40:30,394 INFO L87 Difference]: Start difference. First operand 843 states and 1424 transitions. Second operand 11 states. [2020-10-27 01:40:31,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:31,324 INFO L93 Difference]: Finished difference Result 898 states and 1499 transitions. [2020-10-27 01:40:31,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:40:31,325 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-27 01:40:31,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:31,327 INFO L225 Difference]: With dead ends: 898 [2020-10-27 01:40:31,327 INFO L226 Difference]: Without dead ends: 894 [2020-10-27 01:40:31,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:40:31,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2020-10-27 01:40:31,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 858. [2020-10-27 01:40:31,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 858 states. [2020-10-27 01:40:31,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 1450 transitions. [2020-10-27 01:40:31,393 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 1450 transitions. Word has length 30 [2020-10-27 01:40:31,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:31,393 INFO L481 AbstractCegarLoop]: Abstraction has 858 states and 1450 transitions. [2020-10-27 01:40:31,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:40:31,393 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 1450 transitions. [2020-10-27 01:40:31,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:40:31,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:31,395 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:31,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-27 01:40:31,395 INFO L429 AbstractCegarLoop]: === Iteration 67 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:31,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:31,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1960675650, now seen corresponding path program 15 times [2020-10-27 01:40:31,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:31,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1514467728] [2020-10-27 01:40:31,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:31,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:31,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:31,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:31,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:31,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:31,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:31,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:31,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:40:31,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:40:31,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 318 [2020-10-27 01:40:31,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:31,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:40:31,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:31,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:40:31,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:31,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:31,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:31,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:31,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:31,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:31,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:31,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:40:31,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:31,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:31,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:31,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:31,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:31,852 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:31,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1514467728] [2020-10-27 01:40:31,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:31,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:40:31,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623229195] [2020-10-27 01:40:31,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:40:31,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:31,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:40:31,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:40:31,853 INFO L87 Difference]: Start difference. First operand 858 states and 1450 transitions. Second operand 11 states. [2020-10-27 01:40:32,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:32,844 INFO L93 Difference]: Finished difference Result 924 states and 1542 transitions. [2020-10-27 01:40:32,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:40:32,845 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-27 01:40:32,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:32,847 INFO L225 Difference]: With dead ends: 924 [2020-10-27 01:40:32,847 INFO L226 Difference]: Without dead ends: 920 [2020-10-27 01:40:32,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:40:32,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2020-10-27 01:40:32,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 876. [2020-10-27 01:40:32,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 876 states. [2020-10-27 01:40:32,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 1481 transitions. [2020-10-27 01:40:32,912 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 1481 transitions. Word has length 30 [2020-10-27 01:40:32,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:32,912 INFO L481 AbstractCegarLoop]: Abstraction has 876 states and 1481 transitions. [2020-10-27 01:40:32,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:40:32,912 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 1481 transitions. [2020-10-27 01:40:32,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:40:32,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:32,914 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:32,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-27 01:40:32,914 INFO L429 AbstractCegarLoop]: === Iteration 68 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:32,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:32,915 INFO L82 PathProgramCache]: Analyzing trace with hash -943575826, now seen corresponding path program 17 times [2020-10-27 01:40:32,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:32,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2094105984] [2020-10-27 01:40:32,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:32,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:32,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:32,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:32,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:32,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:32,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:33,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:33,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:40:33,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:40:33,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 389 [2020-10-27 01:40:33,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:33,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:40:33,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:33,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:40:33,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:33,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:33,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:33,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:33,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:33,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:33,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:33,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:40:33,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:33,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:33,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:33,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:33,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:33,440 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:33,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2094105984] [2020-10-27 01:40:33,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:33,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:40:33,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905317437] [2020-10-27 01:40:33,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:40:33,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:33,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:40:33,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:40:33,442 INFO L87 Difference]: Start difference. First operand 876 states and 1481 transitions. Second operand 11 states. [2020-10-27 01:40:34,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:34,377 INFO L93 Difference]: Finished difference Result 934 states and 1561 transitions. [2020-10-27 01:40:34,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:40:34,378 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-27 01:40:34,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:34,381 INFO L225 Difference]: With dead ends: 934 [2020-10-27 01:40:34,381 INFO L226 Difference]: Without dead ends: 930 [2020-10-27 01:40:34,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:40:34,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2020-10-27 01:40:34,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 893. [2020-10-27 01:40:34,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 893 states. [2020-10-27 01:40:34,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1510 transitions. [2020-10-27 01:40:34,454 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1510 transitions. Word has length 30 [2020-10-27 01:40:34,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:34,454 INFO L481 AbstractCegarLoop]: Abstraction has 893 states and 1510 transitions. [2020-10-27 01:40:34,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:40:34,454 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1510 transitions. [2020-10-27 01:40:34,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:40:34,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:34,455 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:34,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-27 01:40:34,455 INFO L429 AbstractCegarLoop]: === Iteration 69 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:34,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:34,456 INFO L82 PathProgramCache]: Analyzing trace with hash 108958338, now seen corresponding path program 2 times [2020-10-27 01:40:34,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:34,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1027816037] [2020-10-27 01:40:34,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:34,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:34,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:34,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:34,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:34,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:34,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:34,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:34,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:40:34,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:40:34,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 356 [2020-10-27 01:40:34,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:34,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:40:34,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:34,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:40:34,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:34,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:34,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:34,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:34,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:34,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:34,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:34,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:40:34,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:34,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:34,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:34,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:34,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:34,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-27 01:40:34,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:34,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:34,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:34,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:40:34,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:34,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:40:34,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:34,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:40:34,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:34,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:40:34,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:34,924 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:34,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1027816037] [2020-10-27 01:40:34,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:34,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:40:34,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235397957] [2020-10-27 01:40:34,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:40:34,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:34,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:40:34,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:40:34,926 INFO L87 Difference]: Start difference. First operand 893 states and 1510 transitions. Second operand 10 states. [2020-10-27 01:40:35,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:35,615 INFO L93 Difference]: Finished difference Result 926 states and 1547 transitions. [2020-10-27 01:40:35,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:40:35,616 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-10-27 01:40:35,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:35,619 INFO L225 Difference]: With dead ends: 926 [2020-10-27 01:40:35,619 INFO L226 Difference]: Without dead ends: 922 [2020-10-27 01:40:35,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:40:35,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2020-10-27 01:40:35,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 893. [2020-10-27 01:40:35,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 893 states. [2020-10-27 01:40:35,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1510 transitions. [2020-10-27 01:40:35,725 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1510 transitions. Word has length 31 [2020-10-27 01:40:35,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:35,725 INFO L481 AbstractCegarLoop]: Abstraction has 893 states and 1510 transitions. [2020-10-27 01:40:35,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:40:35,726 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1510 transitions. [2020-10-27 01:40:35,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:40:35,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:35,727 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:35,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-27 01:40:35,727 INFO L429 AbstractCegarLoop]: === Iteration 70 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:35,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:35,728 INFO L82 PathProgramCache]: Analyzing trace with hash -2103798336, now seen corresponding path program 18 times [2020-10-27 01:40:35,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:35,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [49167581] [2020-10-27 01:40:35,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:35,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:35,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:35,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:35,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:35,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:35,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:36,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:36,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:40:36,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:40:36,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 310 [2020-10-27 01:40:36,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:36,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:40:36,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:36,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:40:36,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:36,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:36,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:36,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:36,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:36,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:36,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:36,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:40:36,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:36,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:36,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:36,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:36,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:36,177 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:36,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [49167581] [2020-10-27 01:40:36,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:36,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:40:36,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908594479] [2020-10-27 01:40:36,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:40:36,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:36,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:40:36,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:40:36,179 INFO L87 Difference]: Start difference. First operand 893 states and 1510 transitions. Second operand 11 states. [2020-10-27 01:40:37,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:37,116 INFO L93 Difference]: Finished difference Result 951 states and 1590 transitions. [2020-10-27 01:40:37,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:40:37,117 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-27 01:40:37,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:37,119 INFO L225 Difference]: With dead ends: 951 [2020-10-27 01:40:37,119 INFO L226 Difference]: Without dead ends: 947 [2020-10-27 01:40:37,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:40:37,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2020-10-27 01:40:37,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 910. [2020-10-27 01:40:37,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 910 states. [2020-10-27 01:40:37,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 1539 transitions. [2020-10-27 01:40:37,199 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 1539 transitions. Word has length 30 [2020-10-27 01:40:37,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:37,199 INFO L481 AbstractCegarLoop]: Abstraction has 910 states and 1539 transitions. [2020-10-27 01:40:37,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:40:37,200 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 1539 transitions. [2020-10-27 01:40:37,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:40:37,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:37,201 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:37,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-10-27 01:40:37,201 INFO L429 AbstractCegarLoop]: === Iteration 71 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:37,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:37,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1170100606, now seen corresponding path program 16 times [2020-10-27 01:40:37,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:37,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [14433388] [2020-10-27 01:40:37,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:37,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:37,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:37,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:37,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:37,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:37,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:37,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:37,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:40:37,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:40:37,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 266 [2020-10-27 01:40:37,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:37,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:40:37,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:37,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:40:37,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:37,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:37,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:37,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:37,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:37,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:37,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:37,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:40:37,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:37,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:37,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:37,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:37,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:37,601 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:37,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [14433388] [2020-10-27 01:40:37,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:37,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:40:37,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805401382] [2020-10-27 01:40:37,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:40:37,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:37,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:40:37,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:40:37,602 INFO L87 Difference]: Start difference. First operand 910 states and 1539 transitions. Second operand 11 states. [2020-10-27 01:40:38,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:38,598 INFO L93 Difference]: Finished difference Result 991 states and 1655 transitions. [2020-10-27 01:40:38,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:40:38,599 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-27 01:40:38,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:38,602 INFO L225 Difference]: With dead ends: 991 [2020-10-27 01:40:38,602 INFO L226 Difference]: Without dead ends: 987 [2020-10-27 01:40:38,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:40:38,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2020-10-27 01:40:38,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 939. [2020-10-27 01:40:38,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 939 states. [2020-10-27 01:40:38,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 1589 transitions. [2020-10-27 01:40:38,671 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 1589 transitions. Word has length 30 [2020-10-27 01:40:38,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:38,671 INFO L481 AbstractCegarLoop]: Abstraction has 939 states and 1589 transitions. [2020-10-27 01:40:38,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:40:38,671 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 1589 transitions. [2020-10-27 01:40:38,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:40:38,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:38,672 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:38,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-10-27 01:40:38,672 INFO L429 AbstractCegarLoop]: === Iteration 72 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:38,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:38,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1488692929, now seen corresponding path program 2 times [2020-10-27 01:40:38,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:38,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [82042716] [2020-10-27 01:40:38,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:38,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:38,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:38,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:38,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:38,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:38,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:39,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:39,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:40:39,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:40:39,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 474 [2020-10-27 01:40:39,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:39,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:40:39,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:39,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 01:40:39,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:39,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:39,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:39,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:39,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:39,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:39,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:39,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:40:39,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:39,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:39,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:39,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:39,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:39,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-27 01:40:39,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:39,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:39,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:39,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:40:39,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:39,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:40:39,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:39,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:40:39,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:39,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:40:39,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:39,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-27 01:40:39,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:39,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:39,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:39,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:40:39,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:39,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:40:39,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:39,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:40:39,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:39,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:40:39,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:39,266 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 01:40:39,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [82042716] [2020-10-27 01:40:39,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:39,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:40:39,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2911069] [2020-10-27 01:40:39,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:40:39,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:39,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:40:39,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:40:39,267 INFO L87 Difference]: Start difference. First operand 939 states and 1589 transitions. Second operand 10 states. [2020-10-27 01:40:39,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:39,918 INFO L93 Difference]: Finished difference Result 969 states and 1621 transitions. [2020-10-27 01:40:39,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:40:39,919 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-10-27 01:40:39,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:39,922 INFO L225 Difference]: With dead ends: 969 [2020-10-27 01:40:39,922 INFO L226 Difference]: Without dead ends: 965 [2020-10-27 01:40:39,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:40:39,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2020-10-27 01:40:40,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 947. [2020-10-27 01:40:40,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 947 states. [2020-10-27 01:40:40,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 1597 transitions. [2020-10-27 01:40:40,062 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 1597 transitions. Word has length 33 [2020-10-27 01:40:40,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:40,062 INFO L481 AbstractCegarLoop]: Abstraction has 947 states and 1597 transitions. [2020-10-27 01:40:40,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:40:40,062 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 1597 transitions. [2020-10-27 01:40:40,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:40:40,063 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:40,063 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:40,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-10-27 01:40:40,064 INFO L429 AbstractCegarLoop]: === Iteration 73 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:40,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:40,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1089111572, now seen corresponding path program 17 times [2020-10-27 01:40:40,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:40,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729877984] [2020-10-27 01:40:40,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:40,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:40,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:40,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:40,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:40,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:40,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:40,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:40,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:40:40,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:40:40,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 289 [2020-10-27 01:40:40,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:40,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:40:40,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:40,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:40:40,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:40,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:40,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:40,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:40,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:40,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:40,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:40,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:40:40,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:40,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:40,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:40,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:40,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:40,489 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:40,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [729877984] [2020-10-27 01:40:40,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:40,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:40:40,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473585053] [2020-10-27 01:40:40,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:40:40,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:40,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:40:40,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:40:40,491 INFO L87 Difference]: Start difference. First operand 947 states and 1597 transitions. Second operand 11 states. [2020-10-27 01:40:41,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:41,427 INFO L93 Difference]: Finished difference Result 1001 states and 1670 transitions. [2020-10-27 01:40:41,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:40:41,427 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-27 01:40:41,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:41,429 INFO L225 Difference]: With dead ends: 1001 [2020-10-27 01:40:41,429 INFO L226 Difference]: Without dead ends: 997 [2020-10-27 01:40:41,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:40:41,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2020-10-27 01:40:41,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 962. [2020-10-27 01:40:41,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 962 states. [2020-10-27 01:40:41,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 962 states to 962 states and 1623 transitions. [2020-10-27 01:40:41,523 INFO L78 Accepts]: Start accepts. Automaton has 962 states and 1623 transitions. Word has length 31 [2020-10-27 01:40:41,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:41,523 INFO L481 AbstractCegarLoop]: Abstraction has 962 states and 1623 transitions. [2020-10-27 01:40:41,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:40:41,523 INFO L276 IsEmpty]: Start isEmpty. Operand 962 states and 1623 transitions. [2020-10-27 01:40:41,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:40:41,525 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:41,525 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:41,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-10-27 01:40:41,525 INFO L429 AbstractCegarLoop]: === Iteration 74 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:41,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:41,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1482138582, now seen corresponding path program 19 times [2020-10-27 01:40:41,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:41,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [101102470] [2020-10-27 01:40:41,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:41,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:41,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:41,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:41,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:41,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:41,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:41,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:41,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:40:41,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:40:41,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 258 [2020-10-27 01:40:41,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:41,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:40:41,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:41,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:40:41,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:41,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:41,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:41,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:41,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:41,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:41,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:41,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:40:41,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:41,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:41,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:41,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:41,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:41,923 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:41,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [101102470] [2020-10-27 01:40:41,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:41,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:40:41,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670500330] [2020-10-27 01:40:41,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:40:41,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:41,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:40:41,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:40:41,924 INFO L87 Difference]: Start difference. First operand 962 states and 1623 transitions. Second operand 11 states. [2020-10-27 01:40:42,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:42,866 INFO L93 Difference]: Finished difference Result 1017 states and 1698 transitions. [2020-10-27 01:40:42,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:40:42,867 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-27 01:40:42,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:42,869 INFO L225 Difference]: With dead ends: 1017 [2020-10-27 01:40:42,870 INFO L226 Difference]: Without dead ends: 1013 [2020-10-27 01:40:42,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:40:42,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2020-10-27 01:40:42,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 978. [2020-10-27 01:40:42,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 978 states. [2020-10-27 01:40:42,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 1651 transitions. [2020-10-27 01:40:42,998 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 1651 transitions. Word has length 31 [2020-10-27 01:40:42,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:42,999 INFO L481 AbstractCegarLoop]: Abstraction has 978 states and 1651 transitions. [2020-10-27 01:40:42,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:40:42,999 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 1651 transitions. [2020-10-27 01:40:43,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:40:43,000 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:43,001 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:43,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-10-27 01:40:43,001 INFO L429 AbstractCegarLoop]: === Iteration 75 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:43,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:43,001 INFO L82 PathProgramCache]: Analyzing trace with hash -2100228822, now seen corresponding path program 20 times [2020-10-27 01:40:43,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:43,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [772542433] [2020-10-27 01:40:43,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:43,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:43,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:43,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:43,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:43,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:43,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:43,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:43,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:40:43,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:40:43,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 358 [2020-10-27 01:40:43,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:43,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:40:43,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:43,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:40:43,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:43,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:43,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:43,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:43,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:43,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:43,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:43,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:40:43,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:43,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:43,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:43,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:43,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:43,494 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:43,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [772542433] [2020-10-27 01:40:43,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:43,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:40:43,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997835547] [2020-10-27 01:40:43,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:40:43,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:43,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:40:43,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:40:43,497 INFO L87 Difference]: Start difference. First operand 978 states and 1651 transitions. Second operand 11 states. [2020-10-27 01:40:44,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:44,454 INFO L93 Difference]: Finished difference Result 1032 states and 1724 transitions. [2020-10-27 01:40:44,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:40:44,455 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-27 01:40:44,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:44,458 INFO L225 Difference]: With dead ends: 1032 [2020-10-27 01:40:44,458 INFO L226 Difference]: Without dead ends: 1028 [2020-10-27 01:40:44,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:40:44,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2020-10-27 01:40:44,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 993. [2020-10-27 01:40:44,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 993 states. [2020-10-27 01:40:44,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 1677 transitions. [2020-10-27 01:40:44,542 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 1677 transitions. Word has length 31 [2020-10-27 01:40:44,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:44,542 INFO L481 AbstractCegarLoop]: Abstraction has 993 states and 1677 transitions. [2020-10-27 01:40:44,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:40:44,542 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 1677 transitions. [2020-10-27 01:40:44,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:40:44,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:44,543 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:44,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2020-10-27 01:40:44,543 INFO L429 AbstractCegarLoop]: === Iteration 76 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:44,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:44,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1801711464, now seen corresponding path program 21 times [2020-10-27 01:40:44,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:44,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [390636242] [2020-10-27 01:40:44,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:44,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:44,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:44,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:44,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:44,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:44,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:44,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:44,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:40:44,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:40:44,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 240 [2020-10-27 01:40:44,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:44,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:40:44,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:44,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:40:44,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:44,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:44,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:44,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:44,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:44,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:44,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:44,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:40:44,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:44,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:44,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:44,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:44,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:44,915 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:44,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [390636242] [2020-10-27 01:40:44,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:44,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:40:44,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417318943] [2020-10-27 01:40:44,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:40:44,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:44,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:40:44,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:40:44,916 INFO L87 Difference]: Start difference. First operand 993 states and 1677 transitions. Second operand 11 states. [2020-10-27 01:40:45,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:45,869 INFO L93 Difference]: Finished difference Result 1048 states and 1752 transitions. [2020-10-27 01:40:45,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:40:45,870 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-27 01:40:45,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:45,872 INFO L225 Difference]: With dead ends: 1048 [2020-10-27 01:40:45,873 INFO L226 Difference]: Without dead ends: 1044 [2020-10-27 01:40:45,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:40:45,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2020-10-27 01:40:45,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 1009. [2020-10-27 01:40:45,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1009 states. [2020-10-27 01:40:45,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 1705 transitions. [2020-10-27 01:40:45,973 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 1705 transitions. Word has length 31 [2020-10-27 01:40:45,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:45,973 INFO L481 AbstractCegarLoop]: Abstraction has 1009 states and 1705 transitions. [2020-10-27 01:40:45,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:40:45,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 1705 transitions. [2020-10-27 01:40:45,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:40:45,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:45,974 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:45,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2020-10-27 01:40:45,974 INFO L429 AbstractCegarLoop]: === Iteration 77 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:45,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:45,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1211711018, now seen corresponding path program 22 times [2020-10-27 01:40:45,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:45,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [5614378] [2020-10-27 01:40:45,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:45,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:45,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:46,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:46,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:46,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:46,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:46,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:46,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:40:46,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:40:46,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 283 [2020-10-27 01:40:46,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:46,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:40:46,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:46,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:40:46,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:46,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:46,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:46,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:46,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:46,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:46,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:46,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:40:46,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:46,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:46,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:46,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:46,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:46,390 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:46,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [5614378] [2020-10-27 01:40:46,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:46,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:40:46,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033734119] [2020-10-27 01:40:46,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:40:46,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:46,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:40:46,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:40:46,391 INFO L87 Difference]: Start difference. First operand 1009 states and 1705 transitions. Second operand 11 states. [2020-10-27 01:40:47,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:47,343 INFO L93 Difference]: Finished difference Result 1063 states and 1778 transitions. [2020-10-27 01:40:47,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:40:47,344 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-27 01:40:47,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:47,347 INFO L225 Difference]: With dead ends: 1063 [2020-10-27 01:40:47,347 INFO L226 Difference]: Without dead ends: 1059 [2020-10-27 01:40:47,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:40:47,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2020-10-27 01:40:47,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 1024. [2020-10-27 01:40:47,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1024 states. [2020-10-27 01:40:47,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1731 transitions. [2020-10-27 01:40:47,499 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1731 transitions. Word has length 31 [2020-10-27 01:40:47,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:47,499 INFO L481 AbstractCegarLoop]: Abstraction has 1024 states and 1731 transitions. [2020-10-27 01:40:47,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:40:47,499 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1731 transitions. [2020-10-27 01:40:47,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:40:47,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:47,502 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:47,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2020-10-27 01:40:47,502 INFO L429 AbstractCegarLoop]: === Iteration 78 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:47,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:47,502 INFO L82 PathProgramCache]: Analyzing trace with hash 818684008, now seen corresponding path program 23 times [2020-10-27 01:40:47,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:47,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1906317251] [2020-10-27 01:40:47,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:47,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:47,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:47,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:47,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:47,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:47,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:47,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:47,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:40:47,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:40:47,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 433 [2020-10-27 01:40:47,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:47,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:40:47,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:47,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:40:47,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:48,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:48,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:48,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:48,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:48,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:48,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:48,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:40:48,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:48,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:48,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:48,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:48,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:48,074 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:48,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1906317251] [2020-10-27 01:40:48,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:48,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:40:48,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812970856] [2020-10-27 01:40:48,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:40:48,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:48,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:40:48,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:40:48,076 INFO L87 Difference]: Start difference. First operand 1024 states and 1731 transitions. Second operand 11 states. [2020-10-27 01:40:49,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:49,195 INFO L93 Difference]: Finished difference Result 1079 states and 1806 transitions. [2020-10-27 01:40:49,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:40:49,196 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-27 01:40:49,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:49,198 INFO L225 Difference]: With dead ends: 1079 [2020-10-27 01:40:49,198 INFO L226 Difference]: Without dead ends: 1075 [2020-10-27 01:40:49,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:40:49,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2020-10-27 01:40:49,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 1040. [2020-10-27 01:40:49,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1040 states. [2020-10-27 01:40:49,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 1759 transitions. [2020-10-27 01:40:49,317 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 1759 transitions. Word has length 31 [2020-10-27 01:40:49,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:49,318 INFO L481 AbstractCegarLoop]: Abstraction has 1040 states and 1759 transitions. [2020-10-27 01:40:49,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:40:49,318 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 1759 transitions. [2020-10-27 01:40:49,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:40:49,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:49,320 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:49,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2020-10-27 01:40:49,320 INFO L429 AbstractCegarLoop]: === Iteration 79 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:49,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:49,320 INFO L82 PathProgramCache]: Analyzing trace with hash 200593768, now seen corresponding path program 24 times [2020-10-27 01:40:49,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:49,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [54257378] [2020-10-27 01:40:49,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:49,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:49,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:49,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:49,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:49,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:49,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:49,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:49,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:40:49,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:40:49,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 230 [2020-10-27 01:40:49,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:49,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:40:49,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:49,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:40:49,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:49,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:49,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:49,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:49,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:49,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:49,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:49,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:40:49,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:49,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:49,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:49,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:49,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:49,686 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:49,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [54257378] [2020-10-27 01:40:49,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:49,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:40:49,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290048925] [2020-10-27 01:40:49,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:40:49,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:49,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:40:49,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:40:49,687 INFO L87 Difference]: Start difference. First operand 1040 states and 1759 transitions. Second operand 11 states. [2020-10-27 01:40:50,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:50,644 INFO L93 Difference]: Finished difference Result 1094 states and 1832 transitions. [2020-10-27 01:40:50,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:40:50,645 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-27 01:40:50,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:50,648 INFO L225 Difference]: With dead ends: 1094 [2020-10-27 01:40:50,648 INFO L226 Difference]: Without dead ends: 1090 [2020-10-27 01:40:50,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:40:50,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2020-10-27 01:40:50,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 1055. [2020-10-27 01:40:50,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1055 states. [2020-10-27 01:40:50,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 1785 transitions. [2020-10-27 01:40:50,739 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 1785 transitions. Word has length 31 [2020-10-27 01:40:50,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:50,739 INFO L481 AbstractCegarLoop]: Abstraction has 1055 states and 1785 transitions. [2020-10-27 01:40:50,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:40:50,739 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 1785 transitions. [2020-10-27 01:40:50,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:40:50,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:50,740 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:50,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2020-10-27 01:40:50,740 INFO L429 AbstractCegarLoop]: === Iteration 80 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:50,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:50,741 INFO L82 PathProgramCache]: Analyzing trace with hash -192433242, now seen corresponding path program 17 times [2020-10-27 01:40:50,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:50,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1257356257] [2020-10-27 01:40:50,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:50,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:50,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:50,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:50,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:50,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:50,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:50,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:50,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:40:50,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:40:50,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 243 [2020-10-27 01:40:50,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:50,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:40:50,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:50,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:40:50,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:51,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:51,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:51,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:51,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:51,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:51,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:51,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:40:51,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:51,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:51,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:51,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:51,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:51,125 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:51,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1257356257] [2020-10-27 01:40:51,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:51,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:40:51,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149493005] [2020-10-27 01:40:51,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:40:51,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:51,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:40:51,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:40:51,126 INFO L87 Difference]: Start difference. First operand 1055 states and 1785 transitions. Second operand 11 states. [2020-10-27 01:40:52,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:52,082 INFO L93 Difference]: Finished difference Result 1110 states and 1860 transitions. [2020-10-27 01:40:52,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:40:52,083 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-27 01:40:52,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:52,087 INFO L225 Difference]: With dead ends: 1110 [2020-10-27 01:40:52,087 INFO L226 Difference]: Without dead ends: 1106 [2020-10-27 01:40:52,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:40:52,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2020-10-27 01:40:52,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 1071. [2020-10-27 01:40:52,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1071 states. [2020-10-27 01:40:52,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1071 states to 1071 states and 1813 transitions. [2020-10-27 01:40:52,239 INFO L78 Accepts]: Start accepts. Automaton has 1071 states and 1813 transitions. Word has length 31 [2020-10-27 01:40:52,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:52,239 INFO L481 AbstractCegarLoop]: Abstraction has 1071 states and 1813 transitions. [2020-10-27 01:40:52,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:40:52,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1071 states and 1813 transitions. [2020-10-27 01:40:52,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:40:52,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:52,241 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:52,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2020-10-27 01:40:52,242 INFO L429 AbstractCegarLoop]: === Iteration 81 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:52,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:52,242 INFO L82 PathProgramCache]: Analyzing trace with hash -375929766, now seen corresponding path program 18 times [2020-10-27 01:40:52,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:52,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377139523] [2020-10-27 01:40:52,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:52,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:52,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:52,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:52,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:52,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:52,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:52,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:52,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:40:52,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:40:52,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 303 [2020-10-27 01:40:52,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:52,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:40:52,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:52,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:40:52,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:52,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:52,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:52,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:52,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:52,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:52,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:52,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:40:52,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:52,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:52,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:52,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:52,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:52,680 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:52,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377139523] [2020-10-27 01:40:52,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:52,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:40:52,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771246541] [2020-10-27 01:40:52,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:40:52,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:52,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:40:52,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:40:52,681 INFO L87 Difference]: Start difference. First operand 1071 states and 1813 transitions. Second operand 11 states. [2020-10-27 01:40:53,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:53,645 INFO L93 Difference]: Finished difference Result 1125 states and 1886 transitions. [2020-10-27 01:40:53,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:40:53,646 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-27 01:40:53,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:53,649 INFO L225 Difference]: With dead ends: 1125 [2020-10-27 01:40:53,649 INFO L226 Difference]: Without dead ends: 1121 [2020-10-27 01:40:53,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:40:53,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1121 states. [2020-10-27 01:40:53,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1121 to 1086. [2020-10-27 01:40:53,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1086 states. [2020-10-27 01:40:53,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 1839 transitions. [2020-10-27 01:40:53,742 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 1839 transitions. Word has length 31 [2020-10-27 01:40:53,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:53,742 INFO L481 AbstractCegarLoop]: Abstraction has 1086 states and 1839 transitions. [2020-10-27 01:40:53,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:40:53,742 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 1839 transitions. [2020-10-27 01:40:53,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:40:53,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:53,743 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:53,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2020-10-27 01:40:53,744 INFO L429 AbstractCegarLoop]: === Iteration 82 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:53,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:53,744 INFO L82 PathProgramCache]: Analyzing trace with hash -768956776, now seen corresponding path program 25 times [2020-10-27 01:40:53,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:53,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [491855760] [2020-10-27 01:40:53,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:53,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:53,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:53,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:53,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:53,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:53,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:53,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:53,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:40:53,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:40:53,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 233 [2020-10-27 01:40:53,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:53,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:40:53,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:53,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:40:53,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:54,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:54,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:54,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:54,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:54,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:54,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:54,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:40:54,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:54,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:54,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:54,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:54,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:54,112 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:54,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [491855760] [2020-10-27 01:40:54,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:54,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:40:54,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600039347] [2020-10-27 01:40:54,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:40:54,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:54,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:40:54,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:40:54,113 INFO L87 Difference]: Start difference. First operand 1086 states and 1839 transitions. Second operand 11 states. [2020-10-27 01:40:55,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:55,098 INFO L93 Difference]: Finished difference Result 1140 states and 1912 transitions. [2020-10-27 01:40:55,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:40:55,099 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-27 01:40:55,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:55,102 INFO L225 Difference]: With dead ends: 1140 [2020-10-27 01:40:55,102 INFO L226 Difference]: Without dead ends: 1136 [2020-10-27 01:40:55,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:40:55,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2020-10-27 01:40:55,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 1101. [2020-10-27 01:40:55,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1101 states. [2020-10-27 01:40:55,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 1865 transitions. [2020-10-27 01:40:55,214 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 1865 transitions. Word has length 31 [2020-10-27 01:40:55,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:55,214 INFO L481 AbstractCegarLoop]: Abstraction has 1101 states and 1865 transitions. [2020-10-27 01:40:55,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:40:55,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 1865 transitions. [2020-10-27 01:40:55,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:40:55,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:55,216 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:55,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2020-10-27 01:40:55,216 INFO L429 AbstractCegarLoop]: === Iteration 83 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:55,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:55,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1387047016, now seen corresponding path program 26 times [2020-10-27 01:40:55,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:55,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1187375457] [2020-10-27 01:40:55,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:55,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:55,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:55,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:55,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:55,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:55,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:55,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:55,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:40:55,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:40:55,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 185 [2020-10-27 01:40:55,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:55,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:40:55,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:55,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:40:55,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:55,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:55,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:55,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:55,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:55,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:55,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:55,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:40:55,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:55,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:55,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:55,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:55,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:55,534 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:55,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1187375457] [2020-10-27 01:40:55,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:55,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:40:55,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452980111] [2020-10-27 01:40:55,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:40:55,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:55,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:40:55,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:40:55,536 INFO L87 Difference]: Start difference. First operand 1101 states and 1865 transitions. Second operand 11 states. [2020-10-27 01:40:56,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:56,542 INFO L93 Difference]: Finished difference Result 1159 states and 1945 transitions. [2020-10-27 01:40:56,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:40:56,543 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-27 01:40:56,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:56,547 INFO L225 Difference]: With dead ends: 1159 [2020-10-27 01:40:56,547 INFO L226 Difference]: Without dead ends: 1155 [2020-10-27 01:40:56,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:40:56,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2020-10-27 01:40:56,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 1120. [2020-10-27 01:40:56,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1120 states. [2020-10-27 01:40:56,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 1898 transitions. [2020-10-27 01:40:56,700 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 1898 transitions. Word has length 31 [2020-10-27 01:40:56,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:56,701 INFO L481 AbstractCegarLoop]: Abstraction has 1120 states and 1898 transitions. [2020-10-27 01:40:56,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:40:56,701 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 1898 transitions. [2020-10-27 01:40:56,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:40:56,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:56,703 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:56,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2020-10-27 01:40:56,703 INFO L429 AbstractCegarLoop]: === Iteration 84 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:56,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:56,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1780074026, now seen corresponding path program 27 times [2020-10-27 01:40:56,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:56,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [575063457] [2020-10-27 01:40:56,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:56,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:56,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:56,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:56,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:56,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:56,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:56,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:56,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:40:56,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:40:56,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 286 [2020-10-27 01:40:56,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:56,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:40:56,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:56,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:40:56,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:57,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:57,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:57,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:57,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:57,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:57,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:57,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:40:57,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:57,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:57,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:57,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:57,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:57,126 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:57,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [575063457] [2020-10-27 01:40:57,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:57,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:40:57,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074339582] [2020-10-27 01:40:57,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:40:57,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:57,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:40:57,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:40:57,128 INFO L87 Difference]: Start difference. First operand 1120 states and 1898 transitions. Second operand 11 states. [2020-10-27 01:40:58,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:58,130 INFO L93 Difference]: Finished difference Result 1174 states and 1971 transitions. [2020-10-27 01:40:58,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:40:58,131 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-27 01:40:58,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:58,134 INFO L225 Difference]: With dead ends: 1174 [2020-10-27 01:40:58,134 INFO L226 Difference]: Without dead ends: 1170 [2020-10-27 01:40:58,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:40:58,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2020-10-27 01:40:58,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 1135. [2020-10-27 01:40:58,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1135 states. [2020-10-27 01:40:58,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 1924 transitions. [2020-10-27 01:40:58,251 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 1924 transitions. Word has length 31 [2020-10-27 01:40:58,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:58,252 INFO L481 AbstractCegarLoop]: Abstraction has 1135 states and 1924 transitions. [2020-10-27 01:40:58,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:40:58,252 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 1924 transitions. [2020-10-27 01:40:58,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:40:58,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:58,253 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:58,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2020-10-27 01:40:58,253 INFO L429 AbstractCegarLoop]: === Iteration 85 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:58,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:58,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1983089208, now seen corresponding path program 19 times [2020-10-27 01:40:58,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:58,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1941873942] [2020-10-27 01:40:58,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:58,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:58,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:58,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:58,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:58,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:58,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:58,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:58,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:40:58,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:40:58,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 189 [2020-10-27 01:40:58,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:58,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:40:58,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:58,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:40:58,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:58,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:58,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:58,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:58,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:58,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:58,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:58,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:40:58,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:58,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:58,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:58,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:58,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:58,578 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:58,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1941873942] [2020-10-27 01:40:58,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:58,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:40:58,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480704721] [2020-10-27 01:40:58,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:40:58,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:58,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:40:58,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:40:58,580 INFO L87 Difference]: Start difference. First operand 1135 states and 1924 transitions. Second operand 11 states. [2020-10-27 01:40:59,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:59,628 INFO L93 Difference]: Finished difference Result 1193 states and 2004 transitions. [2020-10-27 01:40:59,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:40:59,629 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-27 01:40:59,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:59,631 INFO L225 Difference]: With dead ends: 1193 [2020-10-27 01:40:59,631 INFO L226 Difference]: Without dead ends: 1189 [2020-10-27 01:40:59,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:40:59,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2020-10-27 01:40:59,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 1154. [2020-10-27 01:40:59,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1154 states. [2020-10-27 01:40:59,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 1957 transitions. [2020-10-27 01:40:59,790 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 1957 transitions. Word has length 31 [2020-10-27 01:40:59,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:59,790 INFO L481 AbstractCegarLoop]: Abstraction has 1154 states and 1957 transitions. [2020-10-27 01:40:59,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:40:59,790 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 1957 transitions. [2020-10-27 01:40:59,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:40:59,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:59,792 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:59,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2020-10-27 01:40:59,792 INFO L429 AbstractCegarLoop]: === Iteration 86 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:59,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:59,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1918851078, now seen corresponding path program 28 times [2020-10-27 01:40:59,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:59,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [364409809] [2020-10-27 01:40:59,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:59,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:59,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:59,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:59,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:59,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:59,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:59,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:59,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:40:59,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:40:59,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 178 [2020-10-27 01:40:59,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:59,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:40:59,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:59,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:40:59,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:00,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:00,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:00,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:00,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:00,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:00,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:00,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:41:00,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:00,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:00,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:00,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:00,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:00,102 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:00,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [364409809] [2020-10-27 01:41:00,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:00,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:41:00,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767723512] [2020-10-27 01:41:00,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:41:00,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:00,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:41:00,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:41:00,103 INFO L87 Difference]: Start difference. First operand 1154 states and 1957 transitions. Second operand 11 states. [2020-10-27 01:41:01,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:01,074 INFO L93 Difference]: Finished difference Result 1208 states and 2030 transitions. [2020-10-27 01:41:01,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:41:01,075 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-27 01:41:01,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:01,077 INFO L225 Difference]: With dead ends: 1208 [2020-10-27 01:41:01,077 INFO L226 Difference]: Without dead ends: 1204 [2020-10-27 01:41:01,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:41:01,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2020-10-27 01:41:01,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 1169. [2020-10-27 01:41:01,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1169 states. [2020-10-27 01:41:01,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1169 states to 1169 states and 1983 transitions. [2020-10-27 01:41:01,177 INFO L78 Accepts]: Start accepts. Automaton has 1169 states and 1983 transitions. Word has length 31 [2020-10-27 01:41:01,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:01,178 INFO L481 AbstractCegarLoop]: Abstraction has 1169 states and 1983 transitions. [2020-10-27 01:41:01,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:41:01,178 INFO L276 IsEmpty]: Start isEmpty. Operand 1169 states and 1983 transitions. [2020-10-27 01:41:01,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:41:01,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:01,180 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:01,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2020-10-27 01:41:01,180 INFO L429 AbstractCegarLoop]: === Iteration 87 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:01,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:01,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1359016394, now seen corresponding path program 20 times [2020-10-27 01:41:01,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:01,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [512056623] [2020-10-27 01:41:01,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:01,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:01,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:01,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:01,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:01,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:01,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:01,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:01,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:41:01,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:41:01,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 193 [2020-10-27 01:41:01,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:01,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:41:01,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:01,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:41:01,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:01,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:01,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:01,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:01,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:01,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:01,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:01,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:41:01,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:01,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:01,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:01,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:01,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:01,515 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:01,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [512056623] [2020-10-27 01:41:01,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:01,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:41:01,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603655541] [2020-10-27 01:41:01,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:41:01,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:01,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:41:01,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:41:01,517 INFO L87 Difference]: Start difference. First operand 1169 states and 1983 transitions. Second operand 11 states. [2020-10-27 01:41:02,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:02,518 INFO L93 Difference]: Finished difference Result 1228 states and 2064 transitions. [2020-10-27 01:41:02,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:41:02,519 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-27 01:41:02,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:02,521 INFO L225 Difference]: With dead ends: 1228 [2020-10-27 01:41:02,521 INFO L226 Difference]: Without dead ends: 1224 [2020-10-27 01:41:02,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:41:02,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1224 states. [2020-10-27 01:41:02,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1224 to 1187. [2020-10-27 01:41:02,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1187 states. [2020-10-27 01:41:02,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1187 states to 1187 states and 2014 transitions. [2020-10-27 01:41:02,667 INFO L78 Accepts]: Start accepts. Automaton has 1187 states and 2014 transitions. Word has length 31 [2020-10-27 01:41:02,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:02,667 INFO L481 AbstractCegarLoop]: Abstraction has 1187 states and 2014 transitions. [2020-10-27 01:41:02,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:41:02,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1187 states and 2014 transitions. [2020-10-27 01:41:02,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:41:02,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:02,668 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:02,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2020-10-27 01:41:02,668 INFO L429 AbstractCegarLoop]: === Iteration 88 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:02,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:02,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1945822408, now seen corresponding path program 29 times [2020-10-27 01:41:02,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:02,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1065087729] [2020-10-27 01:41:02,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:02,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:02,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:02,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:02,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:02,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:02,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:02,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:02,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:41:02,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:41:02,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 202 [2020-10-27 01:41:02,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:02,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:41:02,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:02,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:41:02,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:02,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:02,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:02,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:02,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:03,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:03,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:03,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:41:03,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:03,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:03,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:03,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:03,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:03,003 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:03,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1065087729] [2020-10-27 01:41:03,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:03,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:41:03,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587178430] [2020-10-27 01:41:03,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:41:03,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:03,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:41:03,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:41:03,004 INFO L87 Difference]: Start difference. First operand 1187 states and 2014 transitions. Second operand 11 states. [2020-10-27 01:41:04,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:04,005 INFO L93 Difference]: Finished difference Result 1245 states and 2094 transitions. [2020-10-27 01:41:04,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:41:04,006 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-27 01:41:04,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:04,008 INFO L225 Difference]: With dead ends: 1245 [2020-10-27 01:41:04,008 INFO L226 Difference]: Without dead ends: 1241 [2020-10-27 01:41:04,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:41:04,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2020-10-27 01:41:04,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 1205. [2020-10-27 01:41:04,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1205 states. [2020-10-27 01:41:04,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 2045 transitions. [2020-10-27 01:41:04,116 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 2045 transitions. Word has length 31 [2020-10-27 01:41:04,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:04,116 INFO L481 AbstractCegarLoop]: Abstraction has 1205 states and 2045 transitions. [2020-10-27 01:41:04,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:41:04,116 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 2045 transitions. [2020-10-27 01:41:04,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:41:04,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:04,118 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:04,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2020-10-27 01:41:04,118 INFO L429 AbstractCegarLoop]: === Iteration 89 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:04,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:04,118 INFO L82 PathProgramCache]: Analyzing trace with hash 723530186, now seen corresponding path program 30 times [2020-10-27 01:41:04,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:04,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1582607067] [2020-10-27 01:41:04,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:04,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:04,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:04,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:04,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:04,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:04,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:04,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:04,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:41:04,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:41:04,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 175 [2020-10-27 01:41:04,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:04,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:41:04,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:04,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:41:04,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:04,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:04,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:04,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:04,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:04,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:04,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:04,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:41:04,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:04,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:04,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:04,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:04,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:04,428 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:04,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1582607067] [2020-10-27 01:41:04,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:04,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:41:04,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619328337] [2020-10-27 01:41:04,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:41:04,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:04,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:41:04,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:41:04,429 INFO L87 Difference]: Start difference. First operand 1205 states and 2045 transitions. Second operand 11 states. [2020-10-27 01:41:05,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:05,445 INFO L93 Difference]: Finished difference Result 1264 states and 2127 transitions. [2020-10-27 01:41:05,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:41:05,446 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-27 01:41:05,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:05,448 INFO L225 Difference]: With dead ends: 1264 [2020-10-27 01:41:05,448 INFO L226 Difference]: Without dead ends: 1260 [2020-10-27 01:41:05,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:41:05,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2020-10-27 01:41:05,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 1225. [2020-10-27 01:41:05,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1225 states. [2020-10-27 01:41:05,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1225 states to 1225 states and 2080 transitions. [2020-10-27 01:41:05,551 INFO L78 Accepts]: Start accepts. Automaton has 1225 states and 2080 transitions. Word has length 31 [2020-10-27 01:41:05,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:05,551 INFO L481 AbstractCegarLoop]: Abstraction has 1225 states and 2080 transitions. [2020-10-27 01:41:05,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:41:05,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1225 states and 2080 transitions. [2020-10-27 01:41:05,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:41:05,553 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:05,553 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:05,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2020-10-27 01:41:05,553 INFO L429 AbstractCegarLoop]: === Iteration 90 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:05,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:05,553 INFO L82 PathProgramCache]: Analyzing trace with hash 330503176, now seen corresponding path program 31 times [2020-10-27 01:41:05,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:05,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [210740351] [2020-10-27 01:41:05,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:05,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:05,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:05,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:05,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:05,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:05,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:05,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:05,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:41:05,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:41:05,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 187 [2020-10-27 01:41:05,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:05,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:41:05,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:05,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:41:05,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:05,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:05,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:05,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:05,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:05,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:05,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:05,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:41:05,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:05,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:05,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:05,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:05,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:05,876 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:05,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [210740351] [2020-10-27 01:41:05,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:05,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:41:05,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310226354] [2020-10-27 01:41:05,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:41:05,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:05,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:41:05,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:41:05,877 INFO L87 Difference]: Start difference. First operand 1225 states and 2080 transitions. Second operand 11 states. [2020-10-27 01:41:06,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:06,888 INFO L93 Difference]: Finished difference Result 1279 states and 2153 transitions. [2020-10-27 01:41:06,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:41:06,889 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-27 01:41:06,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:06,892 INFO L225 Difference]: With dead ends: 1279 [2020-10-27 01:41:06,892 INFO L226 Difference]: Without dead ends: 1275 [2020-10-27 01:41:06,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:41:06,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2020-10-27 01:41:07,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1240. [2020-10-27 01:41:07,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1240 states. [2020-10-27 01:41:07,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 2106 transitions. [2020-10-27 01:41:07,007 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 2106 transitions. Word has length 31 [2020-10-27 01:41:07,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:07,007 INFO L481 AbstractCegarLoop]: Abstraction has 1240 states and 2106 transitions. [2020-10-27 01:41:07,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:41:07,007 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 2106 transitions. [2020-10-27 01:41:07,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:41:07,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:07,008 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:07,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2020-10-27 01:41:07,009 INFO L429 AbstractCegarLoop]: === Iteration 91 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:07,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:07,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1347603000, now seen corresponding path program 32 times [2020-10-27 01:41:07,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:07,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400777283] [2020-10-27 01:41:07,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:07,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:07,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:07,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:07,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:07,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:07,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:07,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:07,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:41:07,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:41:07,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-10-27 01:41:07,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:07,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:41:07,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:07,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:41:07,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:07,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:07,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:07,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:07,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:07,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:07,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:07,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:41:07,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:07,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:07,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:07,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:07,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:07,334 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:07,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400777283] [2020-10-27 01:41:07,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:07,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:41:07,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215711757] [2020-10-27 01:41:07,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:41:07,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:07,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:41:07,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:41:07,335 INFO L87 Difference]: Start difference. First operand 1240 states and 2106 transitions. Second operand 11 states. [2020-10-27 01:41:08,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:08,362 INFO L93 Difference]: Finished difference Result 1294 states and 2179 transitions. [2020-10-27 01:41:08,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:41:08,362 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-27 01:41:08,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:08,365 INFO L225 Difference]: With dead ends: 1294 [2020-10-27 01:41:08,365 INFO L226 Difference]: Without dead ends: 1290 [2020-10-27 01:41:08,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:41:08,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1290 states. [2020-10-27 01:41:08,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1290 to 1255. [2020-10-27 01:41:08,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1255 states. [2020-10-27 01:41:08,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 2132 transitions. [2020-10-27 01:41:08,470 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 2132 transitions. Word has length 31 [2020-10-27 01:41:08,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:08,470 INFO L481 AbstractCegarLoop]: Abstraction has 1255 states and 2132 transitions. [2020-10-27 01:41:08,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:41:08,471 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 2132 transitions. [2020-10-27 01:41:08,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:41:08,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:08,472 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:08,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2020-10-27 01:41:08,473 INFO L429 AbstractCegarLoop]: === Iteration 92 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:08,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:08,473 INFO L82 PathProgramCache]: Analyzing trace with hash 760796986, now seen corresponding path program 33 times [2020-10-27 01:41:08,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:08,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [274179551] [2020-10-27 01:41:08,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:08,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:08,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:08,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:08,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:08,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:08,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:08,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:08,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:41:08,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:41:08,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 194 [2020-10-27 01:41:08,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:08,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:41:08,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:08,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:41:08,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:08,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:08,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:08,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:08,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:08,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:08,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:08,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:41:08,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:08,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:08,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:08,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:08,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:08,800 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:08,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [274179551] [2020-10-27 01:41:08,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:08,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:41:08,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094478367] [2020-10-27 01:41:08,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:41:08,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:08,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:41:08,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:41:08,802 INFO L87 Difference]: Start difference. First operand 1255 states and 2132 transitions. Second operand 11 states. [2020-10-27 01:41:09,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:09,832 INFO L93 Difference]: Finished difference Result 1313 states and 2212 transitions. [2020-10-27 01:41:09,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:41:09,833 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-27 01:41:09,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:09,835 INFO L225 Difference]: With dead ends: 1313 [2020-10-27 01:41:09,835 INFO L226 Difference]: Without dead ends: 1309 [2020-10-27 01:41:09,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:41:09,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1309 states. [2020-10-27 01:41:09,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1309 to 1273. [2020-10-27 01:41:09,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1273 states. [2020-10-27 01:41:09,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1273 states to 1273 states and 2163 transitions. [2020-10-27 01:41:09,973 INFO L78 Accepts]: Start accepts. Automaton has 1273 states and 2163 transitions. Word has length 31 [2020-10-27 01:41:09,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:09,974 INFO L481 AbstractCegarLoop]: Abstraction has 1273 states and 2163 transitions. [2020-10-27 01:41:09,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:41:09,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1273 states and 2163 transitions. [2020-10-27 01:41:09,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:41:09,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:09,975 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:09,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2020-10-27 01:41:09,976 INFO L429 AbstractCegarLoop]: === Iteration 93 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:09,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:09,976 INFO L82 PathProgramCache]: Analyzing trace with hash 46772060, now seen corresponding path program 34 times [2020-10-27 01:41:09,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:09,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1719928670] [2020-10-27 01:41:09,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:09,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:09,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:10,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:10,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:10,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:10,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:10,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:10,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:41:10,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:41:10,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 211 [2020-10-27 01:41:10,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:10,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:41:10,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:10,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:41:10,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:10,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:10,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:10,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:10,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:10,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:10,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:10,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:41:10,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:10,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:10,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:10,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:10,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:10,321 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:10,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1719928670] [2020-10-27 01:41:10,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:10,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:41:10,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383063908] [2020-10-27 01:41:10,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:41:10,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:10,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:41:10,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:41:10,323 INFO L87 Difference]: Start difference. First operand 1273 states and 2163 transitions. Second operand 11 states. [2020-10-27 01:41:11,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:11,355 INFO L93 Difference]: Finished difference Result 1328 states and 2238 transitions. [2020-10-27 01:41:11,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:41:11,355 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-27 01:41:11,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:11,358 INFO L225 Difference]: With dead ends: 1328 [2020-10-27 01:41:11,358 INFO L226 Difference]: Without dead ends: 1324 [2020-10-27 01:41:11,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:41:11,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2020-10-27 01:41:11,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 1289. [2020-10-27 01:41:11,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1289 states. [2020-10-27 01:41:11,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1289 states to 1289 states and 2191 transitions. [2020-10-27 01:41:11,463 INFO L78 Accepts]: Start accepts. Automaton has 1289 states and 2191 transitions. Word has length 31 [2020-10-27 01:41:11,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:11,464 INFO L481 AbstractCegarLoop]: Abstraction has 1289 states and 2191 transitions. [2020-10-27 01:41:11,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:41:11,464 INFO L276 IsEmpty]: Start isEmpty. Operand 1289 states and 2191 transitions. [2020-10-27 01:41:11,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:41:11,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:11,465 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:11,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2020-10-27 01:41:11,465 INFO L429 AbstractCegarLoop]: === Iteration 94 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:11,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:11,465 INFO L82 PathProgramCache]: Analyzing trace with hash -346254950, now seen corresponding path program 35 times [2020-10-27 01:41:11,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:11,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [343454745] [2020-10-27 01:41:11,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:11,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:11,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:11,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:11,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:11,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:11,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:11,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:11,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:41:11,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:41:11,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 180 [2020-10-27 01:41:11,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:11,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:41:11,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:11,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:41:11,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:11,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:11,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:11,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:11,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:11,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:11,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:11,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:41:11,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:11,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:11,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:11,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:11,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:11,781 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:11,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [343454745] [2020-10-27 01:41:11,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:11,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:41:11,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679505094] [2020-10-27 01:41:11,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:41:11,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:11,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:41:11,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:41:11,783 INFO L87 Difference]: Start difference. First operand 1289 states and 2191 transitions. Second operand 11 states. [2020-10-27 01:41:12,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:12,790 INFO L93 Difference]: Finished difference Result 1346 states and 2269 transitions. [2020-10-27 01:41:12,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:41:12,791 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-27 01:41:12,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:12,793 INFO L225 Difference]: With dead ends: 1346 [2020-10-27 01:41:12,793 INFO L226 Difference]: Without dead ends: 1342 [2020-10-27 01:41:12,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:41:12,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2020-10-27 01:41:12,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 1307. [2020-10-27 01:41:12,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1307 states. [2020-10-27 01:41:12,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1307 states to 1307 states and 2222 transitions. [2020-10-27 01:41:12,902 INFO L78 Accepts]: Start accepts. Automaton has 1307 states and 2222 transitions. Word has length 31 [2020-10-27 01:41:12,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:12,902 INFO L481 AbstractCegarLoop]: Abstraction has 1307 states and 2222 transitions. [2020-10-27 01:41:12,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:41:12,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1307 states and 2222 transitions. [2020-10-27 01:41:12,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:41:12,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:12,904 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:12,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2020-10-27 01:41:12,904 INFO L429 AbstractCegarLoop]: === Iteration 95 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:12,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:12,904 INFO L82 PathProgramCache]: Analyzing trace with hash -964345190, now seen corresponding path program 36 times [2020-10-27 01:41:12,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:12,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2111905959] [2020-10-27 01:41:12,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:12,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:12,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:12,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:12,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:12,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:12,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:13,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:13,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:41:13,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:41:13,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 194 [2020-10-27 01:41:13,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:13,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:41:13,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:13,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:41:13,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:13,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:13,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:13,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:13,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:13,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:13,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:13,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:41:13,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:13,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:13,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:13,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:13,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:13,228 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:13,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2111905959] [2020-10-27 01:41:13,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:13,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:41:13,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869754569] [2020-10-27 01:41:13,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:41:13,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:13,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:41:13,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:41:13,230 INFO L87 Difference]: Start difference. First operand 1307 states and 2222 transitions. Second operand 11 states. [2020-10-27 01:41:14,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:14,227 INFO L93 Difference]: Finished difference Result 1361 states and 2295 transitions. [2020-10-27 01:41:14,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:41:14,228 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-27 01:41:14,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:14,230 INFO L225 Difference]: With dead ends: 1361 [2020-10-27 01:41:14,230 INFO L226 Difference]: Without dead ends: 1357 [2020-10-27 01:41:14,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:41:14,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1357 states. [2020-10-27 01:41:14,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1357 to 1322. [2020-10-27 01:41:14,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1322 states. [2020-10-27 01:41:14,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1322 states to 1322 states and 2248 transitions. [2020-10-27 01:41:14,338 INFO L78 Accepts]: Start accepts. Automaton has 1322 states and 2248 transitions. Word has length 31 [2020-10-27 01:41:14,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:14,338 INFO L481 AbstractCegarLoop]: Abstraction has 1322 states and 2248 transitions. [2020-10-27 01:41:14,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:41:14,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states and 2248 transitions. [2020-10-27 01:41:14,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:41:14,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:14,339 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:14,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2020-10-27 01:41:14,339 INFO L429 AbstractCegarLoop]: === Iteration 96 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:14,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:14,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1357372200, now seen corresponding path program 18 times [2020-10-27 01:41:14,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:14,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [226410255] [2020-10-27 01:41:14,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:14,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:14,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:14,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:14,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:14,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:14,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:14,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:14,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:41:14,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:41:14,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 202 [2020-10-27 01:41:14,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:14,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:41:14,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:14,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:41:14,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:14,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:14,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:14,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:14,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:14,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:14,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:14,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:41:14,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:14,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:14,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:14,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:14,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:14,671 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:14,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [226410255] [2020-10-27 01:41:14,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:14,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:41:14,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823207809] [2020-10-27 01:41:14,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:41:14,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:14,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:41:14,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:41:14,673 INFO L87 Difference]: Start difference. First operand 1322 states and 2248 transitions. Second operand 11 states. [2020-10-27 01:41:15,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:15,657 INFO L93 Difference]: Finished difference Result 1376 states and 2321 transitions. [2020-10-27 01:41:15,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:41:15,658 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-27 01:41:15,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:15,660 INFO L225 Difference]: With dead ends: 1376 [2020-10-27 01:41:15,660 INFO L226 Difference]: Without dead ends: 1372 [2020-10-27 01:41:15,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:41:15,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1372 states. [2020-10-27 01:41:15,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1372 to 1337. [2020-10-27 01:41:15,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1337 states. [2020-10-27 01:41:15,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1337 states to 1337 states and 2274 transitions. [2020-10-27 01:41:15,783 INFO L78 Accepts]: Start accepts. Automaton has 1337 states and 2274 transitions. Word has length 31 [2020-10-27 01:41:15,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:15,783 INFO L481 AbstractCegarLoop]: Abstraction has 1337 states and 2274 transitions. [2020-10-27 01:41:15,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:41:15,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1337 states and 2274 transitions. [2020-10-27 01:41:15,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:41:15,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:15,785 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:15,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2020-10-27 01:41:15,785 INFO L429 AbstractCegarLoop]: === Iteration 97 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:15,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:15,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1560387382, now seen corresponding path program 37 times [2020-10-27 01:41:15,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:15,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [330527873] [2020-10-27 01:41:15,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:15,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:15,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:15,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:15,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:15,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:15,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:15,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:15,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:41:15,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:41:15,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 184 [2020-10-27 01:41:15,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:15,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:41:15,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:15,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:41:15,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:16,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:16,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:16,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:16,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:16,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:16,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:16,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:41:16,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:16,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:16,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:16,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:16,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:16,098 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:16,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [330527873] [2020-10-27 01:41:16,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:16,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:41:16,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409894101] [2020-10-27 01:41:16,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:41:16,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:16,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:41:16,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:41:16,099 INFO L87 Difference]: Start difference. First operand 1337 states and 2274 transitions. Second operand 11 states. [2020-10-27 01:41:17,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:17,083 INFO L93 Difference]: Finished difference Result 1392 states and 2349 transitions. [2020-10-27 01:41:17,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:41:17,084 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-27 01:41:17,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:17,086 INFO L225 Difference]: With dead ends: 1392 [2020-10-27 01:41:17,086 INFO L226 Difference]: Without dead ends: 1388 [2020-10-27 01:41:17,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:41:17,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1388 states. [2020-10-27 01:41:17,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1388 to 1353. [2020-10-27 01:41:17,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1353 states. [2020-10-27 01:41:17,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1353 states to 1353 states and 2302 transitions. [2020-10-27 01:41:17,216 INFO L78 Accepts]: Start accepts. Automaton has 1353 states and 2302 transitions. Word has length 31 [2020-10-27 01:41:17,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:17,216 INFO L481 AbstractCegarLoop]: Abstraction has 1353 states and 2302 transitions. [2020-10-27 01:41:17,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:41:17,216 INFO L276 IsEmpty]: Start isEmpty. Operand 1353 states and 2302 transitions. [2020-10-27 01:41:17,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:41:17,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:17,218 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:17,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2020-10-27 01:41:17,218 INFO L429 AbstractCegarLoop]: === Iteration 98 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:17,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:17,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1953414392, now seen corresponding path program 38 times [2020-10-27 01:41:17,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:17,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [50016826] [2020-10-27 01:41:17,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:17,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:17,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:17,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:17,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:17,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:17,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:17,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:17,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:41:17,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:41:17,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 175 [2020-10-27 01:41:17,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:17,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:41:17,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:17,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:41:17,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:17,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:17,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:17,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:17,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:17,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:17,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:17,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:41:17,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:17,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:17,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:17,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:17,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:17,522 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:17,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [50016826] [2020-10-27 01:41:17,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:17,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:41:17,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630556695] [2020-10-27 01:41:17,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:41:17,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:17,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:41:17,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:41:17,523 INFO L87 Difference]: Start difference. First operand 1353 states and 2302 transitions. Second operand 11 states. [2020-10-27 01:41:18,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:18,516 INFO L93 Difference]: Finished difference Result 1411 states and 2382 transitions. [2020-10-27 01:41:18,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:41:18,517 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-27 01:41:18,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:18,519 INFO L225 Difference]: With dead ends: 1411 [2020-10-27 01:41:18,519 INFO L226 Difference]: Without dead ends: 1407 [2020-10-27 01:41:18,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:41:18,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1407 states. [2020-10-27 01:41:18,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1407 to 1372. [2020-10-27 01:41:18,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1372 states. [2020-10-27 01:41:18,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 2335 transitions. [2020-10-27 01:41:18,633 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 2335 transitions. Word has length 31 [2020-10-27 01:41:18,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:18,633 INFO L481 AbstractCegarLoop]: Abstraction has 1372 states and 2335 transitions. [2020-10-27 01:41:18,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:41:18,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 2335 transitions. [2020-10-27 01:41:18,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:41:18,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:18,634 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:18,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2020-10-27 01:41:18,634 INFO L429 AbstractCegarLoop]: === Iteration 99 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:18,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:18,635 INFO L82 PathProgramCache]: Analyzing trace with hash -936314568, now seen corresponding path program 39 times [2020-10-27 01:41:18,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:18,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2024376502] [2020-10-27 01:41:18,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:18,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:18,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:18,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:18,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:18,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:18,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:18,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:18,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:41:18,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:41:18,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 207 [2020-10-27 01:41:18,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:18,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:41:18,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:18,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:41:18,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:18,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:18,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:18,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:18,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:18,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:18,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:18,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:41:18,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:18,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:18,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:18,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:18,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:18,978 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:18,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2024376502] [2020-10-27 01:41:18,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:18,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:41:18,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246938687] [2020-10-27 01:41:18,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:41:18,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:18,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:41:18,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:41:18,979 INFO L87 Difference]: Start difference. First operand 1372 states and 2335 transitions. Second operand 11 states. [2020-10-27 01:41:19,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:19,956 INFO L93 Difference]: Finished difference Result 1430 states and 2415 transitions. [2020-10-27 01:41:19,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:41:19,957 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-27 01:41:19,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:19,960 INFO L225 Difference]: With dead ends: 1430 [2020-10-27 01:41:19,960 INFO L226 Difference]: Without dead ends: 1426 [2020-10-27 01:41:19,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:41:19,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1426 states. [2020-10-27 01:41:20,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1426 to 1390. [2020-10-27 01:41:20,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1390 states. [2020-10-27 01:41:20,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 2366 transitions. [2020-10-27 01:41:20,082 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 2366 transitions. Word has length 31 [2020-10-27 01:41:20,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:20,082 INFO L481 AbstractCegarLoop]: Abstraction has 1390 states and 2366 transitions. [2020-10-27 01:41:20,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:41:20,082 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 2366 transitions. [2020-10-27 01:41:20,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:41:20,084 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:20,084 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:20,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2020-10-27 01:41:20,084 INFO L429 AbstractCegarLoop]: === Iteration 100 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:20,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:20,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1523120582, now seen corresponding path program 40 times [2020-10-27 01:41:20,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:20,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [668016429] [2020-10-27 01:41:20,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:20,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:20,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:20,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:20,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:20,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:20,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:20,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:20,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:41:20,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:41:20,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 192 [2020-10-27 01:41:20,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:20,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:41:20,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:20,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:41:20,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:20,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:20,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:20,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:20,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:20,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:20,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:20,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:41:20,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:20,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:20,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:20,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:20,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:20,406 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:20,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [668016429] [2020-10-27 01:41:20,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:20,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:41:20,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336390944] [2020-10-27 01:41:20,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:41:20,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:20,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:41:20,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:41:20,407 INFO L87 Difference]: Start difference. First operand 1390 states and 2366 transitions. Second operand 11 states. [2020-10-27 01:41:21,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:21,402 INFO L93 Difference]: Finished difference Result 1444 states and 2439 transitions. [2020-10-27 01:41:21,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:41:21,403 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-27 01:41:21,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:21,405 INFO L225 Difference]: With dead ends: 1444 [2020-10-27 01:41:21,405 INFO L226 Difference]: Without dead ends: 1440 [2020-10-27 01:41:21,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:41:21,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1440 states. [2020-10-27 01:41:21,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1440 to 1405. [2020-10-27 01:41:21,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1405 states. [2020-10-27 01:41:21,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1405 states to 1405 states and 2392 transitions. [2020-10-27 01:41:21,534 INFO L78 Accepts]: Start accepts. Automaton has 1405 states and 2392 transitions. Word has length 31 [2020-10-27 01:41:21,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:21,534 INFO L481 AbstractCegarLoop]: Abstraction has 1405 states and 2392 transitions. [2020-10-27 01:41:21,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:41:21,534 INFO L276 IsEmpty]: Start isEmpty. Operand 1405 states and 2392 transitions. [2020-10-27 01:41:21,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:41:21,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:21,536 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:21,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2020-10-27 01:41:21,536 INFO L429 AbstractCegarLoop]: === Iteration 101 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:21,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:21,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1146232012, now seen corresponding path program 41 times [2020-10-27 01:41:21,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:21,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [597975633] [2020-10-27 01:41:21,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:21,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:21,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:21,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:21,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:21,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:21,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:21,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:21,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:41:21,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:41:21,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 189 [2020-10-27 01:41:21,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:21,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:41:21,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:21,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:41:21,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:21,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:21,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:21,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:21,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:21,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:21,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:21,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:41:21,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:21,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:21,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:21,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:21,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:21,859 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:21,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [597975633] [2020-10-27 01:41:21,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:21,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:41:21,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531878420] [2020-10-27 01:41:21,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:41:21,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:21,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:41:21,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:41:21,861 INFO L87 Difference]: Start difference. First operand 1405 states and 2392 transitions. Second operand 11 states. [2020-10-27 01:41:22,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:22,857 INFO L93 Difference]: Finished difference Result 1459 states and 2465 transitions. [2020-10-27 01:41:22,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:41:22,858 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-27 01:41:22,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:22,861 INFO L225 Difference]: With dead ends: 1459 [2020-10-27 01:41:22,861 INFO L226 Difference]: Without dead ends: 1455 [2020-10-27 01:41:22,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:41:22,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1455 states. [2020-10-27 01:41:22,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1455 to 1420. [2020-10-27 01:41:22,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1420 states. [2020-10-27 01:41:22,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1420 states to 1420 states and 2418 transitions. [2020-10-27 01:41:22,991 INFO L78 Accepts]: Start accepts. Automaton has 1420 states and 2418 transitions. Word has length 31 [2020-10-27 01:41:22,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:22,991 INFO L481 AbstractCegarLoop]: Abstraction has 1420 states and 2418 transitions. [2020-10-27 01:41:22,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:41:22,991 INFO L276 IsEmpty]: Start isEmpty. Operand 1420 states and 2418 transitions. [2020-10-27 01:41:22,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:41:22,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:22,992 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:22,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2020-10-27 01:41:22,992 INFO L429 AbstractCegarLoop]: === Iteration 102 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:22,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:22,993 INFO L82 PathProgramCache]: Analyzing trace with hash 753205002, now seen corresponding path program 19 times [2020-10-27 01:41:22,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:22,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2076760894] [2020-10-27 01:41:22,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:22,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:23,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:23,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:23,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:23,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:23,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:23,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:23,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:41:23,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:41:23,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 186 [2020-10-27 01:41:23,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:23,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:41:23,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:23,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:41:23,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:23,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:23,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:23,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:23,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:23,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:23,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:23,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:41:23,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:23,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:23,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:23,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:23,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:23,330 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:23,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2076760894] [2020-10-27 01:41:23,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:23,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:41:23,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696139487] [2020-10-27 01:41:23,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:41:23,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:23,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:41:23,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:41:23,332 INFO L87 Difference]: Start difference. First operand 1420 states and 2418 transitions. Second operand 11 states. [2020-10-27 01:41:24,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:24,330 INFO L93 Difference]: Finished difference Result 1478 states and 2498 transitions. [2020-10-27 01:41:24,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:41:24,331 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-27 01:41:24,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:24,333 INFO L225 Difference]: With dead ends: 1478 [2020-10-27 01:41:24,333 INFO L226 Difference]: Without dead ends: 1474 [2020-10-27 01:41:24,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:41:24,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1474 states. [2020-10-27 01:41:24,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1474 to 1439. [2020-10-27 01:41:24,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1439 states. [2020-10-27 01:41:24,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 2451 transitions. [2020-10-27 01:41:24,451 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 2451 transitions. Word has length 31 [2020-10-27 01:41:24,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:24,451 INFO L481 AbstractCegarLoop]: Abstraction has 1439 states and 2451 transitions. [2020-10-27 01:41:24,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:41:24,451 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 2451 transitions. [2020-10-27 01:41:24,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:41:24,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:24,452 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:24,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2020-10-27 01:41:24,452 INFO L429 AbstractCegarLoop]: === Iteration 103 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:24,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:24,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1770304826, now seen corresponding path program 42 times [2020-10-27 01:41:24,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:24,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186955819] [2020-10-27 01:41:24,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:24,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:24,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:24,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:24,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:24,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:24,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:24,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:24,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:41:24,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:41:24,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 222 [2020-10-27 01:41:24,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:24,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:41:24,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:24,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:41:24,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:24,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:24,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:24,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:24,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:24,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:24,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:24,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:41:24,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:24,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:24,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:24,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:24,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:24,802 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:24,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186955819] [2020-10-27 01:41:24,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:24,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:41:24,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516482707] [2020-10-27 01:41:24,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:41:24,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:24,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:41:24,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:41:24,804 INFO L87 Difference]: Start difference. First operand 1439 states and 2451 transitions. Second operand 11 states. [2020-10-27 01:41:25,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:25,799 INFO L93 Difference]: Finished difference Result 1497 states and 2531 transitions. [2020-10-27 01:41:25,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:41:25,799 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-27 01:41:25,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:25,802 INFO L225 Difference]: With dead ends: 1497 [2020-10-27 01:41:25,802 INFO L226 Difference]: Without dead ends: 1493 [2020-10-27 01:41:25,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:41:25,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1493 states. [2020-10-27 01:41:25,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1493 to 1457. [2020-10-27 01:41:25,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1457 states. [2020-10-27 01:41:25,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1457 states to 1457 states and 2482 transitions. [2020-10-27 01:41:25,932 INFO L78 Accepts]: Start accepts. Automaton has 1457 states and 2482 transitions. Word has length 31 [2020-10-27 01:41:25,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:25,932 INFO L481 AbstractCegarLoop]: Abstraction has 1457 states and 2482 transitions. [2020-10-27 01:41:25,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:41:25,932 INFO L276 IsEmpty]: Start isEmpty. Operand 1457 states and 2482 transitions. [2020-10-27 01:41:25,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:41:25,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:25,933 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:25,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2020-10-27 01:41:25,933 INFO L429 AbstractCegarLoop]: === Iteration 104 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:25,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:25,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1183498812, now seen corresponding path program 20 times [2020-10-27 01:41:25,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:25,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2029798588] [2020-10-27 01:41:25,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:25,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:25,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:25,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:25,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:25,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:25,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:26,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:26,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:41:26,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:41:26,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 196 [2020-10-27 01:41:26,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:26,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:41:26,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:26,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:41:26,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:26,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:26,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:26,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:26,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:26,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:26,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:26,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:41:26,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:26,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:26,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:26,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:26,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:26,259 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:26,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2029798588] [2020-10-27 01:41:26,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:26,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:41:26,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49130482] [2020-10-27 01:41:26,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:41:26,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:26,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:41:26,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:41:26,261 INFO L87 Difference]: Start difference. First operand 1457 states and 2482 transitions. Second operand 11 states. [2020-10-27 01:41:27,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:27,274 INFO L93 Difference]: Finished difference Result 1516 states and 2563 transitions. [2020-10-27 01:41:27,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:41:27,275 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-27 01:41:27,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:27,277 INFO L225 Difference]: With dead ends: 1516 [2020-10-27 01:41:27,277 INFO L226 Difference]: Without dead ends: 1512 [2020-10-27 01:41:27,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:41:27,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1512 states. [2020-10-27 01:41:27,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1512 to 1475. [2020-10-27 01:41:27,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1475 states. [2020-10-27 01:41:27,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1475 states to 1475 states and 2513 transitions. [2020-10-27 01:41:27,396 INFO L78 Accepts]: Start accepts. Automaton has 1475 states and 2513 transitions. Word has length 31 [2020-10-27 01:41:27,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:27,396 INFO L481 AbstractCegarLoop]: Abstraction has 1475 states and 2513 transitions. [2020-10-27 01:41:27,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:41:27,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1475 states and 2513 transitions. [2020-10-27 01:41:27,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:41:27,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:27,397 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:27,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2020-10-27 01:41:27,397 INFO L429 AbstractCegarLoop]: === Iteration 105 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:27,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:27,397 INFO L82 PathProgramCache]: Analyzing trace with hash 771585193, now seen corresponding path program 21 times [2020-10-27 01:41:27,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:27,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395868853] [2020-10-27 01:41:27,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:27,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:27,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:27,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:27,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:27,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:27,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:27,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:27,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:27,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:41:27,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:41:27,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 276 [2020-10-27 01:41:27,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:27,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:41:27,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:27,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:41:27,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:27,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:27,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:27,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:27,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:27,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:27,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:27,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:41:27,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:27,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:27,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:27,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:27,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:27,822 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:27,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395868853] [2020-10-27 01:41:27,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:27,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:41:27,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760775434] [2020-10-27 01:41:27,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:41:27,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:27,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:41:27,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:41:27,823 INFO L87 Difference]: Start difference. First operand 1475 states and 2513 transitions. Second operand 12 states. [2020-10-27 01:41:29,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:29,017 INFO L93 Difference]: Finished difference Result 1545 states and 2609 transitions. [2020-10-27 01:41:29,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:41:29,017 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-27 01:41:29,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:29,020 INFO L225 Difference]: With dead ends: 1545 [2020-10-27 01:41:29,020 INFO L226 Difference]: Without dead ends: 1541 [2020-10-27 01:41:29,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:41:29,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1541 states. [2020-10-27 01:41:29,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1541 to 1494. [2020-10-27 01:41:29,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1494 states. [2020-10-27 01:41:29,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 2545 transitions. [2020-10-27 01:41:29,160 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 2545 transitions. Word has length 32 [2020-10-27 01:41:29,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:29,160 INFO L481 AbstractCegarLoop]: Abstraction has 1494 states and 2545 transitions. [2020-10-27 01:41:29,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:41:29,160 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 2545 transitions. [2020-10-27 01:41:29,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:41:29,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:29,161 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:29,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2020-10-27 01:41:29,162 INFO L429 AbstractCegarLoop]: === Iteration 106 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:29,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:29,162 INFO L82 PathProgramCache]: Analyzing trace with hash 378558183, now seen corresponding path program 21 times [2020-10-27 01:41:29,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:29,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2092135636] [2020-10-27 01:41:29,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:29,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:29,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:29,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:29,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:29,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:29,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:29,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:29,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:29,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:41:29,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:41:29,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 277 [2020-10-27 01:41:29,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:29,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:41:29,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:29,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:41:29,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:29,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:29,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:29,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:29,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:29,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:29,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:29,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:41:29,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:29,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:29,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:29,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:29,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:29,592 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:29,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2092135636] [2020-10-27 01:41:29,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:29,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:41:29,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994721483] [2020-10-27 01:41:29,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:41:29,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:29,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:41:29,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:41:29,593 INFO L87 Difference]: Start difference. First operand 1494 states and 2545 transitions. Second operand 12 states. [2020-10-27 01:41:30,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:30,794 INFO L93 Difference]: Finished difference Result 1562 states and 2638 transitions. [2020-10-27 01:41:30,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:41:30,795 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-27 01:41:30,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:30,798 INFO L225 Difference]: With dead ends: 1562 [2020-10-27 01:41:30,798 INFO L226 Difference]: Without dead ends: 1558 [2020-10-27 01:41:30,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:41:30,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1558 states. [2020-10-27 01:41:30,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1558 to 1511. [2020-10-27 01:41:30,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1511 states. [2020-10-27 01:41:30,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1511 states to 1511 states and 2574 transitions. [2020-10-27 01:41:30,973 INFO L78 Accepts]: Start accepts. Automaton has 1511 states and 2574 transitions. Word has length 32 [2020-10-27 01:41:30,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:30,973 INFO L481 AbstractCegarLoop]: Abstraction has 1511 states and 2574 transitions. [2020-10-27 01:41:30,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:41:30,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1511 states and 2574 transitions. [2020-10-27 01:41:30,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:41:30,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:30,974 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:30,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2020-10-27 01:41:30,975 INFO L429 AbstractCegarLoop]: === Iteration 107 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:30,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:30,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1395658007, now seen corresponding path program 22 times [2020-10-27 01:41:30,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:30,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839729883] [2020-10-27 01:41:30,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:30,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:30,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:31,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:31,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:31,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:31,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:31,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:31,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:31,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:41:31,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:41:31,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 286 [2020-10-27 01:41:31,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:31,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:41:31,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:31,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:41:31,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:31,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:31,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:31,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:31,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:31,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:31,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:31,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:41:31,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:31,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:31,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:31,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:31,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:31,414 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:31,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1839729883] [2020-10-27 01:41:31,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:31,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:41:31,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426135395] [2020-10-27 01:41:31,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:41:31,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:31,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:41:31,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:41:31,415 INFO L87 Difference]: Start difference. First operand 1511 states and 2574 transitions. Second operand 12 states. [2020-10-27 01:41:32,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:32,623 INFO L93 Difference]: Finished difference Result 1590 states and 2686 transitions. [2020-10-27 01:41:32,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:41:32,624 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-27 01:41:32,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:32,627 INFO L225 Difference]: With dead ends: 1590 [2020-10-27 01:41:32,627 INFO L226 Difference]: Without dead ends: 1586 [2020-10-27 01:41:32,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:41:32,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1586 states. [2020-10-27 01:41:32,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1586 to 1539. [2020-10-27 01:41:32,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1539 states. [2020-10-27 01:41:32,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1539 states to 1539 states and 2621 transitions. [2020-10-27 01:41:32,764 INFO L78 Accepts]: Start accepts. Automaton has 1539 states and 2621 transitions. Word has length 32 [2020-10-27 01:41:32,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:32,764 INFO L481 AbstractCegarLoop]: Abstraction has 1539 states and 2621 transitions. [2020-10-27 01:41:32,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:41:32,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1539 states and 2621 transitions. [2020-10-27 01:41:32,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:41:32,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:32,766 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:32,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2020-10-27 01:41:32,766 INFO L429 AbstractCegarLoop]: === Iteration 108 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:32,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:32,766 INFO L82 PathProgramCache]: Analyzing trace with hash 808851993, now seen corresponding path program 22 times [2020-10-27 01:41:32,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:32,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [894998760] [2020-10-27 01:41:32,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:32,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:32,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:32,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:32,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:32,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:32,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:32,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:33,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:33,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:41:33,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:41:33,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 299 [2020-10-27 01:41:33,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:33,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:41:33,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:33,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:41:33,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:33,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:33,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:33,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:33,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:33,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:33,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:33,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:41:33,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:33,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:33,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:33,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:33,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:33,217 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:33,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [894998760] [2020-10-27 01:41:33,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:33,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:41:33,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856989117] [2020-10-27 01:41:33,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:41:33,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:33,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:41:33,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:41:33,218 INFO L87 Difference]: Start difference. First operand 1539 states and 2621 transitions. Second operand 12 states. [2020-10-27 01:41:34,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:34,419 INFO L93 Difference]: Finished difference Result 1618 states and 2733 transitions. [2020-10-27 01:41:34,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:41:34,420 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-27 01:41:34,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:34,423 INFO L225 Difference]: With dead ends: 1618 [2020-10-27 01:41:34,423 INFO L226 Difference]: Without dead ends: 1614 [2020-10-27 01:41:34,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:41:34,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2020-10-27 01:41:34,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 1567. [2020-10-27 01:41:34,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1567 states. [2020-10-27 01:41:34,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1567 states to 1567 states and 2668 transitions. [2020-10-27 01:41:34,551 INFO L78 Accepts]: Start accepts. Automaton has 1567 states and 2668 transitions. Word has length 32 [2020-10-27 01:41:34,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:34,552 INFO L481 AbstractCegarLoop]: Abstraction has 1567 states and 2668 transitions. [2020-10-27 01:41:34,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:41:34,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1567 states and 2668 transitions. [2020-10-27 01:41:34,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:41:34,553 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:34,553 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:34,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2020-10-27 01:41:34,553 INFO L429 AbstractCegarLoop]: === Iteration 109 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:34,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:34,553 INFO L82 PathProgramCache]: Analyzing trace with hash -389236871, now seen corresponding path program 3 times [2020-10-27 01:41:34,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:34,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172063756] [2020-10-27 01:41:34,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:34,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:34,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:34,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:34,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:34,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:34,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:34,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:34,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:35,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:35,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:41:35,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:41:35,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 511 [2020-10-27 01:41:35,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:35,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:41:35,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:35,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:41:35,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:35,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:35,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:35,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:35,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:35,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:35,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:35,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:41:35,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:35,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:35,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:35,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:35,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:35,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-27 01:41:35,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:35,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:35,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:35,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:41:35,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:35,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:41:35,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:35,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:41:35,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:35,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:41:35,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:35,211 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:35,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1172063756] [2020-10-27 01:41:35,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:35,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:41:35,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516399295] [2020-10-27 01:41:35,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:41:35,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:35,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:41:35,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:41:35,213 INFO L87 Difference]: Start difference. First operand 1567 states and 2668 transitions. Second operand 11 states. [2020-10-27 01:41:36,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:36,203 INFO L93 Difference]: Finished difference Result 1611 states and 2721 transitions. [2020-10-27 01:41:36,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:41:36,203 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-27 01:41:36,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:36,206 INFO L225 Difference]: With dead ends: 1611 [2020-10-27 01:41:36,206 INFO L226 Difference]: Without dead ends: 1607 [2020-10-27 01:41:36,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:41:36,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1607 states. [2020-10-27 01:41:36,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1607 to 1567. [2020-10-27 01:41:36,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1567 states. [2020-10-27 01:41:36,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1567 states to 1567 states and 2668 transitions. [2020-10-27 01:41:36,341 INFO L78 Accepts]: Start accepts. Automaton has 1567 states and 2668 transitions. Word has length 33 [2020-10-27 01:41:36,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:36,341 INFO L481 AbstractCegarLoop]: Abstraction has 1567 states and 2668 transitions. [2020-10-27 01:41:36,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:41:36,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1567 states and 2668 transitions. [2020-10-27 01:41:36,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:41:36,342 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:36,343 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:36,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2020-10-27 01:41:36,343 INFO L429 AbstractCegarLoop]: === Iteration 110 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:36,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:36,343 INFO L82 PathProgramCache]: Analyzing trace with hash 235435497, now seen corresponding path program 23 times [2020-10-27 01:41:36,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:36,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100697914] [2020-10-27 01:41:36,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:36,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:36,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:36,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:36,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:36,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:36,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:36,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:36,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:36,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:41:36,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:41:36,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 387 [2020-10-27 01:41:36,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:36,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:41:36,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:36,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:41:36,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:36,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:36,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:36,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:36,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:36,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:36,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:36,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:41:36,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:36,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:36,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:36,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:36,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:36,881 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:36,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100697914] [2020-10-27 01:41:36,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:36,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:41:36,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006526874] [2020-10-27 01:41:36,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:41:36,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:36,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:41:36,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:41:36,882 INFO L87 Difference]: Start difference. First operand 1567 states and 2668 transitions. Second operand 12 states. [2020-10-27 01:41:38,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:38,113 INFO L93 Difference]: Finished difference Result 1639 states and 2769 transitions. [2020-10-27 01:41:38,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:41:38,114 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-27 01:41:38,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:38,117 INFO L225 Difference]: With dead ends: 1639 [2020-10-27 01:41:38,117 INFO L226 Difference]: Without dead ends: 1635 [2020-10-27 01:41:38,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:41:38,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2020-10-27 01:41:38,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1586. [2020-10-27 01:41:38,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1586 states. [2020-10-27 01:41:38,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1586 states to 1586 states and 2700 transitions. [2020-10-27 01:41:38,254 INFO L78 Accepts]: Start accepts. Automaton has 1586 states and 2700 transitions. Word has length 32 [2020-10-27 01:41:38,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:38,254 INFO L481 AbstractCegarLoop]: Abstraction has 1586 states and 2700 transitions. [2020-10-27 01:41:38,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:41:38,254 INFO L276 IsEmpty]: Start isEmpty. Operand 1586 states and 2700 transitions. [2020-10-27 01:41:38,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:41:38,255 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:38,255 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:38,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2020-10-27 01:41:38,255 INFO L429 AbstractCegarLoop]: === Iteration 111 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:38,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:38,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1977584773, now seen corresponding path program 3 times [2020-10-27 01:41:38,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:38,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1700150429] [2020-10-27 01:41:38,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:38,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:38,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:38,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:38,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:38,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:38,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:38,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:38,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:38,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:38,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:41:38,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:41:38,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 393 [2020-10-27 01:41:38,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:38,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:41:38,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:38,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:41:38,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:38,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:38,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:38,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:38,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:38,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:38,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:38,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:41:38,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:38,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:38,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:38,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:38,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:38,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-27 01:41:38,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:38,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:38,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:38,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:41:38,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:38,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:41:38,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:38,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:41:38,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:38,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:41:38,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:38,785 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:38,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1700150429] [2020-10-27 01:41:38,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:38,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:41:38,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934836457] [2020-10-27 01:41:38,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:41:38,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:38,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:41:38,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:41:38,787 INFO L87 Difference]: Start difference. First operand 1586 states and 2700 transitions. Second operand 11 states. [2020-10-27 01:41:39,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:39,786 INFO L93 Difference]: Finished difference Result 1630 states and 2753 transitions. [2020-10-27 01:41:39,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:41:39,787 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-27 01:41:39,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:39,789 INFO L225 Difference]: With dead ends: 1630 [2020-10-27 01:41:39,789 INFO L226 Difference]: Without dead ends: 1626 [2020-10-27 01:41:39,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:41:39,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1626 states. [2020-10-27 01:41:39,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1626 to 1586. [2020-10-27 01:41:39,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1586 states. [2020-10-27 01:41:39,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1586 states to 1586 states and 2700 transitions. [2020-10-27 01:41:39,936 INFO L78 Accepts]: Start accepts. Automaton has 1586 states and 2700 transitions. Word has length 33 [2020-10-27 01:41:39,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:39,936 INFO L481 AbstractCegarLoop]: Abstraction has 1586 states and 2700 transitions. [2020-10-27 01:41:39,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:41:39,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1586 states and 2700 transitions. [2020-10-27 01:41:39,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:41:39,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:39,937 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:39,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2020-10-27 01:41:39,937 INFO L429 AbstractCegarLoop]: === Iteration 112 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:39,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:39,938 INFO L82 PathProgramCache]: Analyzing trace with hash -785632857, now seen corresponding path program 23 times [2020-10-27 01:41:39,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:39,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [498525510] [2020-10-27 01:41:39,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:39,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:39,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:39,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:39,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:39,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:39,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:39,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:40,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:40,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:41:40,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:41:40,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 262 [2020-10-27 01:41:40,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:40,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:41:40,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:40,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:41:40,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:40,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:40,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:40,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:40,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:40,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:40,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:40,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:41:40,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:40,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:40,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:40,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:40,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:40,350 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:40,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [498525510] [2020-10-27 01:41:40,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:40,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:41:40,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100963297] [2020-10-27 01:41:40,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:41:40,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:40,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:41:40,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:41:40,351 INFO L87 Difference]: Start difference. First operand 1586 states and 2700 transitions. Second operand 12 states. [2020-10-27 01:41:41,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:41,572 INFO L93 Difference]: Finished difference Result 1658 states and 2801 transitions. [2020-10-27 01:41:41,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:41:41,573 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-27 01:41:41,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:41,576 INFO L225 Difference]: With dead ends: 1658 [2020-10-27 01:41:41,577 INFO L226 Difference]: Without dead ends: 1654 [2020-10-27 01:41:41,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:41:41,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1654 states. [2020-10-27 01:41:41,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1654 to 1605. [2020-10-27 01:41:41,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1605 states. [2020-10-27 01:41:41,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 2732 transitions. [2020-10-27 01:41:41,715 INFO L78 Accepts]: Start accepts. Automaton has 1605 states and 2732 transitions. Word has length 32 [2020-10-27 01:41:41,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:41,715 INFO L481 AbstractCegarLoop]: Abstraction has 1605 states and 2732 transitions. [2020-10-27 01:41:41,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:41:41,715 INFO L276 IsEmpty]: Start isEmpty. Operand 1605 states and 2732 transitions. [2020-10-27 01:41:41,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:41:41,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:41,716 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:41,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2020-10-27 01:41:41,717 INFO L429 AbstractCegarLoop]: === Iteration 113 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:41,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:41,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1019242315, now seen corresponding path program 4 times [2020-10-27 01:41:41,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:41,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [748863077] [2020-10-27 01:41:41,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:41,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:41,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:41,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:41,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:41,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:41,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:41,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:41,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:42,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:42,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:41:42,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:41:42,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 439 [2020-10-27 01:41:42,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:42,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:41:42,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:42,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:41:42,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:42,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:42,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:42,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:42,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:42,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:42,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:42,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:41:42,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:42,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:42,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:42,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:42,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:42,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-27 01:41:42,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:42,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:42,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:42,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:41:42,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:42,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:41:42,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:42,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:41:42,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:42,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:41:42,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:42,301 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:42,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [748863077] [2020-10-27 01:41:42,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:42,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:41:42,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334652648] [2020-10-27 01:41:42,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:41:42,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:42,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:41:42,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:41:42,304 INFO L87 Difference]: Start difference. First operand 1605 states and 2732 transitions. Second operand 11 states. [2020-10-27 01:41:43,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:43,379 INFO L93 Difference]: Finished difference Result 1650 states and 2787 transitions. [2020-10-27 01:41:43,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:41:43,380 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-27 01:41:43,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:43,383 INFO L225 Difference]: With dead ends: 1650 [2020-10-27 01:41:43,383 INFO L226 Difference]: Without dead ends: 1646 [2020-10-27 01:41:43,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:41:43,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2020-10-27 01:41:43,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 1605. [2020-10-27 01:41:43,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1605 states. [2020-10-27 01:41:43,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 2732 transitions. [2020-10-27 01:41:43,521 INFO L78 Accepts]: Start accepts. Automaton has 1605 states and 2732 transitions. Word has length 33 [2020-10-27 01:41:43,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:43,521 INFO L481 AbstractCegarLoop]: Abstraction has 1605 states and 2732 transitions. [2020-10-27 01:41:43,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:41:43,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1605 states and 2732 transitions. [2020-10-27 01:41:43,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:41:43,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:43,522 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:43,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2020-10-27 01:41:43,522 INFO L429 AbstractCegarLoop]: === Iteration 114 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:43,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:43,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1943438295, now seen corresponding path program 24 times [2020-10-27 01:41:43,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:43,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [6118623] [2020-10-27 01:41:43,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:43,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:43,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:43,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:43,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:43,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:43,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:43,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:43,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:43,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:41:43,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:41:43,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 263 [2020-10-27 01:41:43,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:43,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:41:43,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:43,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:41:43,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:43,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:43,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:43,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:43,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:43,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:43,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:43,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:41:43,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:43,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:43,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:43,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:43,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:43,933 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:43,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [6118623] [2020-10-27 01:41:43,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:43,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:41:43,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593182371] [2020-10-27 01:41:43,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:41:43,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:43,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:41:43,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:41:43,935 INFO L87 Difference]: Start difference. First operand 1605 states and 2732 transitions. Second operand 12 states. [2020-10-27 01:41:45,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:45,161 INFO L93 Difference]: Finished difference Result 1675 states and 2829 transitions. [2020-10-27 01:41:45,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:41:45,162 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-27 01:41:45,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:45,165 INFO L225 Difference]: With dead ends: 1675 [2020-10-27 01:41:45,165 INFO L226 Difference]: Without dead ends: 1671 [2020-10-27 01:41:45,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:41:45,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1671 states. [2020-10-27 01:41:45,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1671 to 1624. [2020-10-27 01:41:45,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1624 states. [2020-10-27 01:41:45,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 2764 transitions. [2020-10-27 01:41:45,324 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 2764 transitions. Word has length 32 [2020-10-27 01:41:45,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:45,324 INFO L481 AbstractCegarLoop]: Abstraction has 1624 states and 2764 transitions. [2020-10-27 01:41:45,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:41:45,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 2764 transitions. [2020-10-27 01:41:45,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:41:45,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:45,325 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:45,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2020-10-27 01:41:45,325 INFO L429 AbstractCegarLoop]: === Iteration 115 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:45,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:45,326 INFO L82 PathProgramCache]: Analyzing trace with hash 201593865, now seen corresponding path program 4 times [2020-10-27 01:41:45,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:45,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [343124105] [2020-10-27 01:41:45,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:45,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:45,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:45,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:45,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:45,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:45,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:45,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:45,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:45,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:45,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:41:45,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:41:45,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 424 [2020-10-27 01:41:45,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:45,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:41:45,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:45,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:41:45,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:45,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:45,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:45,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:45,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:45,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:45,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:45,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:41:45,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:45,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:45,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:45,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:45,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:45,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-27 01:41:45,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:45,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:45,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:45,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:41:45,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:45,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:41:45,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:45,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:41:45,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:45,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:41:45,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:45,879 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:45,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [343124105] [2020-10-27 01:41:45,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:45,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:41:45,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398738374] [2020-10-27 01:41:45,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:41:45,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:45,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:41:45,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:41:45,880 INFO L87 Difference]: Start difference. First operand 1624 states and 2764 transitions. Second operand 11 states. [2020-10-27 01:41:46,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:46,856 INFO L93 Difference]: Finished difference Result 1669 states and 2819 transitions. [2020-10-27 01:41:46,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:41:46,857 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-27 01:41:46,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:46,860 INFO L225 Difference]: With dead ends: 1669 [2020-10-27 01:41:46,860 INFO L226 Difference]: Without dead ends: 1665 [2020-10-27 01:41:46,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:41:46,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1665 states. [2020-10-27 01:41:46,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1665 to 1624. [2020-10-27 01:41:46,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1624 states. [2020-10-27 01:41:47,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 2764 transitions. [2020-10-27 01:41:47,002 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 2764 transitions. Word has length 33 [2020-10-27 01:41:47,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:47,002 INFO L481 AbstractCegarLoop]: Abstraction has 1624 states and 2764 transitions. [2020-10-27 01:41:47,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:41:47,002 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 2764 transitions. [2020-10-27 01:41:47,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:41:47,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:47,003 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:47,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2020-10-27 01:41:47,003 INFO L429 AbstractCegarLoop]: === Iteration 116 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:47,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:47,003 INFO L82 PathProgramCache]: Analyzing trace with hash 254494553, now seen corresponding path program 24 times [2020-10-27 01:41:47,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:47,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1876546071] [2020-10-27 01:41:47,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:47,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:47,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:47,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:47,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:47,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:47,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:47,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:47,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:47,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:41:47,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:41:47,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 277 [2020-10-27 01:41:47,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:47,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:41:47,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:47,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:41:47,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:47,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:47,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:47,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:47,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:47,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:47,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:47,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:41:47,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:47,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:47,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:47,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:47,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:47,433 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:47,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1876546071] [2020-10-27 01:41:47,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:47,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:41:47,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511294301] [2020-10-27 01:41:47,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:41:47,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:47,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:41:47,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:41:47,434 INFO L87 Difference]: Start difference. First operand 1624 states and 2764 transitions. Second operand 12 states. [2020-10-27 01:41:48,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:48,675 INFO L93 Difference]: Finished difference Result 1694 states and 2861 transitions. [2020-10-27 01:41:48,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:41:48,676 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-27 01:41:48,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:48,679 INFO L225 Difference]: With dead ends: 1694 [2020-10-27 01:41:48,679 INFO L226 Difference]: Without dead ends: 1690 [2020-10-27 01:41:48,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:41:48,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1690 states. [2020-10-27 01:41:48,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1690 to 1643. [2020-10-27 01:41:48,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1643 states. [2020-10-27 01:41:48,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 2796 transitions. [2020-10-27 01:41:48,820 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 2796 transitions. Word has length 32 [2020-10-27 01:41:48,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:48,820 INFO L481 AbstractCegarLoop]: Abstraction has 1643 states and 2796 transitions. [2020-10-27 01:41:48,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:41:48,820 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 2796 transitions. [2020-10-27 01:41:48,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:41:48,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:48,821 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:48,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2020-10-27 01:41:48,822 INFO L429 AbstractCegarLoop]: === Iteration 117 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:48,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:48,822 INFO L82 PathProgramCache]: Analyzing trace with hash -438011415, now seen corresponding path program 2 times [2020-10-27 01:41:48,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:48,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2064170947] [2020-10-27 01:41:48,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:48,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:48,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:48,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:48,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:48,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:48,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:49,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:49,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 01:41:49,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:41:49,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 413 [2020-10-27 01:41:49,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:49,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:41:49,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:49,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 01:41:49,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:49,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:49,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:49,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:49,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:49,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:49,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:49,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:41:49,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:49,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:49,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:49,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:49,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:49,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-27 01:41:49,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:49,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:49,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:49,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:41:49,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:49,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:41:49,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:49,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:41:49,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:49,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:41:49,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:49,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-27 01:41:49,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:49,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:49,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:49,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:41:49,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:49,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:41:49,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:49,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:41:49,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:49,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:41:49,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:49,344 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 01:41:49,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2064170947] [2020-10-27 01:41:49,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:49,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:41:49,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983955581] [2020-10-27 01:41:49,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:41:49,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:49,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:41:49,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:41:49,345 INFO L87 Difference]: Start difference. First operand 1643 states and 2796 transitions. Second operand 10 states. [2020-10-27 01:41:50,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:50,113 INFO L93 Difference]: Finished difference Result 1672 states and 2826 transitions. [2020-10-27 01:41:50,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:41:50,114 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-10-27 01:41:50,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:50,116 INFO L225 Difference]: With dead ends: 1672 [2020-10-27 01:41:50,117 INFO L226 Difference]: Without dead ends: 1668 [2020-10-27 01:41:50,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:41:50,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1668 states. [2020-10-27 01:41:50,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1668 to 1643. [2020-10-27 01:41:50,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1643 states. [2020-10-27 01:41:50,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 2796 transitions. [2020-10-27 01:41:50,280 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 2796 transitions. Word has length 34 [2020-10-27 01:41:50,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:50,280 INFO L481 AbstractCegarLoop]: Abstraction has 1643 states and 2796 transitions. [2020-10-27 01:41:50,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:41:50,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 2796 transitions. [2020-10-27 01:41:50,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:41:50,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:50,281 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:50,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2020-10-27 01:41:50,281 INFO L429 AbstractCegarLoop]: === Iteration 118 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:50,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:50,282 INFO L82 PathProgramCache]: Analyzing trace with hash -807809479, now seen corresponding path program 5 times [2020-10-27 01:41:50,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:50,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [487647603] [2020-10-27 01:41:50,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:50,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:50,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:50,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:50,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:50,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:50,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:50,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:50,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:50,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:50,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:41:50,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:41:50,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 577 [2020-10-27 01:41:50,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:50,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:41:50,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:50,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:41:50,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:50,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:50,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:50,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:50,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:50,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:50,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:50,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:41:50,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:50,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:50,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:50,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:50,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:50,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-27 01:41:50,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:50,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:50,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:50,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:41:50,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:50,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:41:50,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:50,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:41:50,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:50,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:41:50,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:50,990 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:50,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [487647603] [2020-10-27 01:41:50,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:50,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:41:50,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542787890] [2020-10-27 01:41:50,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:41:50,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:50,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:41:50,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:41:50,991 INFO L87 Difference]: Start difference. First operand 1643 states and 2796 transitions. Second operand 11 states. [2020-10-27 01:41:52,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:52,031 INFO L93 Difference]: Finished difference Result 1688 states and 2851 transitions. [2020-10-27 01:41:52,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:41:52,032 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-27 01:41:52,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:52,035 INFO L225 Difference]: With dead ends: 1688 [2020-10-27 01:41:52,035 INFO L226 Difference]: Without dead ends: 1684 [2020-10-27 01:41:52,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:41:52,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1684 states. [2020-10-27 01:41:52,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1684 to 1643. [2020-10-27 01:41:52,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1643 states. [2020-10-27 01:41:52,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 2796 transitions. [2020-10-27 01:41:52,184 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 2796 transitions. Word has length 33 [2020-10-27 01:41:52,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:52,184 INFO L481 AbstractCegarLoop]: Abstraction has 1643 states and 2796 transitions. [2020-10-27 01:41:52,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:41:52,184 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 2796 transitions. [2020-10-27 01:41:52,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:41:52,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:52,185 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:52,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2020-10-27 01:41:52,185 INFO L429 AbstractCegarLoop]: === Iteration 119 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:52,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:52,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1717729495, now seen corresponding path program 25 times [2020-10-27 01:41:52,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:52,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [449741766] [2020-10-27 01:41:52,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:52,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:52,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:52,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:52,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:52,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:52,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:52,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:52,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:52,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:41:52,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:41:52,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 286 [2020-10-27 01:41:52,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:52,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:41:52,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:52,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:41:52,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:52,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:52,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:52,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:52,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:52,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:52,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:52,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:41:52,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:52,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:52,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:52,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:52,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:52,626 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:52,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [449741766] [2020-10-27 01:41:52,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:52,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:41:52,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655520660] [2020-10-27 01:41:52,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:41:52,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:52,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:41:52,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:41:52,627 INFO L87 Difference]: Start difference. First operand 1643 states and 2796 transitions. Second operand 12 states. [2020-10-27 01:41:53,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:53,965 INFO L93 Difference]: Finished difference Result 1713 states and 2893 transitions. [2020-10-27 01:41:53,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:41:53,966 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-27 01:41:53,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:53,968 INFO L225 Difference]: With dead ends: 1713 [2020-10-27 01:41:53,968 INFO L226 Difference]: Without dead ends: 1709 [2020-10-27 01:41:53,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:41:53,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1709 states. [2020-10-27 01:41:54,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1709 to 1662. [2020-10-27 01:41:54,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1662 states. [2020-10-27 01:41:54,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 2828 transitions. [2020-10-27 01:41:54,117 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 2828 transitions. Word has length 32 [2020-10-27 01:41:54,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:54,117 INFO L481 AbstractCegarLoop]: Abstraction has 1662 states and 2828 transitions. [2020-10-27 01:41:54,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:41:54,118 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 2828 transitions. [2020-10-27 01:41:54,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:41:54,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:54,119 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:54,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2020-10-27 01:41:54,119 INFO L429 AbstractCegarLoop]: === Iteration 120 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:54,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:54,119 INFO L82 PathProgramCache]: Analyzing trace with hash -340010670, now seen corresponding path program 9 times [2020-10-27 01:41:54,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:54,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2047374753] [2020-10-27 01:41:54,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:54,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:54,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:54,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:54,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:54,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:54,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:54,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:54,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:41:54,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:41:54,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 315 [2020-10-27 01:41:54,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:54,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:41:54,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:54,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:41:54,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:54,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:54,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:54,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:54,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:54,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:54,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:54,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:41:54,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:54,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:54,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:54,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:54,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:54,567 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:54,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2047374753] [2020-10-27 01:41:54,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:54,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:41:54,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992582746] [2020-10-27 01:41:54,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:41:54,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:54,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:41:54,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:41:54,569 INFO L87 Difference]: Start difference. First operand 1662 states and 2828 transitions. Second operand 11 states. [2020-10-27 01:41:55,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:55,689 INFO L93 Difference]: Finished difference Result 1718 states and 2904 transitions. [2020-10-27 01:41:55,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:41:55,690 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-27 01:41:55,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:55,692 INFO L225 Difference]: With dead ends: 1718 [2020-10-27 01:41:55,693 INFO L226 Difference]: Without dead ends: 1714 [2020-10-27 01:41:55,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:41:55,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2020-10-27 01:41:55,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1679. [2020-10-27 01:41:55,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1679 states. [2020-10-27 01:41:55,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1679 states to 1679 states and 2858 transitions. [2020-10-27 01:41:55,877 INFO L78 Accepts]: Start accepts. Automaton has 1679 states and 2858 transitions. Word has length 32 [2020-10-27 01:41:55,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:55,877 INFO L481 AbstractCegarLoop]: Abstraction has 1679 states and 2858 transitions. [2020-10-27 01:41:55,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:41:55,877 INFO L276 IsEmpty]: Start isEmpty. Operand 1679 states and 2858 transitions. [2020-10-27 01:41:55,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:41:55,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:55,879 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:55,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2020-10-27 01:41:55,879 INFO L429 AbstractCegarLoop]: === Iteration 121 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:55,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:55,879 INFO L82 PathProgramCache]: Analyzing trace with hash -958100910, now seen corresponding path program 10 times [2020-10-27 01:41:55,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:55,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894312161] [2020-10-27 01:41:55,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:55,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:55,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:55,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:55,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:55,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:55,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:56,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:56,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:41:56,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:41:56,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 249 [2020-10-27 01:41:56,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:56,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:41:56,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:56,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:41:56,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:56,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:56,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:56,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:56,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:56,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:56,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:56,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:41:56,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:56,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:56,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:56,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:56,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:56,260 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:56,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1894312161] [2020-10-27 01:41:56,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:56,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:41:56,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759586153] [2020-10-27 01:41:56,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:41:56,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:56,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:41:56,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:41:56,261 INFO L87 Difference]: Start difference. First operand 1679 states and 2858 transitions. Second operand 11 states. [2020-10-27 01:41:57,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:57,388 INFO L93 Difference]: Finished difference Result 1742 states and 2947 transitions. [2020-10-27 01:41:57,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:41:57,389 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-27 01:41:57,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:57,392 INFO L225 Difference]: With dead ends: 1742 [2020-10-27 01:41:57,392 INFO L226 Difference]: Without dead ends: 1738 [2020-10-27 01:41:57,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:41:57,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2020-10-27 01:41:57,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1704. [2020-10-27 01:41:57,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1704 states. [2020-10-27 01:41:57,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1704 states to 1704 states and 2902 transitions. [2020-10-27 01:41:57,546 INFO L78 Accepts]: Start accepts. Automaton has 1704 states and 2902 transitions. Word has length 32 [2020-10-27 01:41:57,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:57,546 INFO L481 AbstractCegarLoop]: Abstraction has 1704 states and 2902 transitions. [2020-10-27 01:41:57,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:41:57,546 INFO L276 IsEmpty]: Start isEmpty. Operand 1704 states and 2902 transitions. [2020-10-27 01:41:57,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:41:57,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:57,547 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:57,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2020-10-27 01:41:57,547 INFO L429 AbstractCegarLoop]: === Iteration 122 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:57,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:57,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1351127920, now seen corresponding path program 11 times [2020-10-27 01:41:57,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:57,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1162040652] [2020-10-27 01:41:57,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:57,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:57,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:57,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:57,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:57,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:57,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:57,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:57,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:41:57,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:41:57,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 278 [2020-10-27 01:41:57,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:57,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:41:57,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:57,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:41:57,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:57,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:57,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:57,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:57,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:57,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:57,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:57,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:41:57,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:57,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:57,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:57,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:57,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:57,961 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:57,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1162040652] [2020-10-27 01:41:57,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:57,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:41:57,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332787997] [2020-10-27 01:41:57,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:41:57,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:57,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:41:57,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:41:57,963 INFO L87 Difference]: Start difference. First operand 1704 states and 2902 transitions. Second operand 11 states. [2020-10-27 01:41:59,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:59,167 INFO L93 Difference]: Finished difference Result 1776 states and 3002 transitions. [2020-10-27 01:41:59,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:41:59,168 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-27 01:41:59,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:59,171 INFO L225 Difference]: With dead ends: 1776 [2020-10-27 01:41:59,171 INFO L226 Difference]: Without dead ends: 1772 [2020-10-27 01:41:59,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:41:59,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1772 states. [2020-10-27 01:41:59,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1772 to 1728. [2020-10-27 01:41:59,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1728 states. [2020-10-27 01:41:59,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1728 states to 1728 states and 2944 transitions. [2020-10-27 01:41:59,343 INFO L78 Accepts]: Start accepts. Automaton has 1728 states and 2944 transitions. Word has length 32 [2020-10-27 01:41:59,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:59,343 INFO L481 AbstractCegarLoop]: Abstraction has 1728 states and 2944 transitions. [2020-10-27 01:41:59,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:41:59,343 INFO L276 IsEmpty]: Start isEmpty. Operand 1728 states and 2944 transitions. [2020-10-27 01:41:59,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:41:59,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:59,344 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:59,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2020-10-27 01:41:59,344 INFO L429 AbstractCegarLoop]: === Iteration 123 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:59,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:59,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1941128366, now seen corresponding path program 12 times [2020-10-27 01:41:59,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:59,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1091223526] [2020-10-27 01:41:59,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:59,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:59,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:59,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:59,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:59,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:59,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:59,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:59,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:41:59,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:41:59,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 244 [2020-10-27 01:41:59,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:59,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:41:59,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:59,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:41:59,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:59,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:59,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:59,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:59,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:59,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:59,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:59,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:41:59,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:59,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:59,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:59,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:59,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:59,720 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:59,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1091223526] [2020-10-27 01:41:59,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:59,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:41:59,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026965658] [2020-10-27 01:41:59,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:41:59,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:59,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:41:59,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:41:59,721 INFO L87 Difference]: Start difference. First operand 1728 states and 2944 transitions. Second operand 11 states. [2020-10-27 01:42:00,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:00,849 INFO L93 Difference]: Finished difference Result 1782 states and 3017 transitions. [2020-10-27 01:42:00,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:42:00,850 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-27 01:42:00,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:00,853 INFO L225 Difference]: With dead ends: 1782 [2020-10-27 01:42:00,853 INFO L226 Difference]: Without dead ends: 1778 [2020-10-27 01:42:00,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:42:00,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1778 states. [2020-10-27 01:42:01,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1778 to 1744. [2020-10-27 01:42:01,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1744 states. [2020-10-27 01:42:01,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1744 states to 1744 states and 2972 transitions. [2020-10-27 01:42:01,097 INFO L78 Accepts]: Start accepts. Automaton has 1744 states and 2972 transitions. Word has length 32 [2020-10-27 01:42:01,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:01,098 INFO L481 AbstractCegarLoop]: Abstraction has 1744 states and 2972 transitions. [2020-10-27 01:42:01,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:42:01,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1744 states and 2972 transitions. [2020-10-27 01:42:01,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:42:01,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:01,100 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:01,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2020-10-27 01:42:01,100 INFO L429 AbstractCegarLoop]: === Iteration 124 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:01,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:01,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1342721680, now seen corresponding path program 13 times [2020-10-27 01:42:01,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:01,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [85367399] [2020-10-27 01:42:01,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:01,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:01,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:01,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:01,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:01,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:01,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:01,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:01,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:42:01,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:42:01,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 299 [2020-10-27 01:42:01,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:01,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:42:01,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:01,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:42:01,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:01,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:01,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:01,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:01,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:01,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:01,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:01,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:42:01,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:01,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:01,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:01,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:01,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:01,531 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:01,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [85367399] [2020-10-27 01:42:01,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:01,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:42:01,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551239821] [2020-10-27 01:42:01,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:42:01,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:01,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:42:01,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:42:01,532 INFO L87 Difference]: Start difference. First operand 1744 states and 2972 transitions. Second operand 11 states. [2020-10-27 01:42:02,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:02,697 INFO L93 Difference]: Finished difference Result 1812 states and 3068 transitions. [2020-10-27 01:42:02,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:42:02,697 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-27 01:42:02,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:02,700 INFO L225 Difference]: With dead ends: 1812 [2020-10-27 01:42:02,700 INFO L226 Difference]: Without dead ends: 1808 [2020-10-27 01:42:02,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:42:02,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1808 states. [2020-10-27 01:42:02,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1808 to 1766. [2020-10-27 01:42:02,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1766 states. [2020-10-27 01:42:02,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1766 states to 1766 states and 3011 transitions. [2020-10-27 01:42:02,935 INFO L78 Accepts]: Start accepts. Automaton has 1766 states and 3011 transitions. Word has length 32 [2020-10-27 01:42:02,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:02,935 INFO L481 AbstractCegarLoop]: Abstraction has 1766 states and 3011 transitions. [2020-10-27 01:42:02,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:42:02,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1766 states and 3011 transitions. [2020-10-27 01:42:02,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:42:02,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:02,936 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:02,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2020-10-27 01:42:02,936 INFO L429 AbstractCegarLoop]: === Iteration 125 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:02,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:02,937 INFO L82 PathProgramCache]: Analyzing trace with hash 949694670, now seen corresponding path program 14 times [2020-10-27 01:42:02,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:02,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842560962] [2020-10-27 01:42:02,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:02,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:02,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:02,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:02,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:02,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:02,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:03,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:03,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:42:03,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:42:03,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 237 [2020-10-27 01:42:03,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:03,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:42:03,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:03,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:42:03,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:03,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:03,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:03,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:03,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:03,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:03,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:03,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:42:03,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:03,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:03,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:03,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:03,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:03,315 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:03,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842560962] [2020-10-27 01:42:03,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:03,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:42:03,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849256412] [2020-10-27 01:42:03,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:42:03,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:03,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:42:03,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:42:03,316 INFO L87 Difference]: Start difference. First operand 1766 states and 3011 transitions. Second operand 11 states. [2020-10-27 01:42:04,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:04,479 INFO L93 Difference]: Finished difference Result 1820 states and 3084 transitions. [2020-10-27 01:42:04,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:42:04,480 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-27 01:42:04,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:04,484 INFO L225 Difference]: With dead ends: 1820 [2020-10-27 01:42:04,484 INFO L226 Difference]: Without dead ends: 1816 [2020-10-27 01:42:04,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:42:04,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1816 states. [2020-10-27 01:42:04,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1816 to 1782. [2020-10-27 01:42:04,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1782 states. [2020-10-27 01:42:04,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1782 states to 1782 states and 3039 transitions. [2020-10-27 01:42:04,679 INFO L78 Accepts]: Start accepts. Automaton has 1782 states and 3039 transitions. Word has length 32 [2020-10-27 01:42:04,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:04,679 INFO L481 AbstractCegarLoop]: Abstraction has 1782 states and 3039 transitions. [2020-10-27 01:42:04,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:42:04,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1782 states and 3039 transitions. [2020-10-27 01:42:04,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:42:04,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:04,681 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:04,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2020-10-27 01:42:04,681 INFO L429 AbstractCegarLoop]: === Iteration 126 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:04,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:04,681 INFO L82 PathProgramCache]: Analyzing trace with hash -572024921, now seen corresponding path program 2 times [2020-10-27 01:42:04,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:04,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1950568113] [2020-10-27 01:42:04,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:04,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:04,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:04,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:04,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:04,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:04,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:05,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:05,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 01:42:05,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:42:05,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 625 [2020-10-27 01:42:05,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:05,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:42:05,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:05,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 01:42:05,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:05,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:05,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:05,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:05,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:05,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:05,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:05,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:42:05,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:05,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:05,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:05,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:05,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:05,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-27 01:42:05,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:05,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:05,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:05,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:42:05,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:05,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:42:05,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:05,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:42:05,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:05,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:42:05,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:05,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-27 01:42:05,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:05,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:05,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:05,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:42:05,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:05,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:42:05,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:05,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:42:05,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:05,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:42:05,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:05,429 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 01:42:05,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1950568113] [2020-10-27 01:42:05,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:05,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:42:05,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6096693] [2020-10-27 01:42:05,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:42:05,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:05,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:42:05,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:42:05,431 INFO L87 Difference]: Start difference. First operand 1782 states and 3039 transitions. Second operand 10 states. [2020-10-27 01:42:06,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:06,294 INFO L93 Difference]: Finished difference Result 1811 states and 3069 transitions. [2020-10-27 01:42:06,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:42:06,295 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-10-27 01:42:06,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:06,298 INFO L225 Difference]: With dead ends: 1811 [2020-10-27 01:42:06,298 INFO L226 Difference]: Without dead ends: 1807 [2020-10-27 01:42:06,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:42:06,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2020-10-27 01:42:06,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 1782. [2020-10-27 01:42:06,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1782 states. [2020-10-27 01:42:06,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1782 states to 1782 states and 3039 transitions. [2020-10-27 01:42:06,478 INFO L78 Accepts]: Start accepts. Automaton has 1782 states and 3039 transitions. Word has length 34 [2020-10-27 01:42:06,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:06,478 INFO L481 AbstractCegarLoop]: Abstraction has 1782 states and 3039 transitions. [2020-10-27 01:42:06,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:42:06,478 INFO L276 IsEmpty]: Start isEmpty. Operand 1782 states and 3039 transitions. [2020-10-27 01:42:06,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:42:06,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:06,479 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:06,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2020-10-27 01:42:06,479 INFO L429 AbstractCegarLoop]: === Iteration 127 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:06,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:06,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1681719483, now seen corresponding path program 5 times [2020-10-27 01:42:06,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:06,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234568827] [2020-10-27 01:42:06,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:06,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:06,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:06,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:06,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:06,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:06,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:06,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:06,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:06,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:06,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:42:06,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:42:06,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 430 [2020-10-27 01:42:06,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:06,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:42:06,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:06,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:42:06,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:07,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:07,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:07,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:07,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:07,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:07,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:07,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:42:07,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:07,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:07,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:07,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:07,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:07,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-27 01:42:07,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:07,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:07,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:07,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:42:07,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:07,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:42:07,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:07,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:42:07,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:07,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:42:07,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:07,053 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:07,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234568827] [2020-10-27 01:42:07,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:07,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:42:07,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681576179] [2020-10-27 01:42:07,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:42:07,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:07,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:42:07,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:42:07,054 INFO L87 Difference]: Start difference. First operand 1782 states and 3039 transitions. Second operand 11 states. [2020-10-27 01:42:08,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:08,219 INFO L93 Difference]: Finished difference Result 1827 states and 3094 transitions. [2020-10-27 01:42:08,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:42:08,220 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-27 01:42:08,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:08,223 INFO L225 Difference]: With dead ends: 1827 [2020-10-27 01:42:08,223 INFO L226 Difference]: Without dead ends: 1823 [2020-10-27 01:42:08,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:42:08,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1823 states. [2020-10-27 01:42:08,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1823 to 1782. [2020-10-27 01:42:08,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1782 states. [2020-10-27 01:42:08,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1782 states to 1782 states and 3039 transitions. [2020-10-27 01:42:08,398 INFO L78 Accepts]: Start accepts. Automaton has 1782 states and 3039 transitions. Word has length 33 [2020-10-27 01:42:08,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:08,398 INFO L481 AbstractCegarLoop]: Abstraction has 1782 states and 3039 transitions. [2020-10-27 01:42:08,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:42:08,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1782 states and 3039 transitions. [2020-10-27 01:42:08,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:42:08,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:08,400 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:08,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2020-10-27 01:42:08,400 INFO L429 AbstractCegarLoop]: === Iteration 128 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:08,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:08,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1498874777, now seen corresponding path program 25 times [2020-10-27 01:42:08,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:08,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787238755] [2020-10-27 01:42:08,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:08,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:08,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:08,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:08,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:08,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:08,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:08,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:08,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:08,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:42:08,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:42:08,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 279 [2020-10-27 01:42:08,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:08,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:42:08,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:08,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:42:08,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:08,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:08,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:08,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:08,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:08,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:08,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:08,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:42:08,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:08,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:08,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:08,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:08,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:08,846 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:08,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787238755] [2020-10-27 01:42:08,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:08,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:42:08,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569788220] [2020-10-27 01:42:08,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:42:08,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:08,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:42:08,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:42:08,849 INFO L87 Difference]: Start difference. First operand 1782 states and 3039 transitions. Second operand 12 states. [2020-10-27 01:42:10,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:10,361 INFO L93 Difference]: Finished difference Result 1852 states and 3136 transitions. [2020-10-27 01:42:10,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:42:10,362 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-27 01:42:10,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:10,366 INFO L225 Difference]: With dead ends: 1852 [2020-10-27 01:42:10,366 INFO L226 Difference]: Without dead ends: 1848 [2020-10-27 01:42:10,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:42:10,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1848 states. [2020-10-27 01:42:10,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1848 to 1801. [2020-10-27 01:42:10,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1801 states. [2020-10-27 01:42:10,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1801 states to 1801 states and 3071 transitions. [2020-10-27 01:42:10,568 INFO L78 Accepts]: Start accepts. Automaton has 1801 states and 3071 transitions. Word has length 32 [2020-10-27 01:42:10,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:10,569 INFO L481 AbstractCegarLoop]: Abstraction has 1801 states and 3071 transitions. [2020-10-27 01:42:10,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:42:10,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1801 states and 3071 transitions. [2020-10-27 01:42:10,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:42:10,570 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:10,570 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:10,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2020-10-27 01:42:10,571 INFO L429 AbstractCegarLoop]: === Iteration 129 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:10,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:10,571 INFO L82 PathProgramCache]: Analyzing trace with hash 271871058, now seen corresponding path program 15 times [2020-10-27 01:42:10,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:10,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523611311] [2020-10-27 01:42:10,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:10,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:10,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:10,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:10,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:10,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:10,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:10,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:10,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:42:10,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:42:10,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 239 [2020-10-27 01:42:10,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:10,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:42:10,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:10,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:42:10,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:10,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:10,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:10,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:10,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:10,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:10,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:10,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:42:10,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:10,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:10,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:10,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:10,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:10,944 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:10,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523611311] [2020-10-27 01:42:10,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:10,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:42:10,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636280083] [2020-10-27 01:42:10,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:42:10,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:10,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:42:10,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:42:10,945 INFO L87 Difference]: Start difference. First operand 1801 states and 3071 transitions. Second operand 11 states. [2020-10-27 01:42:12,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:12,201 INFO L93 Difference]: Finished difference Result 1856 states and 3146 transitions. [2020-10-27 01:42:12,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:42:12,202 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-27 01:42:12,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:12,205 INFO L225 Difference]: With dead ends: 1856 [2020-10-27 01:42:12,205 INFO L226 Difference]: Without dead ends: 1852 [2020-10-27 01:42:12,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:42:12,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1852 states. [2020-10-27 01:42:12,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1852 to 1818. [2020-10-27 01:42:12,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1818 states. [2020-10-27 01:42:12,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 3101 transitions. [2020-10-27 01:42:12,380 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 3101 transitions. Word has length 32 [2020-10-27 01:42:12,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:12,380 INFO L481 AbstractCegarLoop]: Abstraction has 1818 states and 3101 transitions. [2020-10-27 01:42:12,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:42:12,380 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 3101 transitions. [2020-10-27 01:42:12,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:42:12,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:12,382 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:12,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2020-10-27 01:42:12,382 INFO L429 AbstractCegarLoop]: === Iteration 130 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:12,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:12,382 INFO L82 PathProgramCache]: Analyzing trace with hash -121155952, now seen corresponding path program 16 times [2020-10-27 01:42:12,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:12,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [305479046] [2020-10-27 01:42:12,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:12,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:12,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:12,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:12,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:12,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:12,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:12,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:12,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:42:12,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:42:12,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 264 [2020-10-27 01:42:12,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:12,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:42:12,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:12,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:42:12,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:12,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:12,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:12,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:12,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:12,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:12,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:12,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:42:12,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:12,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:12,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:12,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:12,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:12,790 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:12,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [305479046] [2020-10-27 01:42:12,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:12,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:42:12,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195497973] [2020-10-27 01:42:12,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:42:12,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:12,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:42:12,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:42:12,791 INFO L87 Difference]: Start difference. First operand 1818 states and 3101 transitions. Second operand 11 states. [2020-10-27 01:42:14,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:14,115 INFO L93 Difference]: Finished difference Result 1885 states and 3195 transitions. [2020-10-27 01:42:14,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:42:14,116 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-27 01:42:14,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:14,119 INFO L225 Difference]: With dead ends: 1885 [2020-10-27 01:42:14,119 INFO L226 Difference]: Without dead ends: 1881 [2020-10-27 01:42:14,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:42:14,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1881 states. [2020-10-27 01:42:14,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1881 to 1839. [2020-10-27 01:42:14,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1839 states. [2020-10-27 01:42:14,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1839 states to 1839 states and 3138 transitions. [2020-10-27 01:42:14,335 INFO L78 Accepts]: Start accepts. Automaton has 1839 states and 3138 transitions. Word has length 32 [2020-10-27 01:42:14,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:14,335 INFO L481 AbstractCegarLoop]: Abstraction has 1839 states and 3138 transitions. [2020-10-27 01:42:14,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:42:14,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1839 states and 3138 transitions. [2020-10-27 01:42:14,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:42:14,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:14,336 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:14,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2020-10-27 01:42:14,336 INFO L429 AbstractCegarLoop]: === Iteration 131 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:14,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:14,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1132273202, now seen corresponding path program 17 times [2020-10-27 01:42:14,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:14,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892434655] [2020-10-27 01:42:14,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:14,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:14,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:14,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:14,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:14,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:14,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:14,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:14,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:42:14,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:42:14,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 235 [2020-10-27 01:42:14,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:14,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:42:14,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:14,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:42:14,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:14,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:14,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:14,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:14,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:14,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:14,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:14,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:42:14,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:14,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:14,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:14,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:14,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:14,716 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:14,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1892434655] [2020-10-27 01:42:14,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:14,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:42:14,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090904863] [2020-10-27 01:42:14,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:42:14,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:14,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:42:14,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:42:14,718 INFO L87 Difference]: Start difference. First operand 1839 states and 3138 transitions. Second operand 11 states. [2020-10-27 01:42:15,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:16,000 INFO L93 Difference]: Finished difference Result 1897 states and 3218 transitions. [2020-10-27 01:42:16,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:42:16,001 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-27 01:42:16,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:16,004 INFO L225 Difference]: With dead ends: 1897 [2020-10-27 01:42:16,004 INFO L226 Difference]: Without dead ends: 1893 [2020-10-27 01:42:16,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:42:16,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1893 states. [2020-10-27 01:42:16,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1893 to 1859. [2020-10-27 01:42:16,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1859 states. [2020-10-27 01:42:16,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1859 states to 1859 states and 3173 transitions. [2020-10-27 01:42:16,181 INFO L78 Accepts]: Start accepts. Automaton has 1859 states and 3173 transitions. Word has length 32 [2020-10-27 01:42:16,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:16,181 INFO L481 AbstractCegarLoop]: Abstraction has 1859 states and 3173 transitions. [2020-10-27 01:42:16,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:42:16,181 INFO L276 IsEmpty]: Start isEmpty. Operand 1859 states and 3173 transitions. [2020-10-27 01:42:16,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:42:16,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:16,183 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:16,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2020-10-27 01:42:16,183 INFO L429 AbstractCegarLoop]: === Iteration 132 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:16,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:16,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1722273648, now seen corresponding path program 18 times [2020-10-27 01:42:16,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:16,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1786059383] [2020-10-27 01:42:16,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:16,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:16,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:16,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:16,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:16,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:16,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:16,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:16,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:42:16,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:42:16,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 266 [2020-10-27 01:42:16,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:16,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:42:16,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:16,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:42:16,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:16,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:16,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:16,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:16,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:16,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:16,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:16,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:42:16,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:16,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:16,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:16,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:16,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:16,590 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:16,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1786059383] [2020-10-27 01:42:16,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:16,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:42:16,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310245776] [2020-10-27 01:42:16,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:42:16,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:16,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:42:16,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:42:16,591 INFO L87 Difference]: Start difference. First operand 1859 states and 3173 transitions. Second operand 11 states. [2020-10-27 01:42:17,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:17,907 INFO L93 Difference]: Finished difference Result 1932 states and 3275 transitions. [2020-10-27 01:42:17,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:42:17,908 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-27 01:42:17,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:17,911 INFO L225 Difference]: With dead ends: 1932 [2020-10-27 01:42:17,911 INFO L226 Difference]: Without dead ends: 1928 [2020-10-27 01:42:17,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:42:17,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2020-10-27 01:42:18,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1884. [2020-10-27 01:42:18,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1884 states. [2020-10-27 01:42:18,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1884 states to 1884 states and 3217 transitions. [2020-10-27 01:42:18,125 INFO L78 Accepts]: Start accepts. Automaton has 1884 states and 3217 transitions. Word has length 32 [2020-10-27 01:42:18,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:18,125 INFO L481 AbstractCegarLoop]: Abstraction has 1884 states and 3217 transitions. [2020-10-27 01:42:18,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:42:18,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1884 states and 3217 transitions. [2020-10-27 01:42:18,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:42:18,127 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:18,127 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:18,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2020-10-27 01:42:18,127 INFO L429 AbstractCegarLoop]: === Iteration 133 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:18,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:18,127 INFO L82 PathProgramCache]: Analyzing trace with hash -2115300658, now seen corresponding path program 19 times [2020-10-27 01:42:18,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:18,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [694427825] [2020-10-27 01:42:18,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:18,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:18,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:18,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:18,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:18,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:18,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:18,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:18,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:42:18,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:42:18,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 240 [2020-10-27 01:42:18,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:18,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:42:18,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:18,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:42:18,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:18,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:18,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:18,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:18,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:18,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:18,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:18,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:42:18,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:18,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:18,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:18,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:18,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:18,498 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:18,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [694427825] [2020-10-27 01:42:18,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:18,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:42:18,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011985086] [2020-10-27 01:42:18,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:42:18,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:18,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:42:18,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:42:18,500 INFO L87 Difference]: Start difference. First operand 1884 states and 3217 transitions. Second operand 11 states. [2020-10-27 01:42:19,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:19,797 INFO L93 Difference]: Finished difference Result 1942 states and 3297 transitions. [2020-10-27 01:42:19,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:42:19,799 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-27 01:42:19,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:19,801 INFO L225 Difference]: With dead ends: 1942 [2020-10-27 01:42:19,802 INFO L226 Difference]: Without dead ends: 1938 [2020-10-27 01:42:19,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:42:19,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1938 states. [2020-10-27 01:42:19,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1938 to 1904. [2020-10-27 01:42:19,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1904 states. [2020-10-27 01:42:19,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1904 states to 1904 states and 3252 transitions. [2020-10-27 01:42:19,987 INFO L78 Accepts]: Start accepts. Automaton has 1904 states and 3252 transitions. Word has length 32 [2020-10-27 01:42:19,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:19,988 INFO L481 AbstractCegarLoop]: Abstraction has 1904 states and 3252 transitions. [2020-10-27 01:42:19,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:42:19,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1904 states and 3252 transitions. [2020-10-27 01:42:19,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:42:19,989 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:19,989 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:19,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2020-10-27 01:42:19,989 INFO L429 AbstractCegarLoop]: === Iteration 134 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:19,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:19,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1561576398, now seen corresponding path program 20 times [2020-10-27 01:42:19,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:19,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [951289953] [2020-10-27 01:42:19,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:19,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:19,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:20,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:20,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:20,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:20,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:20,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:20,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:42:20,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:42:20,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 249 [2020-10-27 01:42:20,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:20,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:42:20,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:20,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:42:20,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:20,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:20,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:20,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:20,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:20,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:20,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:20,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:42:20,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:20,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:20,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:20,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:20,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:20,381 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:20,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [951289953] [2020-10-27 01:42:20,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:20,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:42:20,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178418717] [2020-10-27 01:42:20,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:42:20,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:20,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:42:20,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:42:20,382 INFO L87 Difference]: Start difference. First operand 1904 states and 3252 transitions. Second operand 11 states. [2020-10-27 01:42:21,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:21,650 INFO L93 Difference]: Finished difference Result 1960 states and 3328 transitions. [2020-10-27 01:42:21,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:42:21,651 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-27 01:42:21,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:21,654 INFO L225 Difference]: With dead ends: 1960 [2020-10-27 01:42:21,654 INFO L226 Difference]: Without dead ends: 1956 [2020-10-27 01:42:21,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:42:21,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1956 states. [2020-10-27 01:42:21,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1956 to 1921. [2020-10-27 01:42:21,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1921 states. [2020-10-27 01:42:21,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1921 states to 1921 states and 3282 transitions. [2020-10-27 01:42:21,854 INFO L78 Accepts]: Start accepts. Automaton has 1921 states and 3282 transitions. Word has length 32 [2020-10-27 01:42:21,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:21,854 INFO L481 AbstractCegarLoop]: Abstraction has 1921 states and 3282 transitions. [2020-10-27 01:42:21,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:42:21,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1921 states and 3282 transitions. [2020-10-27 01:42:21,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:42:21,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:21,855 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:21,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2020-10-27 01:42:21,856 INFO L429 AbstractCegarLoop]: === Iteration 135 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:21,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:21,856 INFO L82 PathProgramCache]: Analyzing trace with hash -451423149, now seen corresponding path program 26 times [2020-10-27 01:42:21,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:21,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1904334478] [2020-10-27 01:42:21,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:21,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:21,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:21,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:21,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:21,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:21,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:21,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:22,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:22,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:42:22,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:42:22,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 290 [2020-10-27 01:42:22,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:22,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:42:22,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:22,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:42:22,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:22,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:22,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:22,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:22,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:22,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:22,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:22,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:42:22,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:22,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:22,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:22,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:22,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:22,315 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:22,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1904334478] [2020-10-27 01:42:22,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:22,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:42:22,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364446770] [2020-10-27 01:42:22,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:42:22,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:22,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:42:22,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:42:22,317 INFO L87 Difference]: Start difference. First operand 1921 states and 3282 transitions. Second operand 12 states. [2020-10-27 01:42:23,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:23,755 INFO L93 Difference]: Finished difference Result 1987 states and 3372 transitions. [2020-10-27 01:42:23,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:42:23,756 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-10-27 01:42:23,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:23,759 INFO L225 Difference]: With dead ends: 1987 [2020-10-27 01:42:23,759 INFO L226 Difference]: Without dead ends: 1983 [2020-10-27 01:42:23,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:42:23,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1983 states. [2020-10-27 01:42:23,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1983 to 1938. [2020-10-27 01:42:23,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1938 states. [2020-10-27 01:42:23,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1938 states to 1938 states and 3311 transitions. [2020-10-27 01:42:23,946 INFO L78 Accepts]: Start accepts. Automaton has 1938 states and 3311 transitions. Word has length 33 [2020-10-27 01:42:23,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:23,946 INFO L481 AbstractCegarLoop]: Abstraction has 1938 states and 3311 transitions. [2020-10-27 01:42:23,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:42:23,946 INFO L276 IsEmpty]: Start isEmpty. Operand 1938 states and 3311 transitions. [2020-10-27 01:42:23,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:42:23,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:23,947 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:23,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2020-10-27 01:42:23,947 INFO L429 AbstractCegarLoop]: === Iteration 136 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:23,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:23,948 INFO L82 PathProgramCache]: Analyzing trace with hash -844450159, now seen corresponding path program 43 times [2020-10-27 01:42:23,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:23,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144141213] [2020-10-27 01:42:23,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:23,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:23,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:23,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:24,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:24,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:24,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:24,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:24,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:24,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:42:24,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:42:24,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 303 [2020-10-27 01:42:24,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:24,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:42:24,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:24,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:42:24,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:24,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:24,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:24,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:24,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:24,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:24,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:24,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:42:24,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:24,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:24,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:24,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:24,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:24,459 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:24,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144141213] [2020-10-27 01:42:24,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:24,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:42:24,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056760937] [2020-10-27 01:42:24,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:42:24,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:24,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:42:24,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:42:24,461 INFO L87 Difference]: Start difference. First operand 1938 states and 3311 transitions. Second operand 12 states. [2020-10-27 01:42:25,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:25,954 INFO L93 Difference]: Finished difference Result 2005 states and 3403 transitions. [2020-10-27 01:42:25,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:42:25,955 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-10-27 01:42:25,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:25,958 INFO L225 Difference]: With dead ends: 2005 [2020-10-27 01:42:25,958 INFO L226 Difference]: Without dead ends: 2001 [2020-10-27 01:42:25,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:42:25,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2001 states. [2020-10-27 01:42:26,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2001 to 1956. [2020-10-27 01:42:26,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1956 states. [2020-10-27 01:42:26,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1956 states to 1956 states and 3342 transitions. [2020-10-27 01:42:26,165 INFO L78 Accepts]: Start accepts. Automaton has 1956 states and 3342 transitions. Word has length 33 [2020-10-27 01:42:26,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:26,166 INFO L481 AbstractCegarLoop]: Abstraction has 1956 states and 3342 transitions. [2020-10-27 01:42:26,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:42:26,166 INFO L276 IsEmpty]: Start isEmpty. Operand 1956 states and 3342 transitions. [2020-10-27 01:42:26,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:42:26,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:26,167 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:26,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2020-10-27 01:42:26,167 INFO L429 AbstractCegarLoop]: === Iteration 137 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:26,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:26,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1462540399, now seen corresponding path program 44 times [2020-10-27 01:42:26,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:26,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [236110443] [2020-10-27 01:42:26,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:26,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:26,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:26,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:26,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:26,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:26,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:26,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:26,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:26,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:42:26,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:42:26,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 296 [2020-10-27 01:42:26,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:26,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:42:26,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:26,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:42:26,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:26,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:26,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:26,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:26,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:26,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:26,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:26,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:42:26,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:26,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:26,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:26,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:26,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:26,635 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:26,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [236110443] [2020-10-27 01:42:26,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:26,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:42:26,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888863812] [2020-10-27 01:42:26,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:42:26,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:26,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:42:26,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:42:26,636 INFO L87 Difference]: Start difference. First operand 1956 states and 3342 transitions. Second operand 12 states. [2020-10-27 01:42:28,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:28,103 INFO L93 Difference]: Finished difference Result 2022 states and 3432 transitions. [2020-10-27 01:42:28,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:42:28,104 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-10-27 01:42:28,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:28,108 INFO L225 Difference]: With dead ends: 2022 [2020-10-27 01:42:28,108 INFO L226 Difference]: Without dead ends: 2018 [2020-10-27 01:42:28,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:42:28,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2018 states. [2020-10-27 01:42:28,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2018 to 1973. [2020-10-27 01:42:28,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1973 states. [2020-10-27 01:42:28,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1973 states to 1973 states and 3371 transitions. [2020-10-27 01:42:28,302 INFO L78 Accepts]: Start accepts. Automaton has 1973 states and 3371 transitions. Word has length 33 [2020-10-27 01:42:28,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:28,303 INFO L481 AbstractCegarLoop]: Abstraction has 1973 states and 3371 transitions. [2020-10-27 01:42:28,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:42:28,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1973 states and 3371 transitions. [2020-10-27 01:42:28,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:42:28,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:28,304 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:28,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2020-10-27 01:42:28,304 INFO L429 AbstractCegarLoop]: === Iteration 138 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:28,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:28,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1855567409, now seen corresponding path program 26 times [2020-10-27 01:42:28,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:28,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [10634126] [2020-10-27 01:42:28,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:28,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:28,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:28,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:28,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:28,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:28,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:28,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:28,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:28,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:42:28,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:42:28,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 311 [2020-10-27 01:42:28,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:28,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:42:28,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:28,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:42:28,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:28,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:28,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:28,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:28,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:28,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:28,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:28,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:42:28,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:28,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:28,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:28,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:28,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:28,784 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:28,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [10634126] [2020-10-27 01:42:28,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:28,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:42:28,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829269112] [2020-10-27 01:42:28,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:42:28,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:28,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:42:28,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:42:28,786 INFO L87 Difference]: Start difference. First operand 1973 states and 3371 transitions. Second operand 12 states. [2020-10-27 01:42:30,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:30,254 INFO L93 Difference]: Finished difference Result 2040 states and 3463 transitions. [2020-10-27 01:42:30,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:42:30,255 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-10-27 01:42:30,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:30,259 INFO L225 Difference]: With dead ends: 2040 [2020-10-27 01:42:30,259 INFO L226 Difference]: Without dead ends: 2036 [2020-10-27 01:42:30,260 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:42:30,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2036 states. [2020-10-27 01:42:30,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2036 to 1991. [2020-10-27 01:42:30,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1991 states. [2020-10-27 01:42:30,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1991 states to 1991 states and 3402 transitions. [2020-10-27 01:42:30,473 INFO L78 Accepts]: Start accepts. Automaton has 1991 states and 3402 transitions. Word has length 33 [2020-10-27 01:42:30,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:30,473 INFO L481 AbstractCegarLoop]: Abstraction has 1991 states and 3402 transitions. [2020-10-27 01:42:30,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:42:30,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1991 states and 3402 transitions. [2020-10-27 01:42:30,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:42:30,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:30,475 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:30,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2020-10-27 01:42:30,475 INFO L429 AbstractCegarLoop]: === Iteration 139 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:30,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:30,476 INFO L82 PathProgramCache]: Analyzing trace with hash -2058582591, now seen corresponding path program 27 times [2020-10-27 01:42:30,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:30,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [47570473] [2020-10-27 01:42:30,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:30,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:30,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:30,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:30,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:30,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:30,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:30,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:30,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:30,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:42:30,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:42:30,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 306 [2020-10-27 01:42:30,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:30,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:42:30,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:30,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:42:30,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:30,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:30,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:30,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:30,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:30,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:30,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:30,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:42:30,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:30,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:30,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:30,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:30,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:30,954 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:30,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [47570473] [2020-10-27 01:42:30,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:30,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:42:30,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624607945] [2020-10-27 01:42:30,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:42:30,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:30,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:42:30,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:42:30,956 INFO L87 Difference]: Start difference. First operand 1991 states and 3402 transitions. Second operand 12 states. [2020-10-27 01:42:32,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:32,397 INFO L93 Difference]: Finished difference Result 2066 states and 3508 transitions. [2020-10-27 01:42:32,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:42:32,398 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-10-27 01:42:32,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:32,402 INFO L225 Difference]: With dead ends: 2066 [2020-10-27 01:42:32,402 INFO L226 Difference]: Without dead ends: 2062 [2020-10-27 01:42:32,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:42:32,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2062 states. [2020-10-27 01:42:32,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2062 to 2015. [2020-10-27 01:42:32,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2015 states. [2020-10-27 01:42:32,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2015 states to 2015 states and 3443 transitions. [2020-10-27 01:42:32,601 INFO L78 Accepts]: Start accepts. Automaton has 2015 states and 3443 transitions. Word has length 33 [2020-10-27 01:42:32,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:32,602 INFO L481 AbstractCegarLoop]: Abstraction has 2015 states and 3443 transitions. [2020-10-27 01:42:32,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:42:32,602 INFO L276 IsEmpty]: Start isEmpty. Operand 2015 states and 3443 transitions. [2020-10-27 01:42:32,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:42:32,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:32,603 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:32,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2020-10-27 01:42:32,603 INFO L429 AbstractCegarLoop]: === Iteration 140 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:32,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:32,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1843357695, now seen corresponding path program 45 times [2020-10-27 01:42:32,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:32,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806273350] [2020-10-27 01:42:32,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:32,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:32,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:32,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:32,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:32,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:32,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:32,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:32,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:32,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:42:32,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:42:32,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 325 [2020-10-27 01:42:32,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:32,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:42:32,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:32,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:42:32,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:33,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:33,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:33,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:33,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:33,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:33,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:33,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:42:33,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:33,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:33,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:33,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:33,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:33,100 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:33,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806273350] [2020-10-27 01:42:33,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:33,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:42:33,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413283175] [2020-10-27 01:42:33,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:42:33,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:33,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:42:33,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:42:33,102 INFO L87 Difference]: Start difference. First operand 2015 states and 3443 transitions. Second operand 12 states. [2020-10-27 01:42:34,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:34,576 INFO L93 Difference]: Finished difference Result 2081 states and 3533 transitions. [2020-10-27 01:42:34,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:42:34,577 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-10-27 01:42:34,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:34,580 INFO L225 Difference]: With dead ends: 2081 [2020-10-27 01:42:34,580 INFO L226 Difference]: Without dead ends: 2077 [2020-10-27 01:42:34,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:42:34,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2077 states. [2020-10-27 01:42:34,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2077 to 2032. [2020-10-27 01:42:34,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2032 states. [2020-10-27 01:42:34,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2032 states to 2032 states and 3472 transitions. [2020-10-27 01:42:34,783 INFO L78 Accepts]: Start accepts. Automaton has 2032 states and 3472 transitions. Word has length 33 [2020-10-27 01:42:34,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:34,783 INFO L481 AbstractCegarLoop]: Abstraction has 2032 states and 3472 transitions. [2020-10-27 01:42:34,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:42:34,783 INFO L276 IsEmpty]: Start isEmpty. Operand 2032 states and 3472 transitions. [2020-10-27 01:42:34,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:42:34,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:34,785 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:34,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2020-10-27 01:42:34,785 INFO L429 AbstractCegarLoop]: === Iteration 141 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:34,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:34,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1434509777, now seen corresponding path program 28 times [2020-10-27 01:42:34,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:34,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1782101938] [2020-10-27 01:42:34,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:34,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:34,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:34,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:34,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:34,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:34,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:34,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:35,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:35,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:42:35,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:42:35,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 294 [2020-10-27 01:42:35,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:35,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:42:35,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:35,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:42:35,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:35,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:35,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:35,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:35,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:35,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:35,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:35,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:42:35,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:35,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:35,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:35,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:35,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:35,254 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:35,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1782101938] [2020-10-27 01:42:35,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:35,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:42:35,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605285253] [2020-10-27 01:42:35,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:42:35,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:35,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:42:35,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:42:35,255 INFO L87 Difference]: Start difference. First operand 2032 states and 3472 transitions. Second operand 12 states. [2020-10-27 01:42:36,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:36,734 INFO L93 Difference]: Finished difference Result 2109 states and 3581 transitions. [2020-10-27 01:42:36,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:42:36,735 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-10-27 01:42:36,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:36,738 INFO L225 Difference]: With dead ends: 2109 [2020-10-27 01:42:36,739 INFO L226 Difference]: Without dead ends: 2105 [2020-10-27 01:42:36,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:42:36,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2105 states. [2020-10-27 01:42:36,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2105 to 2058. [2020-10-27 01:42:36,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2058 states. [2020-10-27 01:42:36,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2058 states to 2058 states and 3516 transitions. [2020-10-27 01:42:36,959 INFO L78 Accepts]: Start accepts. Automaton has 2058 states and 3516 transitions. Word has length 33 [2020-10-27 01:42:36,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:36,959 INFO L481 AbstractCegarLoop]: Abstraction has 2058 states and 3516 transitions. [2020-10-27 01:42:36,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:42:36,959 INFO L276 IsEmpty]: Start isEmpty. Operand 2058 states and 3516 transitions. [2020-10-27 01:42:36,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:42:36,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:36,961 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:36,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2020-10-27 01:42:36,961 INFO L429 AbstractCegarLoop]: === Iteration 142 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:36,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:36,961 INFO L82 PathProgramCache]: Analyzing trace with hash -2021315791, now seen corresponding path program 46 times [2020-10-27 01:42:36,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:36,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1060663535] [2020-10-27 01:42:36,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:36,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:36,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:36,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:37,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:37,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:37,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:37,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:37,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:37,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:42:37,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:42:37,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 302 [2020-10-27 01:42:37,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:37,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:42:37,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:37,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:42:37,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:37,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:37,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:37,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:37,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:37,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:37,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:37,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:42:37,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:37,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:37,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:37,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:37,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:37,435 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:37,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1060663535] [2020-10-27 01:42:37,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:37,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:42:37,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364760267] [2020-10-27 01:42:37,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:42:37,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:37,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:42:37,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:42:37,436 INFO L87 Difference]: Start difference. First operand 2058 states and 3516 transitions. Second operand 12 states. [2020-10-27 01:42:38,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:38,886 INFO L93 Difference]: Finished difference Result 2134 states and 3623 transitions. [2020-10-27 01:42:38,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:42:38,887 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-10-27 01:42:38,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:38,890 INFO L225 Difference]: With dead ends: 2134 [2020-10-27 01:42:38,891 INFO L226 Difference]: Without dead ends: 2130 [2020-10-27 01:42:38,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:42:38,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2130 states. [2020-10-27 01:42:39,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2130 to 2084. [2020-10-27 01:42:39,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2084 states. [2020-10-27 01:42:39,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2084 states to 2084 states and 3560 transitions. [2020-10-27 01:42:39,099 INFO L78 Accepts]: Start accepts. Automaton has 2084 states and 3560 transitions. Word has length 33 [2020-10-27 01:42:39,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:39,099 INFO L481 AbstractCegarLoop]: Abstraction has 2084 states and 3560 transitions. [2020-10-27 01:42:39,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:42:39,099 INFO L276 IsEmpty]: Start isEmpty. Operand 2084 states and 3560 transitions. [2020-10-27 01:42:39,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:42:39,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:39,101 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:39,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2020-10-27 01:42:39,101 INFO L429 AbstractCegarLoop]: === Iteration 143 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:39,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:39,101 INFO L82 PathProgramCache]: Analyzing trace with hash 648036803, now seen corresponding path program 47 times [2020-10-27 01:42:39,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:39,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [619575182] [2020-10-27 01:42:39,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:39,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:39,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:39,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:39,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:39,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:39,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:39,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:39,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:39,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:42:39,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:42:39,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 316 [2020-10-27 01:42:39,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:39,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:42:39,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:39,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:42:39,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:39,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:39,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:39,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:39,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:39,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:39,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:39,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:42:39,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:39,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:39,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:39,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:39,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:39,589 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:39,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [619575182] [2020-10-27 01:42:39,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:39,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:42:39,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239808418] [2020-10-27 01:42:39,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:42:39,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:39,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:42:39,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:42:39,591 INFO L87 Difference]: Start difference. First operand 2084 states and 3560 transitions. Second operand 12 states. [2020-10-27 01:42:41,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:41,083 INFO L93 Difference]: Finished difference Result 2151 states and 3652 transitions. [2020-10-27 01:42:41,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:42:41,084 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-10-27 01:42:41,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:41,088 INFO L225 Difference]: With dead ends: 2151 [2020-10-27 01:42:41,088 INFO L226 Difference]: Without dead ends: 2147 [2020-10-27 01:42:41,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:42:41,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2147 states. [2020-10-27 01:42:41,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2147 to 2102. [2020-10-27 01:42:41,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2102 states. [2020-10-27 01:42:41,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2102 states to 2102 states and 3591 transitions. [2020-10-27 01:42:41,308 INFO L78 Accepts]: Start accepts. Automaton has 2102 states and 3591 transitions. Word has length 33 [2020-10-27 01:42:41,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:41,309 INFO L481 AbstractCegarLoop]: Abstraction has 2102 states and 3591 transitions. [2020-10-27 01:42:41,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:42:41,309 INFO L276 IsEmpty]: Start isEmpty. Operand 2102 states and 3591 transitions. [2020-10-27 01:42:41,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:42:41,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:41,310 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:41,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2020-10-27 01:42:41,310 INFO L429 AbstractCegarLoop]: === Iteration 144 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:41,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:41,311 INFO L82 PathProgramCache]: Analyzing trace with hash 255009793, now seen corresponding path program 27 times [2020-10-27 01:42:41,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:41,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [770995196] [2020-10-27 01:42:41,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:41,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:41,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:41,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:41,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:41,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:41,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:41,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:41,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:41,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:42:41,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:42:41,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 300 [2020-10-27 01:42:41,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:41,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:42:41,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:41,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:42:41,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:41,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:41,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:41,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:41,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:41,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:41,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:41,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:42:41,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:41,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:41,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:41,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:41,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:41,780 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:41,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [770995196] [2020-10-27 01:42:41,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:41,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:42:41,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669964007] [2020-10-27 01:42:41,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:42:41,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:41,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:42:41,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:42:41,782 INFO L87 Difference]: Start difference. First operand 2102 states and 3591 transitions. Second operand 12 states. [2020-10-27 01:42:43,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:43,268 INFO L93 Difference]: Finished difference Result 2176 states and 3695 transitions. [2020-10-27 01:42:43,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:42:43,269 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-10-27 01:42:43,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:43,273 INFO L225 Difference]: With dead ends: 2176 [2020-10-27 01:42:43,273 INFO L226 Difference]: Without dead ends: 2172 [2020-10-27 01:42:43,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:42:43,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2020-10-27 01:42:43,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 2125. [2020-10-27 01:42:43,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2125 states. [2020-10-27 01:42:43,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2125 states to 2125 states and 3630 transitions. [2020-10-27 01:42:43,484 INFO L78 Accepts]: Start accepts. Automaton has 2125 states and 3630 transitions. Word has length 33 [2020-10-27 01:42:43,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:43,484 INFO L481 AbstractCegarLoop]: Abstraction has 2125 states and 3630 transitions. [2020-10-27 01:42:43,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:42:43,484 INFO L276 IsEmpty]: Start isEmpty. Operand 2125 states and 3630 transitions. [2020-10-27 01:42:43,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:42:43,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:43,485 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:43,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2020-10-27 01:42:43,486 INFO L429 AbstractCegarLoop]: === Iteration 145 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:43,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:43,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1272109617, now seen corresponding path program 48 times [2020-10-27 01:42:43,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:43,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1348285929] [2020-10-27 01:42:43,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:43,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:43,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:43,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:43,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:43,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:43,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:43,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:43,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:43,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:42:43,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:42:43,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 324 [2020-10-27 01:42:43,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:43,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:42:43,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:43,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:42:43,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:43,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:43,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:43,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:43,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:43,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:43,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:43,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:42:43,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:43,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:43,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:43,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:43,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:43,987 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:43,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1348285929] [2020-10-27 01:42:43,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:43,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:42:43,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745959812] [2020-10-27 01:42:43,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:42:43,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:43,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:42:43,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:42:43,989 INFO L87 Difference]: Start difference. First operand 2125 states and 3630 transitions. Second operand 12 states. [2020-10-27 01:42:45,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:45,504 INFO L93 Difference]: Finished difference Result 2201 states and 3737 transitions. [2020-10-27 01:42:45,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:42:45,505 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-10-27 01:42:45,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:45,508 INFO L225 Difference]: With dead ends: 2201 [2020-10-27 01:42:45,509 INFO L226 Difference]: Without dead ends: 2197 [2020-10-27 01:42:45,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:42:45,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2197 states. [2020-10-27 01:42:45,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2197 to 2151. [2020-10-27 01:42:45,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2151 states. [2020-10-27 01:42:45,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2151 states to 2151 states and 3674 transitions. [2020-10-27 01:42:45,726 INFO L78 Accepts]: Start accepts. Automaton has 2151 states and 3674 transitions. Word has length 33 [2020-10-27 01:42:45,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:45,726 INFO L481 AbstractCegarLoop]: Abstraction has 2151 states and 3674 transitions. [2020-10-27 01:42:45,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:42:45,726 INFO L276 IsEmpty]: Start isEmpty. Operand 2151 states and 3674 transitions. [2020-10-27 01:42:45,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:42:45,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:45,727 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:45,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2020-10-27 01:42:45,728 INFO L429 AbstractCegarLoop]: === Iteration 146 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:45,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:45,728 INFO L82 PathProgramCache]: Analyzing trace with hash 685303603, now seen corresponding path program 28 times [2020-10-27 01:42:45,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:45,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2084048111] [2020-10-27 01:42:45,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:45,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:45,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:45,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:45,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:45,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:45,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:45,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:46,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:46,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:42:46,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:42:46,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 305 [2020-10-27 01:42:46,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:46,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:42:46,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:46,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:42:46,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0