/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/loops-crafted-1/vnew1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:54:36,554 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:54:36,558 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:54:36,614 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:54:36,615 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:54:36,621 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:54:36,624 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:54:36,628 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:54:36,632 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:54:36,638 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:54:36,639 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:54:36,641 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:54:36,641 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:54:36,644 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:54:36,646 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:54:36,648 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:54:36,649 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:54:36,653 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:54:36,661 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:54:36,670 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:54:36,673 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:54:36,675 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:54:36,677 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:54:36,679 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:54:36,688 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:54:36,688 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:54:36,689 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:54:36,691 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:54:36,692 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:54:36,693 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:54:36,693 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:54:36,694 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:54:36,696 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:54:36,697 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:54:36,698 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:54:36,699 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:54:36,699 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:54:36,700 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:54:36,700 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:54:36,701 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:54:36,702 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:54:36,709 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 01:54:36,772 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:54:36,772 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:54:36,776 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:54:36,777 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:54:36,777 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:54:36,777 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:54:36,777 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:54:36,778 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:54:36,778 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:54:36,778 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:54:36,779 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:54:36,779 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:54:36,780 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:54:36,780 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:54:36,780 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:54:36,780 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:54:36,780 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:54:36,781 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:54:36,781 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:54:36,781 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:54:36,781 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:54:36,781 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:54:36,782 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:54:36,782 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:54:36,782 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:54:36,782 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:54:36,782 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:54:36,782 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:54:36,783 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:54:36,783 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:54:37,198 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:54:37,227 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:54:37,230 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:54:37,233 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:54:37,234 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:54:37,235 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/vnew1.c [2020-10-27 01:54:37,331 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3cab1b9f8/01eef9f6fa404b569b2737806ab4cd33/FLAGcfc869a58 [2020-10-27 01:54:38,059 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:54:38,060 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/vnew1.c [2020-10-27 01:54:38,068 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3cab1b9f8/01eef9f6fa404b569b2737806ab4cd33/FLAGcfc869a58 [2020-10-27 01:54:38,438 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3cab1b9f8/01eef9f6fa404b569b2737806ab4cd33 [2020-10-27 01:54:38,444 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:54:38,453 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:54:38,458 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:54:38,459 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:54:38,463 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:54:38,464 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:54:38" (1/1) ... [2020-10-27 01:54:38,469 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5505058b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:54:38, skipping insertion in model container [2020-10-27 01:54:38,469 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:54:38" (1/1) ... [2020-10-27 01:54:38,478 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:54:38,495 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:54:38,715 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:54:38,726 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:54:38,744 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:54:38,761 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:54:38,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:54:38 WrapperNode [2020-10-27 01:54:38,762 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:54:38,763 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:54:38,763 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:54:38,764 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:54:38,777 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:54:38" (1/1) ... [2020-10-27 01:54:38,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:54:38" (1/1) ... [2020-10-27 01:54:38,785 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:54:38" (1/1) ... [2020-10-27 01:54:38,786 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:54:38" (1/1) ... [2020-10-27 01:54:38,792 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:54:38" (1/1) ... [2020-10-27 01:54:38,796 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:54:38" (1/1) ... [2020-10-27 01:54:38,798 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:54:38" (1/1) ... [2020-10-27 01:54:38,800 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:54:38,801 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:54:38,801 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:54:38,802 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:54:38,803 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:54:38" (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 01:54:38,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:54:38,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:54:38,874 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:54:38,874 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 01:54:38,874 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 01:54:38,874 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:54:38,875 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:54:38,875 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:54:38,875 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:54:38,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:54:38,875 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 01:54:38,875 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 01:54:38,876 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-27 01:54:38,876 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:54:38,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:54:38,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:54:38,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:54:38,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:54:38,878 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:54:38,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:54:39,120 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:54:39,120 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-27 01:54:39,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:54:39 BoogieIcfgContainer [2020-10-27 01:54:39,122 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:54:39,124 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:54:39,124 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:54:39,127 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:54:39,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:54:38" (1/3) ... [2020-10-27 01:54:39,129 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40de5dc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:54:39, skipping insertion in model container [2020-10-27 01:54:39,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:54:38" (2/3) ... [2020-10-27 01:54:39,129 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40de5dc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:54:39, skipping insertion in model container [2020-10-27 01:54:39,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:54:39" (3/3) ... [2020-10-27 01:54:39,131 INFO L111 eAbstractionObserver]: Analyzing ICFG vnew1.c [2020-10-27 01:54:39,145 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:54:39,150 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:54:39,163 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:54:39,191 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:54:39,191 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:54:39,192 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:54:39,192 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:54:39,192 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:54:39,192 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:54:39,192 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:54:39,192 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:54:39,210 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-10-27 01:54:39,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 01:54:39,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:54:39,217 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:54:39,217 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:54:39,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:54:39,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1893499074, now seen corresponding path program 1 times [2020-10-27 01:54:39,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:54:39,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1787634242] [2020-10-27 01:54:39,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:54:39,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:54:39,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:39,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:40,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:54:40,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 01:54:40,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:54:40,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 850 [2020-10-27 01:54:40,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:54:40,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:54:40,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:54:40,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 01:54:40,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:54:40,561 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 10 [2020-10-27 01:54:40,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:54:40,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:54:40,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:40,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:54:40,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:54:40,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:54:40,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 01:54:40,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:54:40,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:54:40,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:54:40,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:54:40,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:54:40,684 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 01:54:40,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1787634242] [2020-10-27 01:54:40,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:54:40,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 01:54:40,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307393394] [2020-10-27 01:54:40,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:54:40,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:54:40,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:54:40,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:54:40,712 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 7 states. [2020-10-27 01:54:41,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:54:41,166 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2020-10-27 01:54:41,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:54:41,168 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-10-27 01:54:41,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:54:41,176 INFO L225 Difference]: With dead ends: 55 [2020-10-27 01:54:41,176 INFO L226 Difference]: Without dead ends: 28 [2020-10-27 01:54:41,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:54:41,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-27 01:54:41,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-10-27 01:54:41,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-27 01:54:41,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-27 01:54:41,229 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 15 [2020-10-27 01:54:41,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:54:41,229 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-27 01:54:41,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:54:41,230 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-27 01:54:41,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 01:54:41,231 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:54:41,231 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:54:41,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:54:41,232 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:54:41,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:54:41,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1602387218, now seen corresponding path program 1 times [2020-10-27 01:54:41,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:54:41,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1356411734] [2020-10-27 01:54:41,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:54:41,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:54:41,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:41,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:54:41,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 01:54:41,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:54:41,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 232 [2020-10-27 01:54:41,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:54:41,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:54:41,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:54:41,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:54:41,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:54:41,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:54:41,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:54:41,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:41,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:54:41,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:54:41,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:54:41,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 01:54:41,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:54:41,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:54:41,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:54:41,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:54:41,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:54:41,814 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 01:54:41,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1356411734] [2020-10-27 01:54:41,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:54:41,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:54:41,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73200648] [2020-10-27 01:54:41,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:54:41,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:54:41,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:54:41,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:54:41,826 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 8 states. [2020-10-27 01:54:42,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:54:42,309 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2020-10-27 01:54:42,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:54:42,310 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-10-27 01:54:42,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:54:42,311 INFO L225 Difference]: With dead ends: 40 [2020-10-27 01:54:42,312 INFO L226 Difference]: Without dead ends: 37 [2020-10-27 01:54:42,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:54:42,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-27 01:54:42,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-10-27 01:54:42,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-27 01:54:42,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-10-27 01:54:42,325 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 16 [2020-10-27 01:54:42,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:54:42,326 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-10-27 01:54:42,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:54:42,326 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-10-27 01:54:42,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 01:54:42,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:54:42,327 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:54:42,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:54:42,328 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:54:42,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:54:42,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1167854274, now seen corresponding path program 2 times [2020-10-27 01:54:42,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:54:42,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398514973] [2020-10-27 01:54:42,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:54:42,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:54:42,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:42,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:54:42,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 01:54:42,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:54:42,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 226 [2020-10-27 01:54:42,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:54:42,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:54:42,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:54:42,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:54:42,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:54:42,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:54:42,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:54:42,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:42,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:54:42,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:54:42,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:54:42,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:54:42,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:54:42,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:54:42,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:54:42,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:54:42,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:54:42,747 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:54:42,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398514973] [2020-10-27 01:54:42,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:54:42,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:54:42,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154293400] [2020-10-27 01:54:42,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:54:42,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:54:42,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:54:42,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:54:42,753 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 8 states. [2020-10-27 01:54:43,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:54:43,230 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2020-10-27 01:54:43,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:54:43,231 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-10-27 01:54:43,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:54:43,235 INFO L225 Difference]: With dead ends: 55 [2020-10-27 01:54:43,235 INFO L226 Difference]: Without dead ends: 52 [2020-10-27 01:54:43,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:54:43,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-27 01:54:43,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 37. [2020-10-27 01:54:43,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 01:54:43,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-10-27 01:54:43,249 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 17 [2020-10-27 01:54:43,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:54:43,249 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-10-27 01:54:43,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:54:43,249 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-10-27 01:54:43,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 01:54:43,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:54:43,250 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:54:43,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:54:43,251 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:54:43,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:54:43,252 INFO L82 PathProgramCache]: Analyzing trace with hash 582234898, now seen corresponding path program 3 times [2020-10-27 01:54:43,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:54:43,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1535266576] [2020-10-27 01:54:43,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:54:43,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:54:43,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:43,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:54:43,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 01:54:43,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:54:43,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 228 [2020-10-27 01:54:43,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:54:43,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:54:43,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:54:43,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:54:43,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:54:43,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:54:43,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:54:43,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:43,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:54:43,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:54:43,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:54:43,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:54:43,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:54:43,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:54:43,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:54:43,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:54:43,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:54:43,663 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 01:54:43,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1535266576] [2020-10-27 01:54:43,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:54:43,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:54:43,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238399757] [2020-10-27 01:54:43,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:54:43,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:54:43,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:54:43,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:54:43,666 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 9 states. [2020-10-27 01:54:46,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:54:46,406 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2020-10-27 01:54:46,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:54:46,410 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-10-27 01:54:46,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:54:46,413 INFO L225 Difference]: With dead ends: 60 [2020-10-27 01:54:46,414 INFO L226 Difference]: Without dead ends: 57 [2020-10-27 01:54:46,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:54:46,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-27 01:54:46,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 38. [2020-10-27 01:54:46,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-27 01:54:46,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-10-27 01:54:46,441 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 18 [2020-10-27 01:54:46,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:54:46,442 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-10-27 01:54:46,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:54:46,442 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-10-27 01:54:46,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 01:54:46,444 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:54:46,445 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:54:46,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:54:46,445 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:54:46,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:54:46,446 INFO L82 PathProgramCache]: Analyzing trace with hash -392096574, now seen corresponding path program 4 times [2020-10-27 01:54:46,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:54:46,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194974948] [2020-10-27 01:54:46,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:54:46,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:54:46,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:46,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:54:46,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 01:54:46,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:54:46,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 385 [2020-10-27 01:54:46,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:54:46,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:54:46,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:54:46,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 01:54:46,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:54:47,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:54:47,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:54:47,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:47,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:54:47,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:54:47,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:54:47,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:54:47,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:54:47,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:54:47,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:54:47,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:54:47,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:54:47,120 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:54:47,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1194974948] [2020-10-27 01:54:47,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:54:47,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:54:47,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898225965] [2020-10-27 01:54:47,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:54:47,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:54:47,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:54:47,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:54:47,122 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 10 states. [2020-10-27 01:54:48,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:54:48,028 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2020-10-27 01:54:48,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:54:48,029 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2020-10-27 01:54:48,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:54:48,031 INFO L225 Difference]: With dead ends: 61 [2020-10-27 01:54:48,032 INFO L226 Difference]: Without dead ends: 58 [2020-10-27 01:54:48,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:54:48,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-27 01:54:48,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 39. [2020-10-27 01:54:48,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 01:54:48,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2020-10-27 01:54:48,046 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 19 [2020-10-27 01:54:48,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:54:48,046 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2020-10-27 01:54:48,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:54:48,047 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2020-10-27 01:54:48,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 01:54:48,047 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:54:48,048 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:54:48,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:54:48,048 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:54:48,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:54:48,049 INFO L82 PathProgramCache]: Analyzing trace with hash -531601134, now seen corresponding path program 5 times [2020-10-27 01:54:48,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:54:48,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2113247812] [2020-10-27 01:54:48,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:54:48,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:54:48,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:48,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:54:48,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 01:54:48,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:54:48,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 379 [2020-10-27 01:54:48,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:54:48,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:54:48,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:54:48,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:54:48,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:54:48,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:54:48,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:54:48,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:48,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:54:48,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:54:48,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:54:48,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 01:54:48,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:54:48,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:54:48,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:54:48,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:54:48,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:54:48,720 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 01:54:48,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2113247812] [2020-10-27 01:54:48,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:54:48,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:54:48,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103627523] [2020-10-27 01:54:48,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:54:48,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:54:48,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:54:48,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:54:48,725 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 11 states. [2020-10-27 01:54:54,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:54:54,178 INFO L93 Difference]: Finished difference Result 77 states and 87 transitions. [2020-10-27 01:54:54,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:54:54,179 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-10-27 01:54:54,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:54:54,182 INFO L225 Difference]: With dead ends: 77 [2020-10-27 01:54:54,182 INFO L226 Difference]: Without dead ends: 74 [2020-10-27 01:54:54,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:54:54,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-27 01:54:54,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 40. [2020-10-27 01:54:54,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 01:54:54,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2020-10-27 01:54:54,208 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 20 [2020-10-27 01:54:54,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:54:54,208 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2020-10-27 01:54:54,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:54:54,209 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2020-10-27 01:54:54,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 01:54:54,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:54:54,210 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:54:54,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:54:54,210 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:54:54,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:54:54,211 INFO L82 PathProgramCache]: Analyzing trace with hash -561275198, now seen corresponding path program 6 times [2020-10-27 01:54:54,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:54:54,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [826455207] [2020-10-27 01:54:54,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:54:54,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:54:54,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:54,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:54:54,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:54:54,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:54:54,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 454 [2020-10-27 01:54:54,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:54:54,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:54:54,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:54:54,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 01:54:54,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:54:55,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:54:55,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:54:55,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:55,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:54:55,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:54:55,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:54:55,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:54:55,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:54:55,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:54:55,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:54:55,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:54:55,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:54:55,101 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:54:55,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [826455207] [2020-10-27 01:54:55,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:54:55,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:54:55,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484417534] [2020-10-27 01:54:55,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:54:55,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:54:55,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:54:55,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:54:55,105 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand 12 states. [2020-10-27 01:55:04,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:55:04,815 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2020-10-27 01:55:04,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:55:04,815 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2020-10-27 01:55:04,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:55:04,817 INFO L225 Difference]: With dead ends: 77 [2020-10-27 01:55:04,817 INFO L226 Difference]: Without dead ends: 74 [2020-10-27 01:55:04,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:55:04,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-27 01:55:04,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 62. [2020-10-27 01:55:04,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-27 01:55:04,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2020-10-27 01:55:04,843 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 21 [2020-10-27 01:55:04,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:55:04,843 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2020-10-27 01:55:04,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:55:04,844 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2020-10-27 01:55:04,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 01:55:04,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:55:04,846 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] [2020-10-27 01:55:04,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:55:04,846 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:55:04,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:55:04,847 INFO L82 PathProgramCache]: Analyzing trace with hash -54620541, now seen corresponding path program 1 times [2020-10-27 01:55:04,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:55:04,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1677148196] [2020-10-27 01:55:04,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:55:04,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:55:04,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:04,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:05,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:05,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:05,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:55:05,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:55:05,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:55:05,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 807 [2020-10-27 01:55:05,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:55:05,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:55:05,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:55:05,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:55:05,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:55:05,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:55:05,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:55:05,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:05,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:55:05,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:55:05,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:55:05,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:55:05,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:55:05,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:55:05,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:55:05,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:55:05,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:55:05,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-27 01:55:05,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:55:05,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:05,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:55:05,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:55:05,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:55:05,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:55:05,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:55:05,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:55:05,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:55:05,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:55:05,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:55:05,920 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 01:55:05,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1677148196] [2020-10-27 01:55:05,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:55:05,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:55:05,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431068268] [2020-10-27 01:55:05,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:55:05,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:55:05,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:55:05,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:55:05,923 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand 9 states. [2020-10-27 01:55:06,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:55:06,613 INFO L93 Difference]: Finished difference Result 84 states and 95 transitions. [2020-10-27 01:55:06,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:55:06,614 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-10-27 01:55:06,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:55:06,615 INFO L225 Difference]: With dead ends: 84 [2020-10-27 01:55:06,615 INFO L226 Difference]: Without dead ends: 81 [2020-10-27 01:55:06,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:55:06,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-27 01:55:06,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 73. [2020-10-27 01:55:06,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-27 01:55:06,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 84 transitions. [2020-10-27 01:55:06,646 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 84 transitions. Word has length 23 [2020-10-27 01:55:06,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:55:06,646 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 84 transitions. [2020-10-27 01:55:06,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:55:06,647 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 84 transitions. [2020-10-27 01:55:06,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 01:55:06,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:55:06,648 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:55:06,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:55:06,648 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:55:06,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:55:06,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1481171182, now seen corresponding path program 7 times [2020-10-27 01:55:06,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:55:06,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2109763383] [2020-10-27 01:55:06,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:55:06,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:55:06,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:07,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:55:07,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 01:55:07,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:55:07,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 383 [2020-10-27 01:55:07,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:55:07,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:55:07,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:55:07,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:55:07,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:55:07,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:55:07,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:55:07,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:07,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:55:07,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:55:07,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:55:07,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:55:07,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:55:07,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:55:07,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:55:07,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:55:07,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:55:07,356 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 01:55:07,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2109763383] [2020-10-27 01:55:07,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:55:07,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:55:07,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414565724] [2020-10-27 01:55:07,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:55:07,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:55:07,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:55:07,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:55:07,364 INFO L87 Difference]: Start difference. First operand 73 states and 84 transitions. Second operand 13 states. [2020-10-27 01:55:14,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:55:14,937 INFO L93 Difference]: Finished difference Result 96 states and 111 transitions. [2020-10-27 01:55:14,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:55:14,938 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2020-10-27 01:55:14,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:55:14,939 INFO L225 Difference]: With dead ends: 96 [2020-10-27 01:55:14,939 INFO L226 Difference]: Without dead ends: 93 [2020-10-27 01:55:14,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:55:14,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-27 01:55:14,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2020-10-27 01:55:14,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-27 01:55:14,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 86 transitions. [2020-10-27 01:55:14,986 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 86 transitions. Word has length 22 [2020-10-27 01:55:14,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:55:14,987 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 86 transitions. [2020-10-27 01:55:14,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:55:14,987 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 86 transitions. [2020-10-27 01:55:14,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 01:55:14,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:55:14,995 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:55:14,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:55:14,995 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:55:14,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:55:14,996 INFO L82 PathProgramCache]: Analyzing trace with hash 66824386, now seen corresponding path program 8 times [2020-10-27 01:55:14,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:55:14,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1071088153] [2020-10-27 01:55:14,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:55:15,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:55:15,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:15,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:55:15,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 01:55:15,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:55:15,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 510 [2020-10-27 01:55:15,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:55:15,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:55:15,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:55:15,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:55:15,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:55:15,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:55:15,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:55:15,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:15,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:55:15,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:55:15,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:55:15,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:55:15,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:55:15,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:55:15,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:55:15,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:55:15,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:55:15,988 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 01:55:15,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1071088153] [2020-10-27 01:55:15,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:55:15,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:55:15,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095847753] [2020-10-27 01:55:15,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:55:15,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:55:15,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:55:15,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:55:15,991 INFO L87 Difference]: Start difference. First operand 74 states and 86 transitions. Second operand 14 states. [2020-10-27 01:55:26,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:55:26,094 INFO L93 Difference]: Finished difference Result 101 states and 118 transitions. [2020-10-27 01:55:26,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:55:26,095 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 23 [2020-10-27 01:55:26,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:55:26,097 INFO L225 Difference]: With dead ends: 101 [2020-10-27 01:55:26,097 INFO L226 Difference]: Without dead ends: 98 [2020-10-27 01:55:26,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:55:26,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-27 01:55:26,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 75. [2020-10-27 01:55:26,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-27 01:55:26,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 88 transitions. [2020-10-27 01:55:26,122 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 88 transitions. Word has length 23 [2020-10-27 01:55:26,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:55:26,122 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 88 transitions. [2020-10-27 01:55:26,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:55:26,123 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 88 transitions. [2020-10-27 01:55:26,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 01:55:26,123 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:55:26,124 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:55:26,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:55:26,124 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:55:26,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:55:26,124 INFO L82 PathProgramCache]: Analyzing trace with hash -2041309053, now seen corresponding path program 2 times [2020-10-27 01:55:26,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:55:26,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446144468] [2020-10-27 01:55:26,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:55:26,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:55:26,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:26,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:55:26,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:55:26,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:55:26,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 301 [2020-10-27 01:55:26,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:55:26,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:55:26,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:55:26,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:55:26,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:55:26,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:55:26,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:55:26,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:26,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:55:26,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:55:26,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:55:26,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:55:26,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:55:26,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:55:26,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:55:26,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:55:26,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:55:26,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-27 01:55:26,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:55:26,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:26,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:55:26,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:55:26,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:55:26,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:55:26,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:55:26,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:55:26,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:55:26,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:55:26,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:55:26,686 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 01:55:26,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [446144468] [2020-10-27 01:55:26,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:55:26,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:55:26,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598284223] [2020-10-27 01:55:26,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:55:26,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:55:26,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:55:26,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:55:26,689 INFO L87 Difference]: Start difference. First operand 75 states and 88 transitions. Second operand 10 states. [2020-10-27 01:55:27,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:55:27,560 INFO L93 Difference]: Finished difference Result 105 states and 117 transitions. [2020-10-27 01:55:27,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:55:27,561 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-10-27 01:55:27,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:55:27,564 INFO L225 Difference]: With dead ends: 105 [2020-10-27 01:55:27,565 INFO L226 Difference]: Without dead ends: 102 [2020-10-27 01:55:27,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:55:27,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-27 01:55:27,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 76. [2020-10-27 01:55:27,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-27 01:55:27,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2020-10-27 01:55:27,605 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 25 [2020-10-27 01:55:27,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:55:27,605 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2020-10-27 01:55:27,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:55:27,605 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2020-10-27 01:55:27,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 01:55:27,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:55:27,607 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:55:27,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:55:27,608 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:55:27,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:55:27,608 INFO L82 PathProgramCache]: Analyzing trace with hash 810046738, now seen corresponding path program 9 times [2020-10-27 01:55:27,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:55:27,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [844722022] [2020-10-27 01:55:27,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:55:27,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:55:27,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:28,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:55:28,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:55:28,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:55:28,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 606 [2020-10-27 01:55:28,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:55:28,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:55:28,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:55:28,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:55:28,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:55:28,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:55:28,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:55:28,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:28,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:55:28,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:55:28,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:55:28,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:55:28,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:55:28,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:55:28,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:55:28,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:55:28,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:55:28,656 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:55:28,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [844722022] [2020-10-27 01:55:28,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:55:28,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:55:28,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773172362] [2020-10-27 01:55:28,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:55:28,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:55:28,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:55:28,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:55:28,658 INFO L87 Difference]: Start difference. First operand 76 states and 87 transitions. Second operand 15 states. [2020-10-27 01:55:34,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:55:34,554 INFO L93 Difference]: Finished difference Result 110 states and 128 transitions. [2020-10-27 01:55:34,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:55:34,555 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 24 [2020-10-27 01:55:34,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:55:34,561 INFO L225 Difference]: With dead ends: 110 [2020-10-27 01:55:34,562 INFO L226 Difference]: Without dead ends: 107 [2020-10-27 01:55:34,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:55:34,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-27 01:55:34,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 77. [2020-10-27 01:55:34,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-27 01:55:34,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2020-10-27 01:55:34,596 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 24 [2020-10-27 01:55:34,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:55:34,596 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2020-10-27 01:55:34,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:55:34,596 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2020-10-27 01:55:34,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 01:55:34,601 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:55:34,601 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:55:34,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:55:34,602 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:55:34,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:55:34,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1919864126, now seen corresponding path program 10 times [2020-10-27 01:55:34,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:55:34,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485185122] [2020-10-27 01:55:34,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:55:34,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:55:34,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:35,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:55:35,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:55:35,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:55:35,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 574 [2020-10-27 01:55:35,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:55:35,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:55:35,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:55:35,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:55:35,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:55:35,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:55:35,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:55:35,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:35,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:55:35,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:55:35,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:55:35,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:55:35,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:55:35,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:55:35,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:55:35,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:55:35,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:55:35,921 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:55:35,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1485185122] [2020-10-27 01:55:35,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:55:35,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:55:35,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423613112] [2020-10-27 01:55:35,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:55:35,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:55:35,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:55:35,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:55:35,924 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand 16 states. [2020-10-27 01:55:47,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:55:47,236 INFO L93 Difference]: Finished difference Result 127 states and 147 transitions. [2020-10-27 01:55:47,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:55:47,237 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-10-27 01:55:47,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:55:47,238 INFO L225 Difference]: With dead ends: 127 [2020-10-27 01:55:47,238 INFO L226 Difference]: Without dead ends: 124 [2020-10-27 01:55:47,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:55:47,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-27 01:55:47,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 91. [2020-10-27 01:55:47,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-27 01:55:47,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2020-10-27 01:55:47,273 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 25 [2020-10-27 01:55:47,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:55:47,273 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2020-10-27 01:55:47,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:55:47,273 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2020-10-27 01:55:47,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:55:47,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:55:47,274 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:55:47,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:55:47,275 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:55:47,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:55:47,275 INFO L82 PathProgramCache]: Analyzing trace with hash -647754990, now seen corresponding path program 11 times [2020-10-27 01:55:47,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:55:47,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1294275746] [2020-10-27 01:55:47,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:55:47,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:55:47,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:47,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:55:47,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:55:47,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:55:47,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 558 [2020-10-27 01:55:47,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:55:47,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:55:47,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:55:47,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:55:47,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:55:48,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:55:48,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:55:48,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:48,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:55:48,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:55:48,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:55:48,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:55:48,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:55:48,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:55:48,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:55:48,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:55:48,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:55:48,434 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:55:48,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1294275746] [2020-10-27 01:55:48,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:55:48,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:55:48,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452481968] [2020-10-27 01:55:48,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:55:48,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:55:48,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:55:48,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:55:48,437 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand 17 states. [2020-10-27 01:55:56,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:55:56,894 INFO L93 Difference]: Finished difference Result 124 states and 145 transitions. [2020-10-27 01:55:56,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:55:56,895 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 26 [2020-10-27 01:55:56,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:55:56,898 INFO L225 Difference]: With dead ends: 124 [2020-10-27 01:55:56,899 INFO L226 Difference]: Without dead ends: 121 [2020-10-27 01:55:56,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:55:56,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-27 01:55:56,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 92. [2020-10-27 01:55:56,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-27 01:55:56,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 108 transitions. [2020-10-27 01:55:56,940 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 108 transitions. Word has length 26 [2020-10-27 01:55:56,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:55:56,941 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 108 transitions. [2020-10-27 01:55:56,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:55:56,941 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 108 transitions. [2020-10-27 01:55:56,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:55:56,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:55:56,942 INFO L422 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:55:56,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:55:56,942 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:55:56,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:55:56,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1557322029, now seen corresponding path program 3 times [2020-10-27 01:55:56,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:55:56,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395203062] [2020-10-27 01:55:56,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:55:56,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:55:56,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:57,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:55:57,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:55:57,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:55:57,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 408 [2020-10-27 01:55:57,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:55:57,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:55:57,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:55:57,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:55:57,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:55:57,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:55:57,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:55:57,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:57,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:55:57,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:55:57,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:55:57,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:55:57,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:55:57,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:55:57,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:55:57,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:55:57,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:55:57,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-27 01:55:57,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:55:57,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:55:57,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:55:57,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:55:57,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:55:57,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:55:57,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:55:57,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:55:57,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:55:57,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:55:57,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:55:57,705 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:55:57,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395203062] [2020-10-27 01:55:57,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:55:57,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:55:57,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726525053] [2020-10-27 01:55:57,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:55:57,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:55:57,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:55:57,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:55:57,708 INFO L87 Difference]: Start difference. First operand 92 states and 108 transitions. Second operand 13 states. [2020-10-27 01:56:05,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:56:05,223 INFO L93 Difference]: Finished difference Result 133 states and 151 transitions. [2020-10-27 01:56:05,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:56:05,225 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2020-10-27 01:56:05,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:56:05,227 INFO L225 Difference]: With dead ends: 133 [2020-10-27 01:56:05,228 INFO L226 Difference]: Without dead ends: 130 [2020-10-27 01:56:05,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:56:05,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-27 01:56:05,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 73. [2020-10-27 01:56:05,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-27 01:56:05,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2020-10-27 01:56:05,259 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 28 [2020-10-27 01:56:05,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:56:05,259 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2020-10-27 01:56:05,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:56:05,259 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2020-10-27 01:56:05,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:56:05,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:56:05,260 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:56:05,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:56:05,261 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:56:05,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:56:05,261 INFO L82 PathProgramCache]: Analyzing trace with hash 132922562, now seen corresponding path program 12 times [2020-10-27 01:56:05,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:56:05,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1728031557] [2020-10-27 01:56:05,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:56:05,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:05,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:06,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:06,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:56:06,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:56:06,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 695 [2020-10-27 01:56:06,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:06,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:56:06,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:56:06,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:56:06,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:08,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:56:08,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:08,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:08,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:08,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:56:08,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:56:08,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:56:08,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:08,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:56:08,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:56:08,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:56:08,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:08,907 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 77 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:56:08,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1728031557] [2020-10-27 01:56:08,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:56:08,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:56:08,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191823779] [2020-10-27 01:56:08,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:56:08,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:56:08,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:56:08,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=272, Unknown=1, NotChecked=0, Total=306 [2020-10-27 01:56:08,909 INFO L87 Difference]: Start difference. First operand 73 states and 87 transitions. Second operand 18 states. [2020-10-27 01:56:33,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:56:33,253 INFO L93 Difference]: Finished difference Result 134 states and 164 transitions. [2020-10-27 01:56:33,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:56:33,254 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 27 [2020-10-27 01:56:33,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:56:33,256 INFO L225 Difference]: With dead ends: 134 [2020-10-27 01:56:33,256 INFO L226 Difference]: Without dead ends: 131 [2020-10-27 01:56:33,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=100, Invalid=1021, Unknown=1, NotChecked=0, Total=1122 [2020-10-27 01:56:33,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-27 01:56:33,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 74. [2020-10-27 01:56:33,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-27 01:56:33,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 89 transitions. [2020-10-27 01:56:33,287 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 89 transitions. Word has length 27 [2020-10-27 01:56:33,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:56:33,287 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 89 transitions. [2020-10-27 01:56:33,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:56:33,288 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 89 transitions. [2020-10-27 01:56:33,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:56:33,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:56:33,288 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] [2020-10-27 01:56:33,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 01:56:33,289 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:56:33,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:56:33,290 INFO L82 PathProgramCache]: Analyzing trace with hash 308423666, now seen corresponding path program 4 times [2020-10-27 01:56:33,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:56:33,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493605108] [2020-10-27 01:56:33,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:56:33,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:33,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:33,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:33,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:33,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:33,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:34,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:34,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:34,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:34,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:34,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:34,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:34,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 01:56:34,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 01:56:34,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1554 [2020-10-27 01:56:34,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:34,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:56:34,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:56:34,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:56:34,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:35,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:56:35,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:35,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:35,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:35,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:56:35,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:56:35,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:56:35,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:35,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:56:35,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:56:35,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:56:35,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:35,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-27 01:56:35,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:35,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:35,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:35,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:56:35,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:56:35,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:56:35,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:35,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:56:35,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:56:35,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:56:35,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:35,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-27 01:56:35,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:35,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:35,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:35,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:56:35,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:56:35,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:56:35,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:35,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:56:35,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:56:35,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:56:35,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:35,212 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 01:56:35,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493605108] [2020-10-27 01:56:35,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:56:35,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:56:35,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159991853] [2020-10-27 01:56:35,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:56:35,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:56:35,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:56:35,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:56:35,215 INFO L87 Difference]: Start difference. First operand 74 states and 89 transitions. Second operand 9 states. [2020-10-27 01:56:35,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:56:35,849 INFO L93 Difference]: Finished difference Result 106 states and 123 transitions. [2020-10-27 01:56:35,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:56:35,850 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-10-27 01:56:35,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:56:35,851 INFO L225 Difference]: With dead ends: 106 [2020-10-27 01:56:35,852 INFO L226 Difference]: Without dead ends: 74 [2020-10-27 01:56:35,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:56:35,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-27 01:56:35,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-10-27 01:56:35,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-27 01:56:35,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 87 transitions. [2020-10-27 01:56:35,882 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 87 transitions. Word has length 30 [2020-10-27 01:56:35,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:56:35,883 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 87 transitions. [2020-10-27 01:56:35,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:56:35,883 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 87 transitions. [2020-10-27 01:56:35,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:56:35,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:56:35,883 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:56:35,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 01:56:35,884 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:56:35,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:56:35,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1435877102, now seen corresponding path program 13 times [2020-10-27 01:56:35,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:56:35,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [66702117] [2020-10-27 01:56:35,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:56:35,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:35,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:36,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:36,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:56:36,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:56:36,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 873 [2020-10-27 01:56:36,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:36,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 01:56:36,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:56:36,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 01:56:36,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 01:56:37,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:56:37,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:37,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:37,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:37,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:56:37,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:56:37,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:56:37,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:37,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:56:37,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:56:37,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:56:37,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:37,404 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:56:37,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [66702117] [2020-10-27 01:56:37,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:56:37,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 01:56:37,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345225824] [2020-10-27 01:56:37,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 01:56:37,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:56:37,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 01:56:37,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:56:37,406 INFO L87 Difference]: Start difference. First operand 74 states and 87 transitions. Second operand 19 states. [2020-10-27 01:56:48,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:56:48,518 INFO L93 Difference]: Finished difference Result 118 states and 141 transitions. [2020-10-27 01:56:48,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:56:48,519 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 28 [2020-10-27 01:56:48,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:56:48,520 INFO L225 Difference]: With dead ends: 118 [2020-10-27 01:56:48,521 INFO L226 Difference]: Without dead ends: 115 [2020-10-27 01:56:48,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=106, Invalid=1154, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 01:56:48,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-27 01:56:48,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 75. [2020-10-27 01:56:48,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-27 01:56:48,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 89 transitions. [2020-10-27 01:56:48,546 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 89 transitions. Word has length 28 [2020-10-27 01:56:48,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:56:48,546 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 89 transitions. [2020-10-27 01:56:48,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 01:56:48,547 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 89 transitions. [2020-10-27 01:56:48,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:56:48,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:56:48,547 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:56:48,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 01:56:48,548 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:56:48,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:56:48,548 INFO L82 PathProgramCache]: Analyzing trace with hash 2031748514, now seen corresponding path program 5 times [2020-10-27 01:56:48,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:56:48,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504176553] [2020-10-27 01:56:48,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:56:48,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:48,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:48,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:48,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:49,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:49,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:49,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:49,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:50,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:50,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:56:50,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:56:50,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1589 [2020-10-27 01:56:50,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:50,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:56:50,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:56:50,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:56:50,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:50,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:56:50,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:50,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:50,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:50,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:56:50,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:56:50,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:56:50,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:50,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:56:50,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:56:50,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:56:50,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:50,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-27 01:56:50,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:50,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:50,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:50,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:56:50,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:56:50,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:56:50,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:50,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:56:50,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:56:50,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:56:50,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:50,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-27 01:56:50,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:50,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:50,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:50,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:56:50,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:56:50,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:56:50,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:50,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:56:50,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:56:50,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:56:50,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:50,541 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 01:56:50,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504176553] [2020-10-27 01:56:50,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:56:50,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:56:50,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96765315] [2020-10-27 01:56:50,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:56:50,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:56:50,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:56:50,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:56:50,544 INFO L87 Difference]: Start difference. First operand 75 states and 89 transitions. Second operand 12 states. [2020-10-27 01:56:51,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:56:51,463 INFO L93 Difference]: Finished difference Result 92 states and 108 transitions. [2020-10-27 01:56:51,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:56:51,464 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-10-27 01:56:51,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:56:51,465 INFO L225 Difference]: With dead ends: 92 [2020-10-27 01:56:51,466 INFO L226 Difference]: Without dead ends: 89 [2020-10-27 01:56:51,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:56:51,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-27 01:56:51,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-10-27 01:56:51,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-27 01:56:51,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 104 transitions. [2020-10-27 01:56:51,497 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 104 transitions. Word has length 31 [2020-10-27 01:56:51,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:56:51,498 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 104 transitions. [2020-10-27 01:56:51,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:56:51,498 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 104 transitions. [2020-10-27 01:56:51,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:56:51,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:56:51,499 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:56:51,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 01:56:51,499 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:56:51,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:56:51,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1470940866, now seen corresponding path program 14 times [2020-10-27 01:56:51,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:56:51,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1891776097] [2020-10-27 01:56:51,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:56:51,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:51,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:52,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:52,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:56:52,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:56:52,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 804 [2020-10-27 01:56:52,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:52,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 01:56:52,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:56:52,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:56:52,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:53,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:56:53,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:53,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:53,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:53,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:56:53,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:56:53,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:56:53,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:53,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:56:53,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:56:53,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:56:53,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:53,106 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:56:53,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1891776097] [2020-10-27 01:56:53,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:56:53,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 01:56:53,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813203064] [2020-10-27 01:56:53,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 01:56:53,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:56:53,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 01:56:53,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:56:53,108 INFO L87 Difference]: Start difference. First operand 88 states and 104 transitions. Second operand 20 states. [2020-10-27 01:57:06,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:57:06,546 INFO L93 Difference]: Finished difference Result 138 states and 164 transitions. [2020-10-27 01:57:06,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:57:06,548 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 29 [2020-10-27 01:57:06,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:57:06,550 INFO L225 Difference]: With dead ends: 138 [2020-10-27 01:57:06,550 INFO L226 Difference]: Without dead ends: 135 [2020-10-27 01:57:06,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=120, Invalid=1286, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 01:57:06,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-27 01:57:06,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 101. [2020-10-27 01:57:06,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-27 01:57:06,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 120 transitions. [2020-10-27 01:57:06,595 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 120 transitions. Word has length 29 [2020-10-27 01:57:06,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:57:06,595 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 120 transitions. [2020-10-27 01:57:06,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 01:57:06,596 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 120 transitions. [2020-10-27 01:57:06,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:57:06,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:57:06,597 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:57:06,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 01:57:06,597 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:57:06,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:57:06,597 INFO L82 PathProgramCache]: Analyzing trace with hash -379756046, now seen corresponding path program 6 times [2020-10-27 01:57:06,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:57:06,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1700095191] [2020-10-27 01:57:06,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:57:06,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:06,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:06,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:06,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:57:06,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:57:06,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 323 [2020-10-27 01:57:06,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:06,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:57:06,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:57:06,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 01:57:06,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:57:07,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:57:07,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:07,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:07,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:07,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:57:07,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:57:07,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:57:07,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:07,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:57:07,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:57:07,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:57:07,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:57:07,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-27 01:57:07,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:07,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:07,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:07,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:57:07,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:57:07,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:57:07,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:07,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:57:07,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:57:07,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:57:07,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:57:07,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-27 01:57:07,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:07,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:07,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:07,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:57:07,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:57:07,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:57:07,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:07,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:57:07,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:57:07,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:57:07,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:57:07,186 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 01:57:07,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1700095191] [2020-10-27 01:57:07,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:57:07,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:57:07,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570615647] [2020-10-27 01:57:07,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:57:07,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:57:07,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:57:07,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:57:07,188 INFO L87 Difference]: Start difference. First operand 101 states and 120 transitions. Second operand 11 states. [2020-10-27 01:57:10,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:57:10,082 INFO L93 Difference]: Finished difference Result 141 states and 160 transitions. [2020-10-27 01:57:10,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:57:10,083 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-27 01:57:10,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:57:10,084 INFO L225 Difference]: With dead ends: 141 [2020-10-27 01:57:10,084 INFO L226 Difference]: Without dead ends: 138 [2020-10-27 01:57:10,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:57:10,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-27 01:57:10,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 129. [2020-10-27 01:57:10,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-27 01:57:10,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 148 transitions. [2020-10-27 01:57:10,142 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 148 transitions. Word has length 32 [2020-10-27 01:57:10,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:57:10,143 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 148 transitions. [2020-10-27 01:57:10,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:57:10,143 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 148 transitions. [2020-10-27 01:57:10,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:57:10,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:57:10,143 INFO L422 BasicCegarLoop]: trace histogram [9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:57:10,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 01:57:10,144 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:57:10,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:57:10,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1305102717, now seen corresponding path program 7 times [2020-10-27 01:57:10,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:57:10,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [849850818] [2020-10-27 01:57:10,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:57:10,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:10,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:10,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:10,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:57:10,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:57:10,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 580 [2020-10-27 01:57:10,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:10,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:57:10,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:57:10,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:57:10,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:57:11,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:57:11,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:11,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:11,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:11,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:57:11,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:57:11,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:57:11,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:11,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:57:11,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:57:11,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:57:11,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:57:11,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-27 01:57:11,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:11,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:11,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:11,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:57:11,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:57:11,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:57:11,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:11,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:57:11,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:57:11,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:57:11,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:57:11,190 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 2 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:57:11,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [849850818] [2020-10-27 01:57:11,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:57:11,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:57:11,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215203293] [2020-10-27 01:57:11,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:57:11,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:57:11,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:57:11,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:57:11,192 INFO L87 Difference]: Start difference. First operand 129 states and 148 transitions. Second operand 16 states. [2020-10-27 01:57:17,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:57:17,219 INFO L93 Difference]: Finished difference Result 157 states and 179 transitions. [2020-10-27 01:57:17,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:57:17,220 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2020-10-27 01:57:17,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:57:17,221 INFO L225 Difference]: With dead ends: 157 [2020-10-27 01:57:17,222 INFO L226 Difference]: Without dead ends: 154 [2020-10-27 01:57:17,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:57:17,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-27 01:57:17,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 131. [2020-10-27 01:57:17,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-27 01:57:17,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 150 transitions. [2020-10-27 01:57:17,272 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 150 transitions. Word has length 31 [2020-10-27 01:57:17,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:57:17,273 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 150 transitions. [2020-10-27 01:57:17,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:57:17,273 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 150 transitions. [2020-10-27 01:57:17,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:57:17,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:57:17,274 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:57:17,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 01:57:17,274 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:57:17,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:57:17,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1387984658, now seen corresponding path program 15 times [2020-10-27 01:57:17,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:57:17,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1832422812] [2020-10-27 01:57:17,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:57:17,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:17,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:18,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:18,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:57:18,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:57:18,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 755 [2020-10-27 01:57:18,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:18,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 01:57:18,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:57:18,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:57:18,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:57:18,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:57:18,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:18,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:18,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:18,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:57:18,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:57:18,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:57:18,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:18,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:57:18,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:57:18,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:57:18,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:57:18,809 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:57:18,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1832422812] [2020-10-27 01:57:18,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:57:18,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 01:57:18,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201571692] [2020-10-27 01:57:18,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 01:57:18,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:57:18,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 01:57:18,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:57:18,811 INFO L87 Difference]: Start difference. First operand 131 states and 150 transitions. Second operand 21 states. [2020-10-27 01:57:40,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:57:40,964 INFO L93 Difference]: Finished difference Result 180 states and 209 transitions. [2020-10-27 01:57:40,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:57:40,965 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 30 [2020-10-27 01:57:40,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:57:40,966 INFO L225 Difference]: With dead ends: 180 [2020-10-27 01:57:40,966 INFO L226 Difference]: Without dead ends: 177 [2020-10-27 01:57:40,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=116, Invalid=1366, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:57:40,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-27 01:57:41,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 133. [2020-10-27 01:57:41,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-27 01:57:41,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 153 transitions. [2020-10-27 01:57:41,044 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 153 transitions. Word has length 30 [2020-10-27 01:57:41,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:57:41,044 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 153 transitions. [2020-10-27 01:57:41,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 01:57:41,044 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 153 transitions. [2020-10-27 01:57:41,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:57:41,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:57:41,045 INFO L422 BasicCegarLoop]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:57:41,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 01:57:41,046 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:57:41,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:57:41,046 INFO L82 PathProgramCache]: Analyzing trace with hash 578360019, now seen corresponding path program 8 times [2020-10-27 01:57:41,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:57:41,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [725996001] [2020-10-27 01:57:41,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:57:41,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:41,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:41,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:41,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 01:57:41,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:57:41,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 482 [2020-10-27 01:57:41,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:41,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:57:41,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:57:41,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 01:57:41,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:57:42,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:57:42,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:42,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:42,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:42,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:57:42,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:57:42,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:57:42,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:42,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:57:42,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:57:42,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:57:42,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:57:42,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-27 01:57:42,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:42,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:42,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:42,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:57:42,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:57:42,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:57:42,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:42,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:57:42,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:57:42,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:57:42,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:57:42,097 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 2 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:57:42,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [725996001] [2020-10-27 01:57:42,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:57:42,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:57:42,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587600684] [2020-10-27 01:57:42,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:57:42,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:57:42,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:57:42,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:57:42,099 INFO L87 Difference]: Start difference. First operand 133 states and 153 transitions. Second operand 17 states. [2020-10-27 01:57:52,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:57:52,796 INFO L93 Difference]: Finished difference Result 191 states and 216 transitions. [2020-10-27 01:57:52,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:57:52,797 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2020-10-27 01:57:52,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:57:52,799 INFO L225 Difference]: With dead ends: 191 [2020-10-27 01:57:52,799 INFO L226 Difference]: Without dead ends: 188 [2020-10-27 01:57:52,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:57:52,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-27 01:57:52,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 180. [2020-10-27 01:57:52,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-27 01:57:52,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 205 transitions. [2020-10-27 01:57:52,898 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 205 transitions. Word has length 32 [2020-10-27 01:57:52,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:57:52,899 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 205 transitions. [2020-10-27 01:57:52,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:57:52,899 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 205 transitions. [2020-10-27 01:57:52,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:57:52,900 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:57:52,900 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:57:52,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 01:57:52,900 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:57:52,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:57:52,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1183657790, now seen corresponding path program 16 times [2020-10-27 01:57:52,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:57:52,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052213607] [2020-10-27 01:57:52,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:57:52,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:52,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:53,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:53,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:57:53,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:57:53,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 743 [2020-10-27 01:57:53,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:53,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 01:57:53,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:57:53,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:57:53,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:57:54,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:57:54,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:54,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:54,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:54,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:57:54,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:57:54,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:57:54,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:54,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:57:54,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:57:54,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:57:54,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:57:54,526 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:57:54,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052213607] [2020-10-27 01:57:54,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:57:54,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 01:57:54,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658800657] [2020-10-27 01:57:54,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 01:57:54,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:57:54,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 01:57:54,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:57:54,529 INFO L87 Difference]: Start difference. First operand 180 states and 205 transitions. Second operand 22 states. [2020-10-27 01:58:04,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:04,823 INFO L93 Difference]: Finished difference Result 207 states and 237 transitions. [2020-10-27 01:58:04,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:58:04,824 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 31 [2020-10-27 01:58:04,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:04,826 INFO L225 Difference]: With dead ends: 207 [2020-10-27 01:58:04,826 INFO L226 Difference]: Without dead ends: 204 [2020-10-27 01:58:04,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=124, Invalid=1598, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 01:58:04,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-27 01:58:04,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 181. [2020-10-27 01:58:04,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-27 01:58:04,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 207 transitions. [2020-10-27 01:58:04,939 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 207 transitions. Word has length 31 [2020-10-27 01:58:04,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:04,939 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 207 transitions. [2020-10-27 01:58:04,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 01:58:04,940 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 207 transitions. [2020-10-27 01:58:04,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:58:04,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:04,941 INFO L422 BasicCegarLoop]: trace histogram [11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:04,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 01:58:04,941 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:04,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:04,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1163837309, now seen corresponding path program 9 times [2020-10-27 01:58:04,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:04,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097483053] [2020-10-27 01:58:04,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:04,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:05,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:05,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:05,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:58:05,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:05,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 513 [2020-10-27 01:58:05,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:05,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:58:05,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:58:05,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:58:05,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:06,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:06,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:06,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:06,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:06,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:06,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:06,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:58:06,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:06,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:06,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:06,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:06,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:06,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-27 01:58:06,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:06,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:06,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:06,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:58:06,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:06,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:58:06,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:06,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:58:06,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:06,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:58:06,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:06,062 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 2 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:58:06,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097483053] [2020-10-27 01:58:06,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:58:06,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:58:06,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962506921] [2020-10-27 01:58:06,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:58:06,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:06,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:58:06,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:58:06,064 INFO L87 Difference]: Start difference. First operand 181 states and 207 transitions. Second operand 18 states. [2020-10-27 01:58:10,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:10,949 INFO L93 Difference]: Finished difference Result 203 states and 230 transitions. [2020-10-27 01:58:10,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:58:10,950 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 33 [2020-10-27 01:58:10,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:10,951 INFO L225 Difference]: With dead ends: 203 [2020-10-27 01:58:10,951 INFO L226 Difference]: Without dead ends: 200 [2020-10-27 01:58:10,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=103, Invalid=1019, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 01:58:10,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-27 01:58:11,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 181. [2020-10-27 01:58:11,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-27 01:58:11,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 207 transitions. [2020-10-27 01:58:11,033 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 207 transitions. Word has length 33 [2020-10-27 01:58:11,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:11,033 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 207 transitions. [2020-10-27 01:58:11,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:58:11,034 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 207 transitions. [2020-10-27 01:58:11,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:58:11,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:11,035 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:11,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 01:58:11,035 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:11,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:11,035 INFO L82 PathProgramCache]: Analyzing trace with hash 699804946, now seen corresponding path program 17 times [2020-10-27 01:58:11,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:11,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435014605] [2020-10-27 01:58:11,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:11,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:11,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:11,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:11,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:58:11,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:11,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 843 [2020-10-27 01:58:11,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:11,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 01:58:11,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:58:11,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:58:11,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:12,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:12,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:12,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:12,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:12,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:12,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:12,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:58:12,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:12,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:12,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:12,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:12,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:12,836 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:58:12,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [435014605] [2020-10-27 01:58:12,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:58:12,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 01:58:12,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063063149] [2020-10-27 01:58:12,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 01:58:12,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:12,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 01:58:12,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:58:12,838 INFO L87 Difference]: Start difference. First operand 181 states and 207 transitions. Second operand 23 states. [2020-10-27 01:58:19,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:19,397 INFO L93 Difference]: Finished difference Result 212 states and 244 transitions. [2020-10-27 01:58:19,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:58:19,398 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 32 [2020-10-27 01:58:19,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:19,401 INFO L225 Difference]: With dead ends: 212 [2020-10-27 01:58:19,401 INFO L226 Difference]: Without dead ends: 209 [2020-10-27 01:58:19,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=125, Invalid=1681, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:58:19,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-27 01:58:19,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 182. [2020-10-27 01:58:19,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-27 01:58:19,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 209 transitions. [2020-10-27 01:58:19,478 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 209 transitions. Word has length 32 [2020-10-27 01:58:19,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:19,478 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 209 transitions. [2020-10-27 01:58:19,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 01:58:19,479 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 209 transitions. [2020-10-27 01:58:19,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:58:19,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:19,480 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:19,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 01:58:19,480 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:19,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:19,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1042392382, now seen corresponding path program 18 times [2020-10-27 01:58:19,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:19,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081762728] [2020-10-27 01:58:19,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:19,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:19,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:20,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:20,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:58:20,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:20,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 898 [2020-10-27 01:58:20,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:20,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 01:58:20,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:58:20,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:58:20,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:21,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:21,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:21,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:21,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:21,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:21,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:21,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:58:21,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:21,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:21,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:21,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:21,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:21,436 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:58:21,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081762728] [2020-10-27 01:58:21,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:58:21,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 01:58:21,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116672185] [2020-10-27 01:58:21,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 01:58:21,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:21,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 01:58:21,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:58:21,438 INFO L87 Difference]: Start difference. First operand 182 states and 209 transitions. Second operand 24 states. [2020-10-27 01:58:28,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:28,442 INFO L93 Difference]: Finished difference Result 223 states and 257 transitions. [2020-10-27 01:58:28,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 01:58:28,443 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 33 [2020-10-27 01:58:28,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:28,444 INFO L225 Difference]: With dead ends: 223 [2020-10-27 01:58:28,445 INFO L226 Difference]: Without dead ends: 220 [2020-10-27 01:58:28,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=139, Invalid=1841, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 01:58:28,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-27 01:58:28,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 196. [2020-10-27 01:58:28,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-27 01:58:28,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 226 transitions. [2020-10-27 01:58:28,534 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 226 transitions. Word has length 33 [2020-10-27 01:58:28,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:28,534 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 226 transitions. [2020-10-27 01:58:28,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 01:58:28,534 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 226 transitions. [2020-10-27 01:58:28,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:58:28,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:28,535 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:28,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 01:58:28,535 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:28,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:28,536 INFO L82 PathProgramCache]: Analyzing trace with hash 784065298, now seen corresponding path program 19 times [2020-10-27 01:58:28,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:28,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [910259850] [2020-10-27 01:58:28,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:28,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:28,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:29,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:29,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 01:58:29,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:29,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 835 [2020-10-27 01:58:29,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:29,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 01:58:29,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:58:29,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 01:58:29,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:30,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:30,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:30,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:30,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:30,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:30,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:30,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:58:30,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:30,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:30,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:30,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:30,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:30,563 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:58:30,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [910259850] [2020-10-27 01:58:30,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:58:30,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 01:58:30,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282899511] [2020-10-27 01:58:30,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 01:58:30,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:30,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 01:58:30,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:58:30,565 INFO L87 Difference]: Start difference. First operand 196 states and 226 transitions. Second operand 25 states. [2020-10-27 01:58:40,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:40,411 INFO L93 Difference]: Finished difference Result 226 states and 261 transitions. [2020-10-27 01:58:40,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 01:58:40,412 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 34 [2020-10-27 01:58:40,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:40,414 INFO L225 Difference]: With dead ends: 226 [2020-10-27 01:58:40,414 INFO L226 Difference]: Without dead ends: 223 [2020-10-27 01:58:40,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=137, Invalid=2025, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 01:58:40,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-27 01:58:40,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 198. [2020-10-27 01:58:40,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-10-27 01:58:40,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 229 transitions. [2020-10-27 01:58:40,501 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 229 transitions. Word has length 34 [2020-10-27 01:58:40,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:40,502 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 229 transitions. [2020-10-27 01:58:40,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 01:58:40,502 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 229 transitions. [2020-10-27 01:58:40,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:58:40,503 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:40,503 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:40,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 01:58:40,503 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:40,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:40,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1237795827, now seen corresponding path program 10 times [2020-10-27 01:58:40,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:40,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44298775] [2020-10-27 01:58:40,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:40,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:40,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:40,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:40,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:40,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:40,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:41,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:41,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:41,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:41,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:41,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:42,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:42,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:42,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:42,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:43,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:43,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 01:58:43,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 01:58:43,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2861 [2020-10-27 01:58:43,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:43,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:58:43,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:58:43,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 01:58:43,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:44,237 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 37