/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label53.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 08:23:54,397 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 08:23:54,401 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 08:23:54,461 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 08:23:54,462 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 08:23:54,471 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 08:23:54,474 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 08:23:54,480 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 08:23:54,485 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 08:23:54,493 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 08:23:54,495 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 08:23:54,497 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 08:23:54,497 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 08:23:54,501 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 08:23:54,506 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 08:23:54,510 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 08:23:54,511 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 08:23:54,515 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 08:23:54,525 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 08:23:54,533 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 08:23:54,540 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 08:23:54,542 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 08:23:54,544 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 08:23:54,545 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 08:23:54,549 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 08:23:54,549 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 08:23:54,550 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 08:23:54,551 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 08:23:54,552 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 08:23:54,553 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 08:23:54,554 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 08:23:54,555 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 08:23:54,556 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 08:23:54,558 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 08:23:54,559 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 08:23:54,571 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 08:23:54,576 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 08:23:54,576 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 08:23:54,576 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 08:23:54,577 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 08:23:54,582 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 08:23:54,583 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 08:23:54,627 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 08:23:54,628 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 08:23:54,631 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 08:23:54,633 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 08:23:54,633 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 08:23:54,633 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 08:23:54,634 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 08:23:54,634 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 08:23:54,634 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 08:23:54,634 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 08:23:54,636 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 08:23:54,636 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 08:23:54,637 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 08:23:54,637 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 08:23:54,638 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 08:23:54,638 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 08:23:54,638 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 08:23:54,638 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 08:23:54,638 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 08:23:54,639 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 08:23:54,639 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 08:23:54,639 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 08:23:54,640 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 08:23:54,640 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 08:23:54,641 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 08:23:54,641 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 08:23:54,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 08:23:54,641 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 08:23:54,641 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 08:23:54,642 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 08:23:55,138 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 08:23:55,191 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 08:23:55,195 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 08:23:55,196 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 08:23:55,197 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 08:23:55,198 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label53.c [2020-10-29 08:23:55,288 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f532810aa/7fd4c11a14ce414a9a60934c756ae388/FLAG2d3b0cc38 [2020-10-29 08:23:56,403 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 08:23:56,404 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label53.c [2020-10-29 08:23:56,436 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f532810aa/7fd4c11a14ce414a9a60934c756ae388/FLAG2d3b0cc38 [2020-10-29 08:23:56,836 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f532810aa/7fd4c11a14ce414a9a60934c756ae388 [2020-10-29 08:23:56,839 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 08:23:56,846 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 08:23:56,848 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 08:23:56,848 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 08:23:56,854 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 08:23:56,855 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 08:23:56" (1/1) ... [2020-10-29 08:23:56,860 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33672ad4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:23:56, skipping insertion in model container [2020-10-29 08:23:56,860 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 08:23:56" (1/1) ... [2020-10-29 08:23:56,870 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 08:23:56,966 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 08:23:58,052 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 08:23:58,071 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 08:23:58,583 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 08:23:58,614 INFO L208 MainTranslator]: Completed translation [2020-10-29 08:23:58,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:23:58 WrapperNode [2020-10-29 08:23:58,616 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 08:23:58,617 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 08:23:58,617 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 08:23:58,618 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 08:23:58,633 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:23:58" (1/1) ... [2020-10-29 08:23:58,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:23:58" (1/1) ... [2020-10-29 08:23:58,733 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:23:58" (1/1) ... [2020-10-29 08:23:58,734 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:23:58" (1/1) ... [2020-10-29 08:23:58,889 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:23:58" (1/1) ... [2020-10-29 08:23:58,910 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:23:58" (1/1) ... [2020-10-29 08:23:58,943 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:23:58" (1/1) ... [2020-10-29 08:23:58,963 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 08:23:58,964 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 08:23:58,965 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 08:23:58,965 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 08:23:58,966 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:23:58" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 08:23:59,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 08:23:59,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 08:23:59,061 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 08:23:59,061 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-29 08:23:59,061 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-29 08:23:59,062 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 08:23:59,062 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-29 08:23:59,062 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-29 08:23:59,062 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 08:23:59,062 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 08:23:59,063 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 08:23:59,063 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 08:23:59,063 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 08:23:59,063 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-29 08:23:59,063 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 08:23:59,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 08:23:59,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 08:23:59,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 08:23:59,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 08:23:59,064 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 08:23:59,065 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 08:24:08,606 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 08:24:08,606 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-29 08:24:08,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 08:24:08 BoogieIcfgContainer [2020-10-29 08:24:08,611 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 08:24:08,615 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 08:24:08,615 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 08:24:08,620 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 08:24:08,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 08:23:56" (1/3) ... [2020-10-29 08:24:08,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1577c507 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 08:24:08, skipping insertion in model container [2020-10-29 08:24:08,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:23:58" (2/3) ... [2020-10-29 08:24:08,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1577c507 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 08:24:08, skipping insertion in model container [2020-10-29 08:24:08,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 08:24:08" (3/3) ... [2020-10-29 08:24:08,624 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label53.c [2020-10-29 08:24:08,640 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 08:24:08,648 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 08:24:08,663 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 08:24:08,705 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 08:24:08,705 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 08:24:08,705 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 08:24:08,706 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 08:24:08,706 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 08:24:08,706 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 08:24:08,706 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 08:24:08,706 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 08:24:08,746 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states. [2020-10-29 08:24:08,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-29 08:24:08,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:24:08,760 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:24:08,760 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:24:08,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:24:08,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1185737181, now seen corresponding path program 1 times [2020-10-29 08:24:08,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:24:08,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1795354983] [2020-10-29 08:24:08,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:24:08,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:24:09,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:24:09,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:24:09,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 08:24:09,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:24:09,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 595 [2020-10-29 08:24:09,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:24:09,575 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:24:09,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:24:09,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:24:09,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 08:24:09,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 08:24:09,787 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-29 08:24:09,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:24:09,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:24:09,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:24:09,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:24:09,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:24:09,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:24:09,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-29 08:24:09,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:24:09,881 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:24:09,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:24:09,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:24:09,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:24:09,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 08:24:09,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:24:09,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1795354983] [2020-10-29 08:24:09,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:24:09,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-29 08:24:09,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595571257] [2020-10-29 08:24:09,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 08:24:09,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:24:09,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 08:24:09,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 08:24:09,958 INFO L87 Difference]: Start difference. First operand 607 states. Second operand 4 states. [2020-10-29 08:24:23,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:24:23,283 INFO L93 Difference]: Finished difference Result 1694 states and 3092 transitions. [2020-10-29 08:24:23,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 08:24:23,286 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-29 08:24:23,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:24:23,313 INFO L225 Difference]: With dead ends: 1694 [2020-10-29 08:24:23,313 INFO L226 Difference]: Without dead ends: 1010 [2020-10-29 08:24:23,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 08:24:23,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2020-10-29 08:24:23,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 992. [2020-10-29 08:24:23,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 992 states. [2020-10-29 08:24:23,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1527 transitions. [2020-10-29 08:24:23,464 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1527 transitions. Word has length 21 [2020-10-29 08:24:23,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:24:23,465 INFO L481 AbstractCegarLoop]: Abstraction has 992 states and 1527 transitions. [2020-10-29 08:24:23,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 08:24:23,465 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1527 transitions. [2020-10-29 08:24:23,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-29 08:24:23,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:24:23,471 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:24:23,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 08:24:23,471 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:24:23,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:24:23,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1698623038, now seen corresponding path program 1 times [2020-10-29 08:24:23,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:24:23,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1366241178] [2020-10-29 08:24:23,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:24:23,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:24:23,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:24:24,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:24:25,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:24:25,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-29 08:24:25,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:24:25,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1486 [2020-10-29 08:24:25,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:24:25,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:24:25,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:24:25,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:24:25,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-29 08:24:25,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-29 08:24:25,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:24:25,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:24:25,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:24:25,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:24:25,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:24:25,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:24:25,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-29 08:24:25,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:24:25,190 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:24:25,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:24:25,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:24:25,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:24:25,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-29 08:24:25,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:24:25,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:24:25,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:24:25,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:24:25,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 08:24:25,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:24:25,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 204 [2020-10-29 08:24:25,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:24:25,463 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:24:25,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:24:25,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:24:25,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-29 08:24:25,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:24:25,607 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:24:25,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1366241178] [2020-10-29 08:24:25,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:24:25,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 08:24:25,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678929557] [2020-10-29 08:24:25,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:24:25,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:24:25,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:24:25,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:24:25,618 INFO L87 Difference]: Start difference. First operand 992 states and 1527 transitions. Second operand 7 states. [2020-10-29 08:24:25,762 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-29 08:24:41,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:24:41,755 INFO L93 Difference]: Finished difference Result 2448 states and 3891 transitions. [2020-10-29 08:24:41,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 08:24:41,761 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 92 [2020-10-29 08:24:41,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:24:41,772 INFO L225 Difference]: With dead ends: 2448 [2020-10-29 08:24:41,772 INFO L226 Difference]: Without dead ends: 1462 [2020-10-29 08:24:41,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-29 08:24:41,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2020-10-29 08:24:41,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 1433. [2020-10-29 08:24:41,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1433 states. [2020-10-29 08:24:41,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1433 states to 1433 states and 1859 transitions. [2020-10-29 08:24:41,853 INFO L78 Accepts]: Start accepts. Automaton has 1433 states and 1859 transitions. Word has length 92 [2020-10-29 08:24:41,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:24:41,854 INFO L481 AbstractCegarLoop]: Abstraction has 1433 states and 1859 transitions. [2020-10-29 08:24:41,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:24:41,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1433 states and 1859 transitions. [2020-10-29 08:24:41,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-29 08:24:41,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:24:41,858 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:24:41,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 08:24:41,858 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:24:41,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:24:41,859 INFO L82 PathProgramCache]: Analyzing trace with hash 562135223, now seen corresponding path program 1 times [2020-10-29 08:24:41,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:24:41,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1828670168] [2020-10-29 08:24:41,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:24:41,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:24:41,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:24:42,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:24:42,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-29 08:24:42,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:24:42,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 307 [2020-10-29 08:24:42,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:24:42,216 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:24:42,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:24:42,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 84 [2020-10-29 08:24:42,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 08:24:42,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:24:42,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:24:42,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:24:42,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:24:42,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:24:42,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:24:42,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:24:42,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 08:24:42,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:24:42,353 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:24:42,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:24:42,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:24:42,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:24:42,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:24:42,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:24:42,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:24:42,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:24:42,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:24:42,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 08:24:42,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:24:42,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-29 08:24:42,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:24:42,519 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:24:42,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:24:42,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:24:42,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-29 08:24:42,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:24:42,603 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:24:42,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1828670168] [2020-10-29 08:24:42,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:24:42,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 08:24:42,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957513620] [2020-10-29 08:24:42,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 08:24:42,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:24:42,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 08:24:42,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 08:24:42,606 INFO L87 Difference]: Start difference. First operand 1433 states and 1859 transitions. Second operand 5 states. [2020-10-29 08:25:00,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:25:00,797 INFO L93 Difference]: Finished difference Result 3334 states and 4575 transitions. [2020-10-29 08:25:00,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 08:25:00,799 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 95 [2020-10-29 08:25:00,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:25:00,813 INFO L225 Difference]: With dead ends: 3334 [2020-10-29 08:25:00,813 INFO L226 Difference]: Without dead ends: 1894 [2020-10-29 08:25:00,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-29 08:25:00,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2020-10-29 08:25:00,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 1884. [2020-10-29 08:25:00,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1884 states. [2020-10-29 08:25:00,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1884 states to 1884 states and 2302 transitions. [2020-10-29 08:25:00,893 INFO L78 Accepts]: Start accepts. Automaton has 1884 states and 2302 transitions. Word has length 95 [2020-10-29 08:25:00,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:25:00,893 INFO L481 AbstractCegarLoop]: Abstraction has 1884 states and 2302 transitions. [2020-10-29 08:25:00,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 08:25:00,894 INFO L276 IsEmpty]: Start isEmpty. Operand 1884 states and 2302 transitions. [2020-10-29 08:25:00,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-29 08:25:00,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:25:00,914 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:25:00,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 08:25:00,915 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:25:00,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:25:00,917 INFO L82 PathProgramCache]: Analyzing trace with hash 655827335, now seen corresponding path program 1 times [2020-10-29 08:25:00,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:25:00,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981284166] [2020-10-29 08:25:00,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:25:00,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:25:01,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:01,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:02,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:25:02,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 195 [2020-10-29 08:25:02,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:25:02,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1501 [2020-10-29 08:25:02,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:25:02,491 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:25:02,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:25:02,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-29 08:25:02,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-29 08:25:02,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:25:02,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:25:02,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:25:02,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:02,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:25:02,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:25:02,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:25:02,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 08:25:02,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:25:02,653 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:25:02,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:25:02,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:25:02,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:25:02,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:25:02,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:25:02,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:25:02,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:02,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:25:02,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:25:02,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:25:02,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-10-29 08:25:02,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:25:02,844 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:25:02,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:25:02,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:25:02,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-29 08:25:02,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:25:02,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-29 08:25:02,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:25:02,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:03,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:25:03,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-29 08:25:03,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:25:03,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 187 [2020-10-29 08:25:03,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:25:03,112 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:25:03,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:25:03,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:25:03,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-29 08:25:03,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:25:03,218 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 96 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 08:25:03,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981284166] [2020-10-29 08:25:03,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:25:03,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 08:25:03,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001767858] [2020-10-29 08:25:03,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:25:03,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:25:03,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:25:03,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:25:03,221 INFO L87 Difference]: Start difference. First operand 1884 states and 2302 transitions. Second operand 7 states. [2020-10-29 08:25:19,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:25:19,292 INFO L93 Difference]: Finished difference Result 4253 states and 5497 transitions. [2020-10-29 08:25:19,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 08:25:19,294 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 181 [2020-10-29 08:25:19,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:25:19,314 INFO L225 Difference]: With dead ends: 4253 [2020-10-29 08:25:19,315 INFO L226 Difference]: Without dead ends: 2808 [2020-10-29 08:25:19,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 08:25:19,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2808 states. [2020-10-29 08:25:19,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2808 to 2792. [2020-10-29 08:25:19,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2792 states. [2020-10-29 08:25:19,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2792 states to 2792 states and 3419 transitions. [2020-10-29 08:25:19,419 INFO L78 Accepts]: Start accepts. Automaton has 2792 states and 3419 transitions. Word has length 181 [2020-10-29 08:25:19,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:25:19,421 INFO L481 AbstractCegarLoop]: Abstraction has 2792 states and 3419 transitions. [2020-10-29 08:25:19,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:25:19,421 INFO L276 IsEmpty]: Start isEmpty. Operand 2792 states and 3419 transitions. [2020-10-29 08:25:19,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-10-29 08:25:19,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:25:19,425 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:25:19,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 08:25:19,426 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:25:19,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:25:19,427 INFO L82 PathProgramCache]: Analyzing trace with hash -424919445, now seen corresponding path program 1 times [2020-10-29 08:25:19,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:25:19,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2022333425] [2020-10-29 08:25:19,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:25:19,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:25:19,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:20,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:22,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:25:22,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 197 [2020-10-29 08:25:22,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:25:22,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2852 [2020-10-29 08:25:22,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:25:22,344 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:25:22,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 08:25:22,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:25:22,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 170 [2020-10-29 08:25:22,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:25:22,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:25:22,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:25:22,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:22,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:25:22,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:25:22,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:25:22,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 08:25:22,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:25:22,518 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:25:22,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:25:22,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:25:22,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:25:22,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:25:22,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:25:22,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:25:22,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:22,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:25:22,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:25:22,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:25:22,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 225 [2020-10-29 08:25:22,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:25:22,792 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:25:22,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 08:25:22,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:25:22,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-29 08:25:22,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:25:22,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-29 08:25:22,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:25:22,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:23,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:25:23,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 08:25:23,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:25:23,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 210 [2020-10-29 08:25:23,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:25:23,107 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:25:23,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:25:23,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:25:23,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-29 08:25:23,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:25:23,233 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 98 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 08:25:23,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2022333425] [2020-10-29 08:25:23,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:25:23,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 08:25:23,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182810692] [2020-10-29 08:25:23,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 08:25:23,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:25:23,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 08:25:23,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-29 08:25:23,236 INFO L87 Difference]: Start difference. First operand 2792 states and 3419 transitions. Second operand 10 states. [2020-10-29 08:25:50,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:25:50,477 INFO L93 Difference]: Finished difference Result 9912 states and 13154 transitions. [2020-10-29 08:25:50,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 08:25:50,479 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 183 [2020-10-29 08:25:50,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:25:50,524 INFO L225 Difference]: With dead ends: 9912 [2020-10-29 08:25:50,524 INFO L226 Difference]: Without dead ends: 7089 [2020-10-29 08:25:50,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2020-10-29 08:25:50,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7089 states. [2020-10-29 08:25:50,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7089 to 6968. [2020-10-29 08:25:50,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6968 states. [2020-10-29 08:25:50,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6968 states to 6968 states and 8605 transitions. [2020-10-29 08:25:50,803 INFO L78 Accepts]: Start accepts. Automaton has 6968 states and 8605 transitions. Word has length 183 [2020-10-29 08:25:50,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:25:50,804 INFO L481 AbstractCegarLoop]: Abstraction has 6968 states and 8605 transitions. [2020-10-29 08:25:50,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 08:25:50,804 INFO L276 IsEmpty]: Start isEmpty. Operand 6968 states and 8605 transitions. [2020-10-29 08:25:50,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-10-29 08:25:50,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:25:50,807 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:25:50,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 08:25:50,808 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:25:50,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:25:50,809 INFO L82 PathProgramCache]: Analyzing trace with hash -35785291, now seen corresponding path program 1 times [2020-10-29 08:25:50,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:25:50,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1952660571] [2020-10-29 08:25:50,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:25:50,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:25:50,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:51,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:52,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:25:52,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 208 [2020-10-29 08:25:52,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:25:52,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1157 [2020-10-29 08:25:52,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:25:52,030 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:25:52,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:25:52,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-29 08:25:52,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-29 08:25:52,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:25:52,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:25:52,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:25:52,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:52,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:25:52,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:25:52,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:25:52,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 08:25:52,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:25:52,200 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:25:52,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:25:52,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:25:52,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:25:52,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:25:52,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:25:52,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:25:52,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:52,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:25:52,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:25:52,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:25:52,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-29 08:25:52,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:25:52,368 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:25:52,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:25:52,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:25:52,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-29 08:25:52,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:25:52,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-29 08:25:52,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:25:52,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:52,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:52,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:25:52,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-29 08:25:52,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:25:52,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 282 [2020-10-29 08:25:52,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:25:52,712 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:25:52,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:25:52,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:25:52,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-29 08:25:52,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:25:52,777 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2020-10-29 08:25:52,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1952660571] [2020-10-29 08:25:52,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:25:52,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 08:25:52,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311018237] [2020-10-29 08:25:52,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 08:25:52,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:25:52,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 08:25:52,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 08:25:52,780 INFO L87 Difference]: Start difference. First operand 6968 states and 8605 transitions. Second operand 5 states. [2020-10-29 08:26:04,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:26:04,974 INFO L93 Difference]: Finished difference Result 13938 states and 17586 transitions. [2020-10-29 08:26:04,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 08:26:04,986 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 194 [2020-10-29 08:26:04,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:26:05,022 INFO L225 Difference]: With dead ends: 13938 [2020-10-29 08:26:05,022 INFO L226 Difference]: Without dead ends: 7409 [2020-10-29 08:26:05,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-29 08:26:05,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7409 states. [2020-10-29 08:26:05,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7409 to 7403. [2020-10-29 08:26:05,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7403 states. [2020-10-29 08:26:05,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7403 states to 7403 states and 9199 transitions. [2020-10-29 08:26:05,239 INFO L78 Accepts]: Start accepts. Automaton has 7403 states and 9199 transitions. Word has length 194 [2020-10-29 08:26:05,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:26:05,239 INFO L481 AbstractCegarLoop]: Abstraction has 7403 states and 9199 transitions. [2020-10-29 08:26:05,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 08:26:05,240 INFO L276 IsEmpty]: Start isEmpty. Operand 7403 states and 9199 transitions. [2020-10-29 08:26:05,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-10-29 08:26:05,244 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:26:05,244 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:26:05,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 08:26:05,245 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:26:05,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:26:05,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1189053968, now seen corresponding path program 1 times [2020-10-29 08:26:05,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:26:05,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [24808896] [2020-10-29 08:26:05,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:26:05,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:26:05,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:05,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:06,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:08,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:09,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:26:09,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 281 [2020-10-29 08:26:09,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 08:26:09,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3772 [2020-10-29 08:26:09,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:26:09,097 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:26:09,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 08:26:09,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:26:09,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 272 [2020-10-29 08:26:09,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:26:09,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:26:09,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:26:09,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:09,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:26:09,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:26:09,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:26:09,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 08:26:09,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:26:09,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:26:09,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:26:09,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:26:09,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:26:09,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:26:09,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:26:09,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:26:09,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:09,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:26:09,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:26:09,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:26:09,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 233 [2020-10-29 08:26:09,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:26:09,628 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:26:09,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 08:26:09,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:26:09,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-29 08:26:09,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:26:09,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-29 08:26:09,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:26:09,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:09,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:26:09,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-29 08:26:09,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:26:09,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 157 [2020-10-29 08:26:09,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:26:09,889 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:26:09,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:26:09,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:26:09,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-29 08:26:09,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:26:09,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-10-29 08:26:09,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:26:09,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:10,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:26:10,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 08:26:10,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:26:10,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-10-29 08:26:10,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:26:10,077 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:26:10,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:26:10,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:26:10,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-29 08:26:10,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:26:10,253 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 88 proven. 100 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-10-29 08:26:10,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [24808896] [2020-10-29 08:26:10,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:26:10,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 08:26:10,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177074076] [2020-10-29 08:26:10,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 08:26:10,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:26:10,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 08:26:10,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-29 08:26:10,257 INFO L87 Difference]: Start difference. First operand 7403 states and 9199 transitions. Second operand 9 states. [2020-10-29 08:26:34,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:26:34,088 INFO L93 Difference]: Finished difference Result 26921 states and 34799 transitions. [2020-10-29 08:26:34,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 08:26:34,090 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 265 [2020-10-29 08:26:34,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:26:34,189 INFO L225 Difference]: With dead ends: 26921 [2020-10-29 08:26:34,190 INFO L226 Difference]: Without dead ends: 19059 [2020-10-29 08:26:34,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-10-29 08:26:34,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19059 states. [2020-10-29 08:26:34,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19059 to 17148. [2020-10-29 08:26:34,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17148 states. [2020-10-29 08:26:34,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17148 states to 17148 states and 20768 transitions. [2020-10-29 08:26:34,853 INFO L78 Accepts]: Start accepts. Automaton has 17148 states and 20768 transitions. Word has length 265 [2020-10-29 08:26:34,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:26:34,853 INFO L481 AbstractCegarLoop]: Abstraction has 17148 states and 20768 transitions. [2020-10-29 08:26:34,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 08:26:34,854 INFO L276 IsEmpty]: Start isEmpty. Operand 17148 states and 20768 transitions. [2020-10-29 08:26:34,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2020-10-29 08:26:34,859 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:26:34,859 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:26:34,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 08:26:34,860 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:26:34,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:26:34,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1797253393, now seen corresponding path program 1 times [2020-10-29 08:26:34,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:26:34,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1221979351] [2020-10-29 08:26:34,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:26:34,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:26:35,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:35,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:35,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:36,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:39,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:26:39,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 304 [2020-10-29 08:26:39,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 08:26:39,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-29 08:26:39,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:26:39,963 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:26:39,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:26:39,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-29 08:26:39,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-29 08:26:39,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:26:40,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:26:40,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:26:40,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:40,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:26:40,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:26:40,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:26:40,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 08:26:40,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:26:40,129 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:26:40,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:26:40,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:26:40,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:26:40,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:26:40,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:26:40,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:26:40,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:40,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:26:40,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:26:40,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:26:40,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-10-29 08:26:40,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:26:40,286 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:26:40,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:26:40,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:26:40,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-29 08:26:40,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:26:40,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-29 08:26:40,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:26:40,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:40,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:26:40,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-29 08:26:40,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:26:40,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 234 [2020-10-29 08:26:40,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:26:40,581 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:26:40,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:26:40,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:26:40,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-29 08:26:40,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:26:40,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2020-10-29 08:26:40,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:26:40,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:40,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:26:40,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 08:26:40,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:26:40,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-29 08:26:40,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:26:40,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:26:40,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:26:40,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-29 08:26:40,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:26:40,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:26:41,121 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 127 proven. 70 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-10-29 08:26:41,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1221979351] [2020-10-29 08:26:41,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:26:41,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 08:26:41,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336997741] [2020-10-29 08:26:41,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:26:41,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:26:41,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:26:41,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:26:41,126 INFO L87 Difference]: Start difference. First operand 17148 states and 20768 transitions. Second operand 7 states. [2020-10-29 08:26:47,358 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-29 08:26:56,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:26:56,830 INFO L93 Difference]: Finished difference Result 37560 states and 45583 transitions. [2020-10-29 08:26:56,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 08:26:56,833 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 288 [2020-10-29 08:26:56,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:26:56,907 INFO L225 Difference]: With dead ends: 37560 [2020-10-29 08:26:56,907 INFO L226 Difference]: Without dead ends: 20851 [2020-10-29 08:26:56,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-29 08:26:56,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20851 states. [2020-10-29 08:26:57,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20851 to 20751. [2020-10-29 08:26:57,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20751 states. [2020-10-29 08:26:57,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20751 states to 20751 states and 24989 transitions. [2020-10-29 08:26:57,469 INFO L78 Accepts]: Start accepts. Automaton has 20751 states and 24989 transitions. Word has length 288 [2020-10-29 08:26:57,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:26:57,470 INFO L481 AbstractCegarLoop]: Abstraction has 20751 states and 24989 transitions. [2020-10-29 08:26:57,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:26:57,470 INFO L276 IsEmpty]: Start isEmpty. Operand 20751 states and 24989 transitions. [2020-10-29 08:26:57,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2020-10-29 08:26:57,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:26:57,477 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:26:57,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 08:26:57,477 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:26:57,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:26:57,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1674236081, now seen corresponding path program 1 times [2020-10-29 08:26:57,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:26:57,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [165305175] [2020-10-29 08:26:57,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:26:57,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:26:57,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:57,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:00,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:02,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:02,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 328 [2020-10-29 08:27:02,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 08:27:02,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5056 [2020-10-29 08:27:02,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:02,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:02,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 08:27:02,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:27:02,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 224 [2020-10-29 08:27:02,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:27:02,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:27:02,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:02,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:02,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:02,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:27:02,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:27:02,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 08:27:02,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:02,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:02,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:27:02,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:27:02,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:27:02,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:27:02,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:27:02,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:02,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:03,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:03,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:27:03,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:27:03,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 223 [2020-10-29 08:27:03,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:03,133 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:03,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 08:27:03,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:27:03,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-29 08:27:03,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:27:03,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-29 08:27:03,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:03,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:03,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:03,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-29 08:27:03,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:27:03,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 270 [2020-10-29 08:27:03,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:03,599 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:03,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:27:03,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:27:03,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-29 08:27:03,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:27:03,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2020-10-29 08:27:03,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:03,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:03,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:03,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 08:27:03,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:27:03,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-29 08:27:03,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:03,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:03,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:27:03,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-29 08:27:03,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:27:03,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:27:04,249 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 44 proven. 225 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-29 08:27:04,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [165305175] [2020-10-29 08:27:04,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:27:04,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 08:27:04,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556435819] [2020-10-29 08:27:04,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 08:27:04,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:27:04,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 08:27:04,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-29 08:27:04,262 INFO L87 Difference]: Start difference. First operand 20751 states and 24989 transitions. Second operand 10 states. [2020-10-29 08:27:04,621 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2020-10-29 08:27:05,568 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-29 08:27:11,791 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-29 08:27:12,683 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73 [2020-10-29 08:27:19,681 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2020-10-29 08:27:27,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:27:27,723 INFO L93 Difference]: Finished difference Result 41912 states and 51304 transitions. [2020-10-29 08:27:27,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 08:27:27,727 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 312 [2020-10-29 08:27:27,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:27:27,801 INFO L225 Difference]: With dead ends: 41912 [2020-10-29 08:27:27,801 INFO L226 Difference]: Without dead ends: 21600 [2020-10-29 08:27:27,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2020-10-29 08:27:27,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21600 states. [2020-10-29 08:27:28,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21600 to 21241. [2020-10-29 08:27:28,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21241 states. [2020-10-29 08:27:28,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21241 states to 21241 states and 25541 transitions. [2020-10-29 08:27:28,422 INFO L78 Accepts]: Start accepts. Automaton has 21241 states and 25541 transitions. Word has length 312 [2020-10-29 08:27:28,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:27:28,422 INFO L481 AbstractCegarLoop]: Abstraction has 21241 states and 25541 transitions. [2020-10-29 08:27:28,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 08:27:28,423 INFO L276 IsEmpty]: Start isEmpty. Operand 21241 states and 25541 transitions. [2020-10-29 08:27:28,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2020-10-29 08:27:28,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:27:28,431 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:27:28,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 08:27:28,432 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:27:28,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:27:28,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1234525450, now seen corresponding path program 1 times [2020-10-29 08:27:28,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:27:28,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461637489] [2020-10-29 08:27:28,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:27:28,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:28,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:28,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:29,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:33,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:33,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 385 [2020-10-29 08:27:33,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 08:27:33,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-29 08:27:33,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:33,559 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:33,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:27:33,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 289 [2020-10-29 08:27:33,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-29 08:27:33,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:27:33,772 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-29 08:27:33,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:27:33,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:33,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:33,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:33,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:27:33,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:27:33,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 08:27:33,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:33,788 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:33,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:27:33,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:27:33,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:27:33,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:27:33,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:27:33,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:33,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:33,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:33,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:27:33,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:27:33,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-29 08:27:33,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:33,855 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:33,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:27:33,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:27:33,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:27:33,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:27:33,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-29 08:27:33,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:33,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:33,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:33,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-29 08:27:33,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:27:33,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-29 08:27:33,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:33,923 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:33,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:27:33,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:27:33,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:27:33,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:27:33,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-10-29 08:27:33,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:33,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:34,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:34,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-29 08:27:34,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:27:34,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-29 08:27:34,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:34,098 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:34,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:27:34,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:27:34,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-29 08:27:34,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:27:34,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 283 [2020-10-29 08:27:34,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:34,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:34,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:34,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 08:27:34,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:27:34,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-10-29 08:27:34,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:34,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:34,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:27:34,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:27:34,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-29 08:27:34,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:27:34,478 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 266 proven. 2 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-10-29 08:27:34,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1461637489] [2020-10-29 08:27:34,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:27:34,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 08:27:34,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151740774] [2020-10-29 08:27:34,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:27:34,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:27:34,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:27:34,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:27:34,481 INFO L87 Difference]: Start difference. First operand 21241 states and 25541 transitions. Second operand 7 states. [2020-10-29 08:27:39,057 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 66