/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 00:07:08,469 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 00:07:08,472 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 00:07:08,515 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 00:07:08,516 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 00:07:08,517 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 00:07:08,519 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 00:07:08,521 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 00:07:08,524 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 00:07:08,525 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 00:07:08,526 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 00:07:08,528 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 00:07:08,528 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 00:07:08,530 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 00:07:08,531 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 00:07:08,532 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 00:07:08,534 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 00:07:08,535 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 00:07:08,537 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 00:07:08,539 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 00:07:08,541 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 00:07:08,542 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 00:07:08,544 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 00:07:08,545 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 00:07:08,548 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 00:07:08,549 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 00:07:08,549 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 00:07:08,551 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 00:07:08,551 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 00:07:08,552 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 00:07:08,553 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 00:07:08,554 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 00:07:08,555 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 00:07:08,556 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 00:07:08,557 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 00:07:08,557 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 00:07:08,558 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 00:07:08,559 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 00:07:08,559 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 00:07:08,560 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 00:07:08,561 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 00:07:08,562 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 [2020-10-28 00:07:08,606 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 00:07:08,606 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 00:07:08,608 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 00:07:08,608 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 00:07:08,608 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 00:07:08,609 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 00:07:08,609 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 00:07:08,609 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 00:07:08,609 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 00:07:08,610 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 00:07:08,610 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 00:07:08,610 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 00:07:08,610 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 00:07:08,610 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 00:07:08,611 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 00:07:08,611 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 00:07:08,611 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 00:07:08,611 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 00:07:08,612 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 00:07:08,612 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 00:07:08,612 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 00:07:08,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:07:08,612 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 00:07:08,613 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 00:07:08,613 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 00:07:08,613 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 00:07:08,613 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 00:07:08,613 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 00:07:08,614 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 00:07:08,614 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-28 00:07:08,977 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 00:07:09,023 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 00:07:09,027 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 00:07:09,029 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 00:07:09,029 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 00:07:09,030 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2020-10-28 00:07:09,103 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/97d697f14/1b90fee53fde447eb70c7520cbe20035/FLAG08cb1e216 [2020-10-28 00:07:10,049 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 00:07:10,050 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2020-10-28 00:07:10,082 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/97d697f14/1b90fee53fde447eb70c7520cbe20035/FLAG08cb1e216 [2020-10-28 00:07:10,573 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/97d697f14/1b90fee53fde447eb70c7520cbe20035 [2020-10-28 00:07:10,576 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 00:07:10,583 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 00:07:10,585 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 00:07:10,585 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 00:07:10,589 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 00:07:10,590 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:07:10" (1/1) ... [2020-10-28 00:07:10,594 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78c530e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:07:10, skipping insertion in model container [2020-10-28 00:07:10,594 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:07:10" (1/1) ... [2020-10-28 00:07:10,605 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 00:07:10,720 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 00:07:11,767 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:07:11,784 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 00:07:12,185 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:07:12,209 INFO L208 MainTranslator]: Completed translation [2020-10-28 00:07:12,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:07:12 WrapperNode [2020-10-28 00:07:12,210 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 00:07:12,211 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 00:07:12,211 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 00:07:12,211 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 00:07:12,225 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:07:12" (1/1) ... [2020-10-28 00:07:12,225 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:07:12" (1/1) ... [2020-10-28 00:07:12,293 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:07:12" (1/1) ... [2020-10-28 00:07:12,295 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:07:12" (1/1) ... [2020-10-28 00:07:12,395 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:07:12" (1/1) ... [2020-10-28 00:07:12,494 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:07:12" (1/1) ... [2020-10-28 00:07:12,513 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:07:12" (1/1) ... [2020-10-28 00:07:12,541 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 00:07:12,543 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 00:07:12,544 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 00:07:12,544 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 00:07:12,545 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:07:12" (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 [2020-10-28 00:07:12,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 00:07:12,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 00:07:12,636 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 00:07:12,637 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 00:07:12,637 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 00:07:12,638 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 00:07:12,638 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 00:07:12,639 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 00:07:12,639 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 00:07:12,639 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 00:07:12,640 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 00:07:12,640 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 00:07:12,640 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 00:07:12,640 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 00:07:12,640 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 00:07:12,641 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 00:07:12,642 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 00:07:12,642 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 00:07:12,642 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 00:07:12,642 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 00:07:12,642 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 00:07:12,642 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 00:07:12,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 00:07:12,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 00:07:12,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 00:07:12,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 00:07:12,643 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 00:07:12,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 00:07:16,336 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 00:07:16,337 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 00:07:16,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:07:16 BoogieIcfgContainer [2020-10-28 00:07:16,341 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 00:07:16,343 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 00:07:16,343 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 00:07:16,347 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 00:07:16,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:07:10" (1/3) ... [2020-10-28 00:07:16,348 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@580c3e47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:07:16, skipping insertion in model container [2020-10-28 00:07:16,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:07:12" (2/3) ... [2020-10-28 00:07:16,349 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@580c3e47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:07:16, skipping insertion in model container [2020-10-28 00:07:16,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:07:16" (3/3) ... [2020-10-28 00:07:16,351 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2020-10-28 00:07:16,363 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 00:07:16,370 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 00:07:16,384 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 00:07:16,420 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 00:07:16,420 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 00:07:16,420 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 00:07:16,420 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 00:07:16,420 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 00:07:16,420 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 00:07:16,421 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 00:07:16,421 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 00:07:16,460 INFO L276 IsEmpty]: Start isEmpty. Operand 1130 states. [2020-10-28 00:07:16,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 00:07:16,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:07:16,489 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:07:16,489 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:07:16,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:07:16,496 INFO L82 PathProgramCache]: Analyzing trace with hash -966739044, now seen corresponding path program 1 times [2020-10-28 00:07:16,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:07:16,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1974943958] [2020-10-28 00:07:16,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:07:16,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:17,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:17,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:17,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:18,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:19,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:20,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:22,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:22,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 00:07:22,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:07:22,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-28 00:07:22,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:22,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 00:07:22,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 00:07:22,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 00:07:22,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 00:07:23,105 WARN L193 SmtUtils]: Spent 844.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 00:07:23,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:07:23,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:23,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:23,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:23,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:07:23,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:07:23,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-28 00:07:23,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:23,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:07:23,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:07:23,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:07:23,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:23,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:07:23,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1974943958] [2020-10-28 00:07:23,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:07:23,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 00:07:23,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929749722] [2020-10-28 00:07:23,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 00:07:23,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:07:23,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 00:07:23,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 00:07:23,254 INFO L87 Difference]: Start difference. First operand 1130 states. Second operand 8 states. [2020-10-28 00:07:24,191 WARN L193 SmtUtils]: Spent 834.00 ms on a formula simplification that was a NOOP. DAG size: 347 [2020-10-28 00:07:32,824 WARN L193 SmtUtils]: Spent 921.00 ms on a formula simplification that was a NOOP. DAG size: 349 [2020-10-28 00:07:34,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:07:34,868 INFO L93 Difference]: Finished difference Result 1837 states and 3214 transitions. [2020-10-28 00:07:34,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 00:07:34,876 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2020-10-28 00:07:34,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:07:34,924 INFO L225 Difference]: With dead ends: 1837 [2020-10-28 00:07:34,924 INFO L226 Difference]: Without dead ends: 1312 [2020-10-28 00:07:34,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-10-28 00:07:34,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1312 states. [2020-10-28 00:07:35,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1312 to 1141. [2020-10-28 00:07:35,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1141 states. [2020-10-28 00:07:35,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 1504 transitions. [2020-10-28 00:07:35,102 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 1504 transitions. Word has length 56 [2020-10-28 00:07:35,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:07:35,103 INFO L481 AbstractCegarLoop]: Abstraction has 1141 states and 1504 transitions. [2020-10-28 00:07:35,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 00:07:35,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 1504 transitions. [2020-10-28 00:07:35,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 00:07:35,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:07:35,116 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:07:35,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 00:07:35,117 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:07:35,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:07:35,118 INFO L82 PathProgramCache]: Analyzing trace with hash -308374435, now seen corresponding path program 1 times [2020-10-28 00:07:35,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:07:35,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1538343710] [2020-10-28 00:07:35,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:07:35,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:35,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:35,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:35,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:35,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:36,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:36,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:37,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:38,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:39,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:40,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:40,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:40,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 00:07:40,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 00:07:40,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5056 [2020-10-28 00:07:40,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:40,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:07:40,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 00:07:40,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 00:07:40,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:41,163 WARN L193 SmtUtils]: Spent 811.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 00:07:41,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:07:41,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:41,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:41,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:41,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:07:41,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:07:41,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 00:07:41,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:41,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:07:41,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:07:41,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:07:41,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:41,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:07:41,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1538343710] [2020-10-28 00:07:41,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:07:41,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:07:41,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520420190] [2020-10-28 00:07:41,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:07:41,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:07:41,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:07:41,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:07:41,224 INFO L87 Difference]: Start difference. First operand 1141 states and 1504 transitions. Second operand 6 states. [2020-10-28 00:07:42,122 WARN L193 SmtUtils]: Spent 829.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2020-10-28 00:07:49,686 WARN L193 SmtUtils]: Spent 846.00 ms on a formula simplification that was a NOOP. DAG size: 342 [2020-10-28 00:07:50,588 WARN L193 SmtUtils]: Spent 776.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2020-10-28 00:07:51,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:07:51,447 INFO L93 Difference]: Finished difference Result 2146 states and 3016 transitions. [2020-10-28 00:07:51,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 00:07:51,450 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-10-28 00:07:51,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:07:51,462 INFO L225 Difference]: With dead ends: 2146 [2020-10-28 00:07:51,462 INFO L226 Difference]: Without dead ends: 2030 [2020-10-28 00:07:51,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 00:07:51,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2030 states. [2020-10-28 00:07:51,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2030 to 1526. [2020-10-28 00:07:51,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1526 states. [2020-10-28 00:07:51,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1526 states to 1526 states and 2041 transitions. [2020-10-28 00:07:51,567 INFO L78 Accepts]: Start accepts. Automaton has 1526 states and 2041 transitions. Word has length 56 [2020-10-28 00:07:51,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:07:51,567 INFO L481 AbstractCegarLoop]: Abstraction has 1526 states and 2041 transitions. [2020-10-28 00:07:51,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:07:51,568 INFO L276 IsEmpty]: Start isEmpty. Operand 1526 states and 2041 transitions. [2020-10-28 00:07:51,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 00:07:51,572 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:07:51,572 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:07:51,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 00:07:51,572 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:07:51,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:07:51,573 INFO L82 PathProgramCache]: Analyzing trace with hash 517956793, now seen corresponding path program 1 times [2020-10-28 00:07:51,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:07:51,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [989880826] [2020-10-28 00:07:51,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:07:51,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:51,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:51,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:51,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:52,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:52,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:53,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:53,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:53,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:54,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:56,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:56,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 00:07:56,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 00:07:56,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 00:07:56,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:56,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:07:56,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 00:07:56,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 00:07:56,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:57,576 WARN L193 SmtUtils]: Spent 850.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 00:07:57,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:07:57,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:57,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:57,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:57,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:07:57,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:07:57,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-28 00:07:57,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:57,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:07:57,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:07:57,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:07:57,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:57,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:07:57,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [989880826] [2020-10-28 00:07:57,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:07:57,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:07:57,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668607739] [2020-10-28 00:07:57,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:07:57,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:07:57,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:07:57,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:07:57,667 INFO L87 Difference]: Start difference. First operand 1526 states and 2041 transitions. Second operand 6 states. [2020-10-28 00:07:58,596 WARN L193 SmtUtils]: Spent 870.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2020-10-28 00:08:04,713 WARN L193 SmtUtils]: Spent 788.00 ms on a formula simplification that was a NOOP. DAG size: 342 [2020-10-28 00:08:07,837 WARN L193 SmtUtils]: Spent 887.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2020-10-28 00:08:08,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:08:08,202 INFO L93 Difference]: Finished difference Result 3898 states and 5551 transitions. [2020-10-28 00:08:08,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 00:08:08,203 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-10-28 00:08:08,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:08:08,221 INFO L225 Difference]: With dead ends: 3898 [2020-10-28 00:08:08,221 INFO L226 Difference]: Without dead ends: 3553 [2020-10-28 00:08:08,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:08:08,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3553 states. [2020-10-28 00:08:08,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3553 to 3009. [2020-10-28 00:08:08,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3009 states. [2020-10-28 00:08:08,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3009 states to 3009 states and 4167 transitions. [2020-10-28 00:08:08,383 INFO L78 Accepts]: Start accepts. Automaton has 3009 states and 4167 transitions. Word has length 56 [2020-10-28 00:08:08,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:08:08,384 INFO L481 AbstractCegarLoop]: Abstraction has 3009 states and 4167 transitions. [2020-10-28 00:08:08,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:08:08,384 INFO L276 IsEmpty]: Start isEmpty. Operand 3009 states and 4167 transitions. [2020-10-28 00:08:08,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 00:08:08,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:08:08,390 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:08:08,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 00:08:08,391 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:08:08,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:08:08,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1370995832, now seen corresponding path program 1 times [2020-10-28 00:08:08,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:08:08,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [555936121] [2020-10-28 00:08:08,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:08:08,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:08,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:08,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:08,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:09,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:09,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:10,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:10,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:11,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:11,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:12,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:13,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:13,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:13,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 00:08:13,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 00:08:13,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5067 [2020-10-28 00:08:13,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:13,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 00:08:13,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 00:08:13,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 00:08:13,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:14,533 WARN L193 SmtUtils]: Spent 754.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 00:08:14,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:08:14,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:14,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:14,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:14,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:08:14,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:08:14,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 00:08:14,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:14,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:08:14,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:08:14,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:08:14,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:14,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:08:14,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [555936121] [2020-10-28 00:08:14,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:08:14,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-28 00:08:14,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978905082] [2020-10-28 00:08:14,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 00:08:14,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:08:14,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 00:08:14,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:08:14,601 INFO L87 Difference]: Start difference. First operand 3009 states and 4167 transitions. Second operand 11 states. [2020-10-28 00:08:15,510 WARN L193 SmtUtils]: Spent 827.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2020-10-28 00:08:20,865 WARN L193 SmtUtils]: Spent 925.00 ms on a formula simplification that was a NOOP. DAG size: 353 [2020-10-28 00:08:22,170 WARN L193 SmtUtils]: Spent 848.00 ms on a formula simplification that was a NOOP. DAG size: 345 [2020-10-28 00:08:25,003 WARN L193 SmtUtils]: Spent 913.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2020-10-28 00:08:26,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:08:26,417 INFO L93 Difference]: Finished difference Result 15348 states and 23043 transitions. [2020-10-28 00:08:26,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 00:08:26,417 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-10-28 00:08:26,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:08:26,488 INFO L225 Difference]: With dead ends: 15348 [2020-10-28 00:08:26,489 INFO L226 Difference]: Without dead ends: 13598 [2020-10-28 00:08:26,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=214, Invalid=908, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 00:08:26,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13598 states. [2020-10-28 00:08:26,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13598 to 3632. [2020-10-28 00:08:26,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3632 states. [2020-10-28 00:08:26,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3632 states to 3632 states and 5173 transitions. [2020-10-28 00:08:26,864 INFO L78 Accepts]: Start accepts. Automaton has 3632 states and 5173 transitions. Word has length 57 [2020-10-28 00:08:26,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:08:26,865 INFO L481 AbstractCegarLoop]: Abstraction has 3632 states and 5173 transitions. [2020-10-28 00:08:26,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 00:08:26,865 INFO L276 IsEmpty]: Start isEmpty. Operand 3632 states and 5173 transitions. [2020-10-28 00:08:26,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 00:08:26,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:08:26,872 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:08:26,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 00:08:26,872 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:08:26,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:08:26,873 INFO L82 PathProgramCache]: Analyzing trace with hash -636135544, now seen corresponding path program 1 times [2020-10-28 00:08:26,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:08:26,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1207415761] [2020-10-28 00:08:26,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:08:26,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:26,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:27,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:27,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:27,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:27,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:28,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:28,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:29,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:30,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:30,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:30,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:31,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:31,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:31,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 00:08:31,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 00:08:31,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 00:08:31,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:31,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 00:08:31,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 00:08:31,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 00:08:31,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:33,017 WARN L193 SmtUtils]: Spent 796.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 00:08:33,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:08:33,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:33,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:33,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:33,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:08:33,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:08:33,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 00:08:33,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:33,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:08:33,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:08:33,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:08:33,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:33,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:08:33,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1207415761] [2020-10-28 00:08:33,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:08:33,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-28 00:08:33,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431228128] [2020-10-28 00:08:33,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 00:08:33,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:08:33,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 00:08:33,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-28 00:08:33,079 INFO L87 Difference]: Start difference. First operand 3632 states and 5173 transitions. Second operand 10 states. [2020-10-28 00:08:35,161 WARN L193 SmtUtils]: Spent 1.84 s on a formula simplification. DAG size of input: 364 DAG size of output: 362 [2020-10-28 00:08:41,364 WARN L193 SmtUtils]: Spent 830.00 ms on a formula simplification that was a NOOP. DAG size: 343 [2020-10-28 00:08:44,439 WARN L193 SmtUtils]: Spent 800.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2020-10-28 00:08:45,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:08:45,659 INFO L93 Difference]: Finished difference Result 8367 states and 12544 transitions. [2020-10-28 00:08:45,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 00:08:45,663 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 57 [2020-10-28 00:08:45,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:08:45,696 INFO L225 Difference]: With dead ends: 8367 [2020-10-28 00:08:45,696 INFO L226 Difference]: Without dead ends: 6537 [2020-10-28 00:08:45,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2020-10-28 00:08:45,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6537 states. [2020-10-28 00:08:46,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6537 to 4064. [2020-10-28 00:08:46,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4064 states. [2020-10-28 00:08:46,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4064 states to 4064 states and 5816 transitions. [2020-10-28 00:08:46,025 INFO L78 Accepts]: Start accepts. Automaton has 4064 states and 5816 transitions. Word has length 57 [2020-10-28 00:08:46,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:08:46,025 INFO L481 AbstractCegarLoop]: Abstraction has 4064 states and 5816 transitions. [2020-10-28 00:08:46,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 00:08:46,025 INFO L276 IsEmpty]: Start isEmpty. Operand 4064 states and 5816 transitions. [2020-10-28 00:08:46,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 00:08:46,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:08:46,031 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:08:46,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 00:08:46,032 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:08:46,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:08:46,032 INFO L82 PathProgramCache]: Analyzing trace with hash -468120866, now seen corresponding path program 1 times [2020-10-28 00:08:46,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:08:46,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1271441670] [2020-10-28 00:08:46,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:08:46,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:46,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:46,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:46,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:47,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:47,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:48,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:48,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:49,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:49,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:49,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:51,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:51,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 00:08:51,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 00:08:51,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-28 00:08:51,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:51,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 00:08:51,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 00:08:51,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 00:08:51,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:52,199 WARN L193 SmtUtils]: Spent 897.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 00:08:52,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:08:52,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:52,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:52,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:52,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:08:52,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:08:52,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 00:08:52,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:52,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:08:52,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:08:52,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:08:52,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:52,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:08:52,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1271441670] [2020-10-28 00:08:52,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:08:52,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-28 00:08:52,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004784721] [2020-10-28 00:08:52,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 00:08:52,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:08:52,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 00:08:52,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:08:52,249 INFO L87 Difference]: Start difference. First operand 4064 states and 5816 transitions. Second operand 11 states. [2020-10-28 00:08:53,377 WARN L193 SmtUtils]: Spent 959.00 ms on a formula simplification that was a NOOP. DAG size: 364 [2020-10-28 00:08:59,145 WARN L193 SmtUtils]: Spent 884.00 ms on a formula simplification that was a NOOP. DAG size: 349 [2020-10-28 00:09:00,039 WARN L193 SmtUtils]: Spent 846.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2020-10-28 00:09:02,375 WARN L193 SmtUtils]: Spent 845.00 ms on a formula simplification that was a NOOP. DAG size: 345 [2020-10-28 00:09:03,535 WARN L193 SmtUtils]: Spent 807.00 ms on a formula simplification that was a NOOP. DAG size: 344 [2020-10-28 00:09:05,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:09:05,068 INFO L93 Difference]: Finished difference Result 10766 states and 15986 transitions. [2020-10-28 00:09:05,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-28 00:09:05,069 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-10-28 00:09:05,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:09:05,094 INFO L225 Difference]: With dead ends: 10766 [2020-10-28 00:09:05,094 INFO L226 Difference]: Without dead ends: 10760 [2020-10-28 00:09:05,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=257, Invalid=1149, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 00:09:05,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10760 states. [2020-10-28 00:09:05,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10760 to 4064. [2020-10-28 00:09:05,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4064 states. [2020-10-28 00:09:05,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4064 states to 4064 states and 5815 transitions. [2020-10-28 00:09:05,482 INFO L78 Accepts]: Start accepts. Automaton has 4064 states and 5815 transitions. Word has length 57 [2020-10-28 00:09:05,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:09:05,482 INFO L481 AbstractCegarLoop]: Abstraction has 4064 states and 5815 transitions. [2020-10-28 00:09:05,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 00:09:05,482 INFO L276 IsEmpty]: Start isEmpty. Operand 4064 states and 5815 transitions. [2020-10-28 00:09:05,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 00:09:05,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:09:05,488 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:09:05,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 00:09:05,489 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:09:05,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:09:05,489 INFO L82 PathProgramCache]: Analyzing trace with hash 153264034, now seen corresponding path program 1 times [2020-10-28 00:09:05,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:09:05,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1788064535] [2020-10-28 00:09:05,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:09:05,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:05,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:05,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:05,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:06,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:06,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:10,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:10,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 00:09:10,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:09:10,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 00:09:10,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:10,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:09:10,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 00:09:10,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 00:09:10,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:09:11,421 WARN L193 SmtUtils]: Spent 809.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 00:09:11,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:09:11,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:11,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:11,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:11,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:09:11,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:09:11,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-28 00:09:11,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:11,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:09:11,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:09:11,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:09:11,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:09:11,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:09:11,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1788064535] [2020-10-28 00:09:11,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:09:11,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:09:11,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905761914] [2020-10-28 00:09:11,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:09:11,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:09:11,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:09:11,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:09:11,494 INFO L87 Difference]: Start difference. First operand 4064 states and 5815 transitions. Second operand 4 states. [2020-10-28 00:09:15,635 WARN L193 SmtUtils]: Spent 804.00 ms on a formula simplification that was a NOOP. DAG size: 345 [2020-10-28 00:09:16,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:09:16,618 INFO L93 Difference]: Finished difference Result 7252 states and 10797 transitions. [2020-10-28 00:09:16,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:09:16,619 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-10-28 00:09:16,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:09:16,629 INFO L225 Difference]: With dead ends: 7252 [2020-10-28 00:09:16,630 INFO L226 Difference]: Without dead ends: 4857 [2020-10-28 00:09:16,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:09:16,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4857 states. [2020-10-28 00:09:17,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4857 to 4854. [2020-10-28 00:09:17,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4854 states. [2020-10-28 00:09:17,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4854 states to 4854 states and 6991 transitions. [2020-10-28 00:09:17,049 INFO L78 Accepts]: Start accepts. Automaton has 4854 states and 6991 transitions. Word has length 58 [2020-10-28 00:09:17,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:09:17,049 INFO L481 AbstractCegarLoop]: Abstraction has 4854 states and 6991 transitions. [2020-10-28 00:09:17,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:09:17,049 INFO L276 IsEmpty]: Start isEmpty. Operand 4854 states and 6991 transitions. [2020-10-28 00:09:17,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 00:09:17,055 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:09:17,055 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:09:17,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 00:09:17,055 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:09:17,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:09:17,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1048681273, now seen corresponding path program 1 times [2020-10-28 00:09:17,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:09:17,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869099271] [2020-10-28 00:09:17,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:09:17,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:17,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:17,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:17,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:18,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:18,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:21,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:21,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 00:09:21,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:09:21,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4861 [2020-10-28 00:09:21,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:21,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:09:21,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-28 00:09:21,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 00:09:21,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:09:22,816 WARN L193 SmtUtils]: Spent 820.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 00:09:22,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:09:22,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:22,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:22,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:22,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:09:22,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:09:22,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 00:09:22,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:22,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:09:22,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:09:22,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:09:22,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:09:22,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:09:22,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1869099271] [2020-10-28 00:09:22,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:09:22,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:09:22,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477109700] [2020-10-28 00:09:22,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:09:22,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:09:22,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:09:22,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:09:22,868 INFO L87 Difference]: Start difference. First operand 4854 states and 6991 transitions. Second operand 4 states. [2020-10-28 00:09:27,563 WARN L193 SmtUtils]: Spent 905.00 ms on a formula simplification that was a NOOP. DAG size: 345 [2020-10-28 00:09:28,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:09:28,216 INFO L93 Difference]: Finished difference Result 10395 states and 15553 transitions. [2020-10-28 00:09:28,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:09:28,222 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-10-28 00:09:28,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:09:28,239 INFO L225 Difference]: With dead ends: 10395 [2020-10-28 00:09:28,239 INFO L226 Difference]: Without dead ends: 7104 [2020-10-28 00:09:28,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:09:28,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7104 states. [2020-10-28 00:09:28,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7104 to 5439. [2020-10-28 00:09:28,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5439 states. [2020-10-28 00:09:28,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5439 states to 5439 states and 7861 transitions. [2020-10-28 00:09:28,902 INFO L78 Accepts]: Start accepts. Automaton has 5439 states and 7861 transitions. Word has length 58 [2020-10-28 00:09:28,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:09:28,902 INFO L481 AbstractCegarLoop]: Abstraction has 5439 states and 7861 transitions. [2020-10-28 00:09:28,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:09:28,902 INFO L276 IsEmpty]: Start isEmpty. Operand 5439 states and 7861 transitions. [2020-10-28 00:09:28,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 00:09:28,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:09:28,908 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:09:28,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 00:09:28,909 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:09:28,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:09:28,909 INFO L82 PathProgramCache]: Analyzing trace with hash 887398114, now seen corresponding path program 1 times [2020-10-28 00:09:28,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:09:28,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [921241070] [2020-10-28 00:09:28,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:09:28,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:28,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:29,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:29,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:29,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:29,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:29,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:30,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:31,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:33,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:33,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 00:09:33,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:09:33,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4593 [2020-10-28 00:09:33,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:33,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 00:09:33,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 00:09:33,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 00:09:33,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:09:34,488 WARN L193 SmtUtils]: Spent 780.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 00:09:34,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:09:34,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:34,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:34,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:34,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:09:34,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:09:34,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 00:09:34,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:34,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:09:34,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:09:34,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:09:34,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:09:34,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:09:34,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [921241070] [2020-10-28 00:09:34,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:09:34,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-28 00:09:34,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614629017] [2020-10-28 00:09:34,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 00:09:34,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:09:34,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 00:09:34,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-28 00:09:34,541 INFO L87 Difference]: Start difference. First operand 5439 states and 7861 transitions. Second operand 10 states. [2020-10-28 00:09:35,447 WARN L193 SmtUtils]: Spent 824.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2020-10-28 00:09:40,411 WARN L193 SmtUtils]: Spent 816.00 ms on a formula simplification that was a NOOP. DAG size: 343 [2020-10-28 00:09:41,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:09:41,911 INFO L93 Difference]: Finished difference Result 8861 states and 12999 transitions. [2020-10-28 00:09:41,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 00:09:41,912 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2020-10-28 00:09:41,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:09:41,926 INFO L225 Difference]: With dead ends: 8861 [2020-10-28 00:09:41,927 INFO L226 Difference]: Without dead ends: 8856 [2020-10-28 00:09:41,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2020-10-28 00:09:41,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8856 states. [2020-10-28 00:09:42,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8856 to 5436. [2020-10-28 00:09:42,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5436 states. [2020-10-28 00:09:42,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5436 states to 5436 states and 7857 transitions. [2020-10-28 00:09:42,501 INFO L78 Accepts]: Start accepts. Automaton has 5436 states and 7857 transitions. Word has length 60 [2020-10-28 00:09:42,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:09:42,504 INFO L481 AbstractCegarLoop]: Abstraction has 5436 states and 7857 transitions. [2020-10-28 00:09:42,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 00:09:42,505 INFO L276 IsEmpty]: Start isEmpty. Operand 5436 states and 7857 transitions. [2020-10-28 00:09:42,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 00:09:42,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:09:42,511 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:09:42,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 00:09:42,511 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:09:42,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:09:42,511 INFO L82 PathProgramCache]: Analyzing trace with hash 963715143, now seen corresponding path program 1 times [2020-10-28 00:09:42,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:09:42,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [769133686] [2020-10-28 00:09:42,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:09:42,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:42,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:42,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:42,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:43,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:43,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:43,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:44,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:44,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:46,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:46,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 00:09:46,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:09:46,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4195 [2020-10-28 00:09:46,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:46,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 00:09:46,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 00:09:46,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 00:09:46,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:09:47,816 WARN L193 SmtUtils]: Spent 855.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 00:09:47,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:09:47,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:47,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:47,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:47,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:09:47,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:09:47,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 00:09:47,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:47,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:09:47,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:09:47,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:09:47,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:09:47,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:09:47,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [769133686] [2020-10-28 00:09:47,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:09:47,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-28 00:09:47,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832011258] [2020-10-28 00:09:47,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 00:09:47,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:09:47,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 00:09:47,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:09:47,859 INFO L87 Difference]: Start difference. First operand 5436 states and 7857 transitions. Second operand 11 states. [2020-10-28 00:09:48,824 WARN L193 SmtUtils]: Spent 885.00 ms on a formula simplification that was a NOOP. DAG size: 343 [2020-10-28 00:09:54,050 WARN L193 SmtUtils]: Spent 827.00 ms on a formula simplification that was a NOOP. DAG size: 345 [2020-10-28 00:09:55,142 WARN L193 SmtUtils]: Spent 814.00 ms on a formula simplification that was a NOOP. DAG size: 342 [2020-10-28 00:09:55,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:09:55,728 INFO L93 Difference]: Finished difference Result 8711 states and 12783 transitions. [2020-10-28 00:09:55,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 00:09:55,729 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 60 [2020-10-28 00:09:55,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:09:55,740 INFO L225 Difference]: With dead ends: 8711 [2020-10-28 00:09:55,741 INFO L226 Difference]: Without dead ends: 8328 [2020-10-28 00:09:55,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2020-10-28 00:09:55,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8328 states. [2020-10-28 00:09:56,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8328 to 5435. [2020-10-28 00:09:56,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5435 states. [2020-10-28 00:09:56,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5435 states to 5435 states and 7854 transitions. [2020-10-28 00:09:56,309 INFO L78 Accepts]: Start accepts. Automaton has 5435 states and 7854 transitions. Word has length 60 [2020-10-28 00:09:56,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:09:56,309 INFO L481 AbstractCegarLoop]: Abstraction has 5435 states and 7854 transitions. [2020-10-28 00:09:56,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 00:09:56,310 INFO L276 IsEmpty]: Start isEmpty. Operand 5435 states and 7854 transitions. [2020-10-28 00:09:56,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 00:09:56,315 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:09:56,315 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:09:56,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 00:09:56,315 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:09:56,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:09:56,316 INFO L82 PathProgramCache]: Analyzing trace with hash -260192337, now seen corresponding path program 1 times [2020-10-28 00:09:56,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:09:56,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418802456] [2020-10-28 00:09:56,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:09:56,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:56,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:56,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:56,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:56,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:56,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:57,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:57,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:57,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:59,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:59,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:59,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:59,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:59,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:00,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:00,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:01,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:10:01,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 00:10:01,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 00:10:01,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 00:10:01,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:10:01,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 00:10:01,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 00:10:01,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 00:10:01,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:10:02,358 WARN L193 SmtUtils]: Spent 801.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 00:10:02,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:10:02,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:10:02,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:02,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:10:02,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:10:02,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:10:02,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 00:10:02,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:10:02,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:10:02,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:10:02,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:10:02,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:10:02,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:10:02,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418802456] [2020-10-28 00:10:02,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:10:02,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-28 00:10:02,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570480700] [2020-10-28 00:10:02,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 00:10:02,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:10:02,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 00:10:02,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-28 00:10:02,400 INFO L87 Difference]: Start difference. First operand 5435 states and 7854 transitions. Second operand 10 states. [2020-10-28 00:10:03,303 WARN L193 SmtUtils]: Spent 821.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2020-10-28 00:10:09,660 WARN L193 SmtUtils]: Spent 924.00 ms on a formula simplification that was a NOOP. DAG size: 343 [2020-10-28 00:10:10,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:10:10,608 INFO L93 Difference]: Finished difference Result 6863 states and 9982 transitions. [2020-10-28 00:10:10,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 00:10:10,608 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 61 [2020-10-28 00:10:10,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:10:10,618 INFO L225 Difference]: With dead ends: 6863 [2020-10-28 00:10:10,618 INFO L226 Difference]: Without dead ends: 6851 [2020-10-28 00:10:10,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-10-28 00:10:10,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6851 states. [2020-10-28 00:10:11,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6851 to 5425. [2020-10-28 00:10:11,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5425 states. [2020-10-28 00:10:11,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5425 states to 5425 states and 7843 transitions. [2020-10-28 00:10:11,075 INFO L78 Accepts]: Start accepts. Automaton has 5425 states and 7843 transitions. Word has length 61 [2020-10-28 00:10:11,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:10:11,076 INFO L481 AbstractCegarLoop]: Abstraction has 5425 states and 7843 transitions. [2020-10-28 00:10:11,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 00:10:11,076 INFO L276 IsEmpty]: Start isEmpty. Operand 5425 states and 7843 transitions. [2020-10-28 00:10:11,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-28 00:10:11,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:10:11,081 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:10:11,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 00:10:11,082 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:10:11,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:10:11,082 INFO L82 PathProgramCache]: Analyzing trace with hash -525037902, now seen corresponding path program 1 times [2020-10-28 00:10:11,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:10:11,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [823364886] [2020-10-28 00:10:11,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:10:11,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:10:11,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:11,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:11,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:11,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:11,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:11,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:13,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:10:13,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 00:10:13,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:10:13,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2829 [2020-10-28 00:10:13,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:10:13,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:10:13,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-28 00:10:13,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 00:10:13,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:10:14,794 WARN L193 SmtUtils]: Spent 804.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 00:10:14,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:10:14,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:10:14,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:14,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:10:14,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:10:14,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:10:14,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 00:10:14,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:10:14,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:10:14,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:10:14,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:10:14,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:10:14,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:10:14,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [823364886] [2020-10-28 00:10:14,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:10:14,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:10:14,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133624173] [2020-10-28 00:10:14,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:10:14,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:10:14,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:10:14,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:10:14,846 INFO L87 Difference]: Start difference. First operand 5425 states and 7843 transitions. Second operand 4 states. [2020-10-28 00:10:15,749 WARN L193 SmtUtils]: Spent 850.00 ms on a formula simplification that was a NOOP. DAG size: 343 [2020-10-28 00:10:19,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:10:19,955 INFO L93 Difference]: Finished difference Result 12954 states and 19336 transitions. [2020-10-28 00:10:19,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:10:19,955 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2020-10-28 00:10:19,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:10:19,966 INFO L225 Difference]: With dead ends: 12954 [2020-10-28 00:10:19,966 INFO L226 Difference]: Without dead ends: 9108 [2020-10-28 00:10:19,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:10:19,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9108 states. [2020-10-28 00:10:20,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9108 to 9105. [2020-10-28 00:10:20,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9105 states. [2020-10-28 00:10:20,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9105 states to 9105 states and 13326 transitions. [2020-10-28 00:10:20,796 INFO L78 Accepts]: Start accepts. Automaton has 9105 states and 13326 transitions. Word has length 64 [2020-10-28 00:10:20,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:10:20,796 INFO L481 AbstractCegarLoop]: Abstraction has 9105 states and 13326 transitions. [2020-10-28 00:10:20,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:10:20,796 INFO L276 IsEmpty]: Start isEmpty. Operand 9105 states and 13326 transitions. [2020-10-28 00:10:20,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 00:10:20,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:10:20,801 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:10:20,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 00:10:20,801 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:10:20,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:10:20,802 INFO L82 PathProgramCache]: Analyzing trace with hash 857373782, now seen corresponding path program 1 times [2020-10-28 00:10:20,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:10:20,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [817668111] [2020-10-28 00:10:20,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:10:20,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:10:20,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:20,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:20,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:21,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:21,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:10:21,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 00:10:21,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 00:10:21,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1150 [2020-10-28 00:10:21,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:10:21,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:10:21,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-28 00:10:21,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 00:10:21,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:10:23,005 WARN L193 SmtUtils]: Spent 916.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 00:10:23,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:10:23,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:10:23,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:23,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:10:23,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:10:23,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:10:23,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 00:10:23,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:10:23,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:10:23,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:10:23,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:10:23,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:10:23,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:10:23,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [817668111] [2020-10-28 00:10:23,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:10:23,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:10:23,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863521481] [2020-10-28 00:10:23,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:10:23,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:10:23,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:10:23,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:10:23,056 INFO L87 Difference]: Start difference. First operand 9105 states and 13326 transitions. Second operand 6 states. [2020-10-28 00:10:28,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:10:28,615 INFO L93 Difference]: Finished difference Result 17603 states and 25606 transitions. [2020-10-28 00:10:28,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 00:10:28,616 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-28 00:10:28,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:10:28,634 INFO L225 Difference]: With dead ends: 17603 [2020-10-28 00:10:28,634 INFO L226 Difference]: Without dead ends: 17600 [2020-10-28 00:10:28,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-28 00:10:28,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17600 states. [2020-10-28 00:10:29,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17600 to 9375. [2020-10-28 00:10:29,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9375 states. [2020-10-28 00:10:29,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9375 states to 9375 states and 13596 transitions. [2020-10-28 00:10:29,605 INFO L78 Accepts]: Start accepts. Automaton has 9375 states and 13596 transitions. Word has length 65 [2020-10-28 00:10:29,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:10:29,605 INFO L481 AbstractCegarLoop]: Abstraction has 9375 states and 13596 transitions. [2020-10-28 00:10:29,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:10:29,605 INFO L276 IsEmpty]: Start isEmpty. Operand 9375 states and 13596 transitions. [2020-10-28 00:10:29,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 00:10:29,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:10:29,610 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:10:29,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 00:10:29,610 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:10:29,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:10:29,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1390520410, now seen corresponding path program 1 times [2020-10-28 00:10:29,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:10:29,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [59186651] [2020-10-28 00:10:29,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:10:29,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:10:29,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:29,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:29,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:29,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:29,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:31,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:10:31,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 00:10:31,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:10:31,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1777 [2020-10-28 00:10:31,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:10:31,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:10:31,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-28 00:10:31,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 00:10:31,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:10:32,261 WARN L193 SmtUtils]: Spent 805.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 00:10:32,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:10:32,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:10:32,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:32,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:10:32,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:10:32,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:10:32,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 00:10:32,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:10:32,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:10:32,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:10:32,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:10:32,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:10:32,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:10:32,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [59186651] [2020-10-28 00:10:32,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:10:32,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:10:32,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165779698] [2020-10-28 00:10:32,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:10:32,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:10:32,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:10:32,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:10:32,300 INFO L87 Difference]: Start difference. First operand 9375 states and 13596 transitions. Second operand 4 states. [2020-10-28 00:10:33,309 WARN L193 SmtUtils]: Spent 935.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-28 00:10:38,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:10:38,475 INFO L93 Difference]: Finished difference Result 23151 states and 33948 transitions. [2020-10-28 00:10:38,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:10:38,476 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-28 00:10:38,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:10:38,496 INFO L225 Difference]: With dead ends: 23151 [2020-10-28 00:10:38,496 INFO L226 Difference]: Without dead ends: 15260 [2020-10-28 00:10:38,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:10:38,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15260 states.