/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:12:39,533 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:12:39,539 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:12:39,598 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:12:39,599 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:12:39,606 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:12:39,608 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:12:39,614 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:12:39,617 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:12:39,625 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:12:39,626 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:12:39,628 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:12:39,628 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:12:39,632 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:12:39,634 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:12:39,635 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:12:39,637 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:12:39,640 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:12:39,647 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:12:39,655 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:12:39,657 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:12:39,659 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:12:39,660 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:12:39,663 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:12:39,681 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:12:39,682 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:12:39,682 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:12:39,684 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:12:39,685 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:12:39,686 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:12:39,686 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:12:39,687 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:12:39,689 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:12:39,690 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:12:39,691 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:12:39,691 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:12:39,692 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:12:39,692 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:12:39,692 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:12:39,693 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:12:39,694 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:12:39,701 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 13:12:39,748 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:12:39,749 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:12:39,753 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:12:39,753 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:12:39,753 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:12:39,754 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:12:39,754 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:12:39,754 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:12:39,754 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:12:39,754 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:12:39,755 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:12:39,756 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:12:39,756 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:12:39,756 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:12:39,756 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:12:39,756 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:12:39,757 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:12:39,757 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:12:39,757 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:12:39,757 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:12:39,757 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:12:39,758 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:12:39,758 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:12:39,758 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:12:39,758 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:12:39,758 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:12:39,759 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:12:39,759 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:12:39,759 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:12:39,759 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:12:40,189 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:12:40,221 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:12:40,225 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:12:40,226 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:12:40,227 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:12:40,228 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-29 13:12:40,316 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/52983c14d/72162300c14243b6875cba4322276ee2/FLAGb42301a7a [2020-10-29 13:12:41,001 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:12:41,002 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-29 13:12:41,025 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/52983c14d/72162300c14243b6875cba4322276ee2/FLAGb42301a7a [2020-10-29 13:12:41,282 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/52983c14d/72162300c14243b6875cba4322276ee2 [2020-10-29 13:12:41,286 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:12:41,294 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:12:41,299 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:12:41,299 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:12:41,303 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:12:41,304 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:12:41" (1/1) ... [2020-10-29 13:12:41,311 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@99120a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:12:41, skipping insertion in model container [2020-10-29 13:12:41,312 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:12:41" (1/1) ... [2020-10-29 13:12:41,320 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:12:41,391 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:12:41,775 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:12:41,789 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:12:41,935 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:12:41,956 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:12:41,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:12:41 WrapperNode [2020-10-29 13:12:41,956 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:12:41,958 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:12:41,958 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:12:41,958 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:12:41,972 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:12:41" (1/1) ... [2020-10-29 13:12:41,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:12:41" (1/1) ... [2020-10-29 13:12:41,992 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:12:41" (1/1) ... [2020-10-29 13:12:41,993 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:12:41" (1/1) ... [2020-10-29 13:12:42,018 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:12:41" (1/1) ... [2020-10-29 13:12:42,033 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:12:41" (1/1) ... [2020-10-29 13:12:42,039 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:12:41" (1/1) ... [2020-10-29 13:12:42,052 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:12:42,053 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:12:42,053 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:12:42,053 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:12:42,058 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:12:41" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:12:42,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:12:42,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:12:42,193 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:12:42,193 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:12:42,194 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:12:42,194 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:12:42,194 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:12:42,195 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:12:42,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:12:42,195 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:12:42,195 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:12:42,195 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-29 13:12:42,196 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:12:42,196 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:12:42,198 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:12:42,198 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:12:42,199 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:12:42,199 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:12:42,199 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:12:42,199 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:12:42,199 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:12:42,199 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:12:42,200 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:12:42,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:12:42,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:12:42,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:12:42,205 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:12:42,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:12:43,294 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:12:43,295 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:12:43,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:12:43 BoogieIcfgContainer [2020-10-29 13:12:43,297 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:12:43,300 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:12:43,300 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:12:43,303 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:12:43,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:12:41" (1/3) ... [2020-10-29 13:12:43,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fdb1391 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:12:43, skipping insertion in model container [2020-10-29 13:12:43,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:12:41" (2/3) ... [2020-10-29 13:12:43,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fdb1391 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:12:43, skipping insertion in model container [2020-10-29 13:12:43,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:12:43" (3/3) ... [2020-10-29 13:12:43,307 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-29 13:12:43,321 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:12:43,327 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:12:43,341 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:12:43,371 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:12:43,371 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:12:43,372 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:12:43,372 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:12:43,372 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:12:43,372 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:12:43,372 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:12:43,372 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:12:43,396 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2020-10-29 13:12:43,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-29 13:12:43,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:12:43,408 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] [2020-10-29 13:12:43,408 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:12:43,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:12:43,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1835724327, now seen corresponding path program 1 times [2020-10-29 13:12:43,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:12:43,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418717394] [2020-10-29 13:12:43,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:12:43,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:12:43,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:44,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:44,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:44,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:45,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:45,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:45,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:45,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:46,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:46,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:47,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:48,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:12:48,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-29 13:12:48,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 13:12:48,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-29 13:12:48,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:12:48,806 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:12:48,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:12:48,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:12:48,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 13:12:48,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-29 13:12:49,179 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:12:49,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:12:49,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:12:49,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:49,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:12:49,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:12:49,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:12:49,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 13:12:49,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:12:49,211 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:12:49,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:12:49,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:12:49,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:12:49,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:12:49,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:12:49,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418717394] [2020-10-29 13:12:49,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:12:49,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:12:49,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140548997] [2020-10-29 13:12:49,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:12:49,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:12:49,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:12:49,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:12:49,264 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 6 states. [2020-10-29 13:12:49,569 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-29 13:12:51,059 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-29 13:12:51,523 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-29 13:12:52,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:12:52,486 INFO L93 Difference]: Finished difference Result 681 states and 1137 transitions. [2020-10-29 13:12:52,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:12:52,490 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 51 [2020-10-29 13:12:52,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:12:52,520 INFO L225 Difference]: With dead ends: 681 [2020-10-29 13:12:52,520 INFO L226 Difference]: Without dead ends: 576 [2020-10-29 13:12:52,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 13:12:52,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2020-10-29 13:12:52,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 385. [2020-10-29 13:12:52,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2020-10-29 13:12:52,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 531 transitions. [2020-10-29 13:12:52,631 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 531 transitions. Word has length 51 [2020-10-29 13:12:52,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:12:52,632 INFO L481 AbstractCegarLoop]: Abstraction has 385 states and 531 transitions. [2020-10-29 13:12:52,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:12:52,632 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 531 transitions. [2020-10-29 13:12:52,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-29 13:12:52,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:12:52,636 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] [2020-10-29 13:12:52,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:12:52,637 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:12:52,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:12:52,638 INFO L82 PathProgramCache]: Analyzing trace with hash 984145560, now seen corresponding path program 1 times [2020-10-29 13:12:52,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:12:52,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1728028563] [2020-10-29 13:12:52,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:12:52,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:12:52,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:52,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:52,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:53,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:53,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:53,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:53,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:53,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:54,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:55,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:56,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:57,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:12:57,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-29 13:12:57,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 13:12:57,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 13:12:57,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:12:57,704 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:12:57,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:12:57,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:12:57,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 13:12:57,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:12:58,033 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:12:58,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:12:58,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:12:58,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:58,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:12:58,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:12:58,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:12:58,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-29 13:12:58,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:12:58,081 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:12:58,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:12:58,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:12:58,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:12:58,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:12:58,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:12:58,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1728028563] [2020-10-29 13:12:58,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:12:58,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:12:58,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85248420] [2020-10-29 13:12:58,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:12:58,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:12:58,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:12:58,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:12:58,108 INFO L87 Difference]: Start difference. First operand 385 states and 531 transitions. Second operand 6 states. [2020-10-29 13:12:58,418 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-29 13:12:59,358 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-29 13:12:59,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:12:59,664 INFO L93 Difference]: Finished difference Result 895 states and 1273 transitions. [2020-10-29 13:12:59,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:12:59,665 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 51 [2020-10-29 13:12:59,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:12:59,669 INFO L225 Difference]: With dead ends: 895 [2020-10-29 13:12:59,670 INFO L226 Difference]: Without dead ends: 574 [2020-10-29 13:12:59,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:12:59,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2020-10-29 13:12:59,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 552. [2020-10-29 13:12:59,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 552 states. [2020-10-29 13:12:59,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 784 transitions. [2020-10-29 13:12:59,731 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 784 transitions. Word has length 51 [2020-10-29 13:12:59,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:12:59,731 INFO L481 AbstractCegarLoop]: Abstraction has 552 states and 784 transitions. [2020-10-29 13:12:59,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:12:59,731 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 784 transitions. [2020-10-29 13:12:59,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 13:12:59,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:12:59,739 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] [2020-10-29 13:12:59,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:12:59,740 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:12:59,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:12:59,742 INFO L82 PathProgramCache]: Analyzing trace with hash 725720351, now seen corresponding path program 1 times [2020-10-29 13:12:59,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:12:59,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [930417554] [2020-10-29 13:12:59,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:12:59,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:12:59,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:59,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:59,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:59,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:00,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:00,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:00,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:01,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:03,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:03,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:03,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:03,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:03,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:04,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:04,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:04,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-29 13:13:04,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 13:13:04,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-29 13:13:04,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:04,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:04,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:13:04,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:13:04,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 13:13:04,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:13:05,128 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:13:05,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:13:05,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:05,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:05,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:05,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:13:05,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:13:05,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:13:05,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:05,150 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:05,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:13:05,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:13:05,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:13:05,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:13:05,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:13:05,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [930417554] [2020-10-29 13:13:05,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:13:05,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:13:05,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993853049] [2020-10-29 13:13:05,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:13:05,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:13:05,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:13:05,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:13:05,172 INFO L87 Difference]: Start difference. First operand 552 states and 784 transitions. Second operand 7 states. [2020-10-29 13:13:05,472 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-29 13:13:06,275 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-29 13:13:06,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:13:06,683 INFO L93 Difference]: Finished difference Result 1081 states and 1596 transitions. [2020-10-29 13:13:06,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 13:13:06,685 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 52 [2020-10-29 13:13:06,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:13:06,689 INFO L225 Difference]: With dead ends: 1081 [2020-10-29 13:13:06,691 INFO L226 Difference]: Without dead ends: 687 [2020-10-29 13:13:06,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-29 13:13:06,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2020-10-29 13:13:06,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 502. [2020-10-29 13:13:06,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 502 states. [2020-10-29 13:13:06,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 720 transitions. [2020-10-29 13:13:06,748 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 720 transitions. Word has length 52 [2020-10-29 13:13:06,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:13:06,750 INFO L481 AbstractCegarLoop]: Abstraction has 502 states and 720 transitions. [2020-10-29 13:13:06,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:13:06,750 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 720 transitions. [2020-10-29 13:13:06,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-29 13:13:06,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:13:06,754 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] [2020-10-29 13:13:06,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:13:06,755 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:13:06,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:13:06,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1306243887, now seen corresponding path program 1 times [2020-10-29 13:13:06,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:13:06,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [558313452] [2020-10-29 13:13:06,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:13:06,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:06,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:06,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:06,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:07,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:07,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:07,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:07,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:07,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:07,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:08,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:08,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:10,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:10,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:10,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:11,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:11,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:11,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:11,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:11,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-29 13:13:11,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-29 13:13:11,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 13:13:11,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:11,797 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:11,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:13:11,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:13:11,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 13:13:11,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:12,091 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:13:12,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:13:12,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:12,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:12,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:12,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:13:12,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:13:12,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:13:12,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:12,112 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:12,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:13:12,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:13:12,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:13:12,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:13:12,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:13:12,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [558313452] [2020-10-29 13:13:12,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:13:12,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:13:12,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117831916] [2020-10-29 13:13:12,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:13:12,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:13:12,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:13:12,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:13:12,133 INFO L87 Difference]: Start difference. First operand 502 states and 720 transitions. Second operand 8 states. [2020-10-29 13:13:12,437 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-29 13:13:13,364 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-29 13:13:13,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:13:13,995 INFO L93 Difference]: Finished difference Result 939 states and 1395 transitions. [2020-10-29 13:13:13,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 13:13:13,995 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2020-10-29 13:13:13,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:13:14,000 INFO L225 Difference]: With dead ends: 939 [2020-10-29 13:13:14,000 INFO L226 Difference]: Without dead ends: 599 [2020-10-29 13:13:14,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-29 13:13:14,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2020-10-29 13:13:14,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 502. [2020-10-29 13:13:14,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 502 states. [2020-10-29 13:13:14,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 717 transitions. [2020-10-29 13:13:14,063 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 717 transitions. Word has length 53 [2020-10-29 13:13:14,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:13:14,064 INFO L481 AbstractCegarLoop]: Abstraction has 502 states and 717 transitions. [2020-10-29 13:13:14,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:13:14,064 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 717 transitions. [2020-10-29 13:13:14,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-29 13:13:14,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:13:14,066 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] [2020-10-29 13:13:14,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:13:14,067 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:13:14,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:13:14,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1406790542, now seen corresponding path program 1 times [2020-10-29 13:13:14,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:13:14,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [864368085] [2020-10-29 13:13:14,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:13:14,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:14,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:14,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:14,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:14,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:14,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:14,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:15,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:15,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:15,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:15,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:15,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:15,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:17,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:17,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:18,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:18,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:19,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:19,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-29 13:13:19,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-29 13:13:19,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-29 13:13:19,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:19,117 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:19,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:13:19,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 13:13:19,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-29 13:13:19,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:19,538 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:13:19,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:13:19,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:19,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:19,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:19,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:13:19,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:13:19,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 13:13:19,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:19,567 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:19,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:13:19,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:13:19,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:13:19,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:19,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:13:19,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [864368085] [2020-10-29 13:13:19,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:13:19,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:13:19,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367315833] [2020-10-29 13:13:19,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:13:19,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:13:19,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:13:19,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:13:19,589 INFO L87 Difference]: Start difference. First operand 502 states and 717 transitions. Second operand 6 states. [2020-10-29 13:13:19,896 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-29 13:13:20,863 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-29 13:13:21,195 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-29 13:13:22,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:13:22,216 INFO L93 Difference]: Finished difference Result 2677 states and 4043 transitions. [2020-10-29 13:13:22,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:13:22,217 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2020-10-29 13:13:22,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:13:22,231 INFO L225 Difference]: With dead ends: 2677 [2020-10-29 13:13:22,232 INFO L226 Difference]: Without dead ends: 2342 [2020-10-29 13:13:22,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:13:22,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2342 states. [2020-10-29 13:13:22,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2342 to 1632. [2020-10-29 13:13:22,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1632 states. [2020-10-29 13:13:22,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1632 states to 1632 states and 2429 transitions. [2020-10-29 13:13:22,374 INFO L78 Accepts]: Start accepts. Automaton has 1632 states and 2429 transitions. Word has length 53 [2020-10-29 13:13:22,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:13:22,377 INFO L481 AbstractCegarLoop]: Abstraction has 1632 states and 2429 transitions. [2020-10-29 13:13:22,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:13:22,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1632 states and 2429 transitions. [2020-10-29 13:13:22,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-29 13:13:22,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:13:22,379 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] [2020-10-29 13:13:22,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:13:22,380 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:13:22,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:13:22,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1614820578, now seen corresponding path program 1 times [2020-10-29 13:13:22,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:13:22,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446741946] [2020-10-29 13:13:22,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:13:22,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:22,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:22,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:22,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:22,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:23,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:23,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:23,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:23,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:23,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:23,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:23,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:24,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:24,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:25,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:25,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:25,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:25,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:25,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:25,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:26,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:26,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:26,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:26,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:27,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:27,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-29 13:13:27,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-29 13:13:27,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 13:13:27,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:27,407 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:27,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:13:27,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:13:27,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 13:13:27,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:27,834 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:13:27,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:13:27,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:27,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:27,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:27,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:13:27,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:13:27,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:13:27,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:27,857 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:27,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:13:27,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:13:27,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:13:27,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:13:27,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:13:27,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [446741946] [2020-10-29 13:13:27,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:13:27,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:13:27,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139303162] [2020-10-29 13:13:27,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:13:27,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:13:27,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:13:27,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:13:27,887 INFO L87 Difference]: Start difference. First operand 1632 states and 2429 transitions. Second operand 8 states. [2020-10-29 13:13:28,212 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-29 13:13:29,168 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-29 13:13:29,417 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-29 13:13:30,556 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-29 13:13:30,848 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-29 13:13:31,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:13:31,174 INFO L93 Difference]: Finished difference Result 6218 states and 9458 transitions. [2020-10-29 13:13:31,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 13:13:31,175 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2020-10-29 13:13:31,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:13:31,202 INFO L225 Difference]: With dead ends: 6218 [2020-10-29 13:13:31,202 INFO L226 Difference]: Without dead ends: 4832 [2020-10-29 13:13:31,208 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2020-10-29 13:13:31,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4832 states. [2020-10-29 13:13:31,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4832 to 1570. [2020-10-29 13:13:31,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1570 states. [2020-10-29 13:13:31,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1570 states to 1570 states and 2331 transitions. [2020-10-29 13:13:31,382 INFO L78 Accepts]: Start accepts. Automaton has 1570 states and 2331 transitions. Word has length 54 [2020-10-29 13:13:31,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:13:31,382 INFO L481 AbstractCegarLoop]: Abstraction has 1570 states and 2331 transitions. [2020-10-29 13:13:31,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:13:31,382 INFO L276 IsEmpty]: Start isEmpty. Operand 1570 states and 2331 transitions. [2020-10-29 13:13:31,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-29 13:13:31,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:13:31,384 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] [2020-10-29 13:13:31,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:13:31,384 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:13:31,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:13:31,385 INFO L82 PathProgramCache]: Analyzing trace with hash -431244799, now seen corresponding path program 1 times [2020-10-29 13:13:31,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:13:31,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160593943] [2020-10-29 13:13:31,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:13:31,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:31,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:31,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:31,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:31,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:31,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:31,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:31,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:32,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:32,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:32,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:32,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:33,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:33,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:34,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:35,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:35,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:35,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:35,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:36,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:36,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:36,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-29 13:13:36,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-29 13:13:36,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-29 13:13:36,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:36,436 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:36,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:13:36,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:13:36,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 13:13:36,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:36,882 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:13:36,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:13:36,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:36,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:36,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:36,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:13:36,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:13:36,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:13:36,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:36,901 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:36,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:13:36,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:13:36,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:13:36,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:36,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:13:36,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160593943] [2020-10-29 13:13:36,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:13:36,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:13:36,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925686703] [2020-10-29 13:13:36,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:13:36,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:13:36,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:13:36,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:13:36,925 INFO L87 Difference]: Start difference. First operand 1570 states and 2331 transitions. Second operand 8 states. [2020-10-29 13:13:37,310 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-29 13:13:38,634 WARN L193 SmtUtils]: Spent 594.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 183 [2020-10-29 13:13:38,982 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-29 13:13:39,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:13:39,363 INFO L93 Difference]: Finished difference Result 2386 states and 3591 transitions. [2020-10-29 13:13:39,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:13:39,364 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2020-10-29 13:13:39,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:13:39,375 INFO L225 Difference]: With dead ends: 2386 [2020-10-29 13:13:39,375 INFO L226 Difference]: Without dead ends: 1689 [2020-10-29 13:13:39,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-29 13:13:39,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1689 states. [2020-10-29 13:13:39,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1689 to 1198. [2020-10-29 13:13:39,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1198 states. [2020-10-29 13:13:39,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 1763 transitions. [2020-10-29 13:13:39,515 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 1763 transitions. Word has length 54 [2020-10-29 13:13:39,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:13:39,519 INFO L481 AbstractCegarLoop]: Abstraction has 1198 states and 1763 transitions. [2020-10-29 13:13:39,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:13:39,519 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 1763 transitions. [2020-10-29 13:13:39,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 13:13:39,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:13:39,520 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] [2020-10-29 13:13:39,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:13:39,521 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:13:39,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:13:39,521 INFO L82 PathProgramCache]: Analyzing trace with hash 719050979, now seen corresponding path program 1 times [2020-10-29 13:13:39,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:13:39,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236038300] [2020-10-29 13:13:39,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:13:39,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:39,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:39,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:39,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:39,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:39,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:39,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:40,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:40,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:40,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:40,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:40,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:40,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:41,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:41,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:42,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:42,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:42,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:42,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:44,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:44,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:44,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-29 13:13:44,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-29 13:13:44,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 13:13:44,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:44,556 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:44,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:13:44,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:13:44,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-29 13:13:44,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:44,880 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:13:44,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:13:44,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:44,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:44,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:44,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:13:44,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:13:44,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 13:13:44,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:44,909 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:44,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:13:44,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:13:44,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:13:44,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:44,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:13:44,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236038300] [2020-10-29 13:13:44,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:13:44,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:13:44,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662961481] [2020-10-29 13:13:44,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:13:44,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:13:44,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:13:44,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:13:44,945 INFO L87 Difference]: Start difference. First operand 1198 states and 1763 transitions. Second operand 9 states. [2020-10-29 13:13:45,252 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-29 13:13:46,066 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-29 13:13:46,799 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-29 13:13:47,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:13:47,150 INFO L93 Difference]: Finished difference Result 5606 states and 8489 transitions. [2020-10-29 13:13:47,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:13:47,150 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 55 [2020-10-29 13:13:47,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:13:47,175 INFO L225 Difference]: With dead ends: 5606 [2020-10-29 13:13:47,175 INFO L226 Difference]: Without dead ends: 4627 [2020-10-29 13:13:47,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-29 13:13:47,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4627 states. [2020-10-29 13:13:47,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4627 to 1165. [2020-10-29 13:13:47,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1165 states. [2020-10-29 13:13:47,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 1706 transitions. [2020-10-29 13:13:47,397 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 1706 transitions. Word has length 55 [2020-10-29 13:13:47,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:13:47,397 INFO L481 AbstractCegarLoop]: Abstraction has 1165 states and 1706 transitions. [2020-10-29 13:13:47,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:13:47,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 1706 transitions. [2020-10-29 13:13:47,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 13:13:47,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:13:47,398 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] [2020-10-29 13:13:47,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:13:47,399 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:13:47,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:13:47,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1988113965, now seen corresponding path program 1 times [2020-10-29 13:13:47,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:13:47,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1448782703] [2020-10-29 13:13:47,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:13:47,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:47,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:47,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:47,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:47,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:47,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:47,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:47,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:48,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:48,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:48,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:49,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:49,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:49,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:49,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:50,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:51,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:51,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:51,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:51,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:51,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:52,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:52,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:52,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:52,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:52,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:52,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-29 13:13:52,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 24 [2020-10-29 13:13:52,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 13:13:52,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:52,430 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:52,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:13:52,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:13:52,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-29 13:13:52,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:52,843 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:13:52,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:13:52,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:52,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:52,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:52,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:13:52,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:13:52,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-29 13:13:52,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:52,877 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:52,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:13:52,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:13:52,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:13:52,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:52,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:13:52,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1448782703] [2020-10-29 13:13:52,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:13:52,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:13:52,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909656315] [2020-10-29 13:13:52,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:13:52,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:13:52,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:13:52,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:13:52,905 INFO L87 Difference]: Start difference. First operand 1165 states and 1706 transitions. Second operand 8 states. [2020-10-29 13:13:53,171 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-29 13:13:53,912 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-29 13:13:54,554 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-29 13:13:54,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:13:54,704 INFO L93 Difference]: Finished difference Result 2440 states and 3592 transitions. [2020-10-29 13:13:54,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:13:54,704 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 55 [2020-10-29 13:13:54,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:13:54,715 INFO L225 Difference]: With dead ends: 2440 [2020-10-29 13:13:54,716 INFO L226 Difference]: Without dead ends: 2426 [2020-10-29 13:13:54,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-29 13:13:54,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2426 states. [2020-10-29 13:13:54,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2426 to 1167. [2020-10-29 13:13:54,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1167 states. [2020-10-29 13:13:54,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 1708 transitions. [2020-10-29 13:13:54,882 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 1708 transitions. Word has length 55 [2020-10-29 13:13:54,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:13:54,882 INFO L481 AbstractCegarLoop]: Abstraction has 1167 states and 1708 transitions. [2020-10-29 13:13:54,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:13:54,883 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 1708 transitions. [2020-10-29 13:13:54,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-29 13:13:54,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:13:54,884 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] [2020-10-29 13:13:54,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:13:54,884 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:13:54,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:13:54,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1705406796, now seen corresponding path program 1 times [2020-10-29 13:13:54,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:13:54,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1925804895] [2020-10-29 13:13:54,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:13:54,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:54,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:54,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:55,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:55,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 13:13:55,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:13:55,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 856 [2020-10-29 13:13:55,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:55,773 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:55,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:13:55,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:13:55,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-29 13:13:55,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:56,097 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:13:56,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:13:56,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:56,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:56,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:56,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:13:56,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:13:56,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:13:56,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:56,116 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:56,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:13:56,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:13:56,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:13:56,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:56,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:13:56,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1925804895] [2020-10-29 13:13:56,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:13:56,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:13:56,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242285679] [2020-10-29 13:13:56,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:13:56,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:13:56,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:13:56,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:13:56,134 INFO L87 Difference]: Start difference. First operand 1167 states and 1708 transitions. Second operand 9 states. [2020-10-29 13:13:56,424 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-29 13:13:57,330 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-29 13:13:57,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:13:57,944 INFO L93 Difference]: Finished difference Result 2124 states and 3165 transitions. [2020-10-29 13:13:57,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:13:57,945 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2020-10-29 13:13:57,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:13:57,954 INFO L225 Difference]: With dead ends: 2124 [2020-10-29 13:13:57,954 INFO L226 Difference]: Without dead ends: 2117 [2020-10-29 13:13:57,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-29 13:13:57,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2117 states. [2020-10-29 13:13:58,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2117 to 1162. [2020-10-29 13:13:58,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1162 states. [2020-10-29 13:13:58,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1700 transitions. [2020-10-29 13:13:58,170 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1700 transitions. Word has length 56 [2020-10-29 13:13:58,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:13:58,170 INFO L481 AbstractCegarLoop]: Abstraction has 1162 states and 1700 transitions. [2020-10-29 13:13:58,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:13:58,171 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1700 transitions. [2020-10-29 13:13:58,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-29 13:13:58,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:13:58,172 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] [2020-10-29 13:13:58,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 13:13:58,172 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:13:58,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:13:58,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1440500839, now seen corresponding path program 1 times [2020-10-29 13:13:58,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:13:58,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [961521852] [2020-10-29 13:13:58,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:13:58,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:58,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:58,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:58,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:58,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:58,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:58,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:59,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:59,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:59,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:59,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:02,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:02,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 13:14:02,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 13:14:02,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4445 [2020-10-29 13:14:02,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:02,642 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:02,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:14:02,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 13:14:02,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 13:14:02,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:02,928 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:14:02,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:14:02,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:02,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:02,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:02,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:14:02,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:14:02,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 13:14:02,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:02,944 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:02,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:14:02,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:14:02,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:14:02,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:02,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:14:02,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [961521852] [2020-10-29 13:14:02,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:14:02,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:14:02,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149248614] [2020-10-29 13:14:02,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:14:02,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:14:02,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:14:02,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:14:02,954 INFO L87 Difference]: Start difference. First operand 1162 states and 1700 transitions. Second operand 6 states. [2020-10-29 13:14:03,242 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-29 13:14:04,878 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-29 13:14:05,174 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-29 13:14:05,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:14:05,317 INFO L93 Difference]: Finished difference Result 1532 states and 2243 transitions. [2020-10-29 13:14:05,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:14:05,318 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-10-29 13:14:05,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:14:05,324 INFO L225 Difference]: With dead ends: 1532 [2020-10-29 13:14:05,325 INFO L226 Difference]: Without dead ends: 1522 [2020-10-29 13:14:05,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:14:05,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1522 states. [2020-10-29 13:14:05,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1522 to 1160. [2020-10-29 13:14:05,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1160 states. [2020-10-29 13:14:05,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1697 transitions. [2020-10-29 13:14:05,491 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1697 transitions. Word has length 56 [2020-10-29 13:14:05,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:14:05,491 INFO L481 AbstractCegarLoop]: Abstraction has 1160 states and 1697 transitions. [2020-10-29 13:14:05,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:14:05,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1697 transitions. [2020-10-29 13:14:05,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-29 13:14:05,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:14:05,492 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] [2020-10-29 13:14:05,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 13:14:05,493 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:14:05,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:14:05,493 INFO L82 PathProgramCache]: Analyzing trace with hash 867709920, now seen corresponding path program 1 times [2020-10-29 13:14:05,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:14:05,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108809537] [2020-10-29 13:14:05,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:14:05,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:05,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:05,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:05,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:06,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:06,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:06,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:06,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:06,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:08,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:08,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 13:14:08,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:14:08,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2579 [2020-10-29 13:14:08,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:08,094 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:08,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:14:08,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:14:08,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-29 13:14:08,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:08,492 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:14:08,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:14:08,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:08,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:08,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:08,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:14:08,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:14:08,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:14:08,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:08,510 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:08,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:14:08,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:14:08,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:14:08,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:14:08,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:14:08,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108809537] [2020-10-29 13:14:08,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:14:08,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:14:08,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497762876] [2020-10-29 13:14:08,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:14:08,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:14:08,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:14:08,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:14:08,539 INFO L87 Difference]: Start difference. First operand 1160 states and 1697 transitions. Second operand 9 states. [2020-10-29 13:14:08,834 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-29 13:14:10,219 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-29 13:14:10,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:14:10,273 INFO L93 Difference]: Finished difference Result 1163 states and 1699 transitions. [2020-10-29 13:14:10,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:14:10,273 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2020-10-29 13:14:10,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:14:10,277 INFO L225 Difference]: With dead ends: 1163 [2020-10-29 13:14:10,277 INFO L226 Difference]: Without dead ends: 1147 [2020-10-29 13:14:10,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-10-29 13:14:10,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2020-10-29 13:14:10,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1146. [2020-10-29 13:14:10,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1146 states. [2020-10-29 13:14:10,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1146 states to 1146 states and 1679 transitions. [2020-10-29 13:14:10,456 INFO L78 Accepts]: Start accepts. Automaton has 1146 states and 1679 transitions. Word has length 56 [2020-10-29 13:14:10,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:14:10,457 INFO L481 AbstractCegarLoop]: Abstraction has 1146 states and 1679 transitions. [2020-10-29 13:14:10,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:14:10,457 INFO L276 IsEmpty]: Start isEmpty. Operand 1146 states and 1679 transitions. [2020-10-29 13:14:10,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-29 13:14:10,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:14:10,459 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:14:10,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 13:14:10,460 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:14:10,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:14:10,460 INFO L82 PathProgramCache]: Analyzing trace with hash 235258603, now seen corresponding path program 1 times [2020-10-29 13:14:10,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:14:10,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1166896985] [2020-10-29 13:14:10,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:14:10,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:10,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:10,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:10,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:10,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:10,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:10,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:10,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:10,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:11,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:11,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:15,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:15,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 13:14:15,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 13:14:15,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 13:14:15,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:15,487 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:15,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:14:15,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:14:15,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-29 13:14:15,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:15,779 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:14:15,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:14:15,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:15,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:15,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:15,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:14:15,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:14:15,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:14:15,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:15,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:15,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:14:15,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:14:15,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:14:15,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:15,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:14:15,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1166896985] [2020-10-29 13:14:15,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:14:15,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:14:15,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235249611] [2020-10-29 13:14:15,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:14:15,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:14:15,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:14:15,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:14:15,810 INFO L87 Difference]: Start difference. First operand 1146 states and 1679 transitions. Second operand 6 states. [2020-10-29 13:14:16,114 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-29 13:14:17,063 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-29 13:14:17,327 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-29 13:14:17,678 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-29 13:14:17,944 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-29 13:14:18,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:14:18,311 INFO L93 Difference]: Finished difference Result 6792 states and 10403 transitions. [2020-10-29 13:14:18,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:14:18,311 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-10-29 13:14:18,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:14:18,336 INFO L225 Difference]: With dead ends: 6792 [2020-10-29 13:14:18,336 INFO L226 Difference]: Without dead ends: 5851 [2020-10-29 13:14:18,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-29 13:14:18,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5851 states. [2020-10-29 13:14:18,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5851 to 2084. [2020-10-29 13:14:18,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2084 states. [2020-10-29 13:14:18,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2084 states to 2084 states and 3083 transitions. [2020-10-29 13:14:18,686 INFO L78 Accepts]: Start accepts. Automaton has 2084 states and 3083 transitions. Word has length 73 [2020-10-29 13:14:18,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:14:18,686 INFO L481 AbstractCegarLoop]: Abstraction has 2084 states and 3083 transitions. [2020-10-29 13:14:18,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:14:18,686 INFO L276 IsEmpty]: Start isEmpty. Operand 2084 states and 3083 transitions. [2020-10-29 13:14:18,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-29 13:14:18,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:14:18,690 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:14:18,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 13:14:18,690 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:14:18,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:14:18,690 INFO L82 PathProgramCache]: Analyzing trace with hash 456464953, now seen corresponding path program 1 times [2020-10-29 13:14:18,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:14:18,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894905689] [2020-10-29 13:14:18,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:14:18,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:18,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:18,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:18,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:18,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:19,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:19,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:19,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:19,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:19,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:19,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:19,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:19,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:19,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:20,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:22,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:22,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:22,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:23,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:23,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-29 13:14:23,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-29 13:14:23,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 13:14:23,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:23,739 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:23,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:14:23,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:14:23,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-29 13:14:23,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:24,121 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:14:24,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:14:24,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:24,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:24,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:24,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:14:24,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:14:24,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 13:14:24,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:24,144 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:24,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:14:24,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:14:24,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:14:24,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:24,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:14:24,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1894905689] [2020-10-29 13:14:24,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:14:24,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:14:24,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543536076] [2020-10-29 13:14:24,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:14:24,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:14:24,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:14:24,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:14:24,167 INFO L87 Difference]: Start difference. First operand 2084 states and 3083 transitions. Second operand 8 states. [2020-10-29 13:14:24,443 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-29 13:14:25,566 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-29 13:14:25,870 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-29 13:14:26,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:14:26,953 INFO L93 Difference]: Finished difference Result 9692 states and 14417 transitions. [2020-10-29 13:14:26,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:14:26,954 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 75 [2020-10-29 13:14:26,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:14:26,968 INFO L225 Difference]: With dead ends: 9692 [2020-10-29 13:14:26,968 INFO L226 Difference]: Without dead ends: 7813 [2020-10-29 13:14:26,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:14:26,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7813 states. [2020-10-29 13:14:27,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7813 to 4248. [2020-10-29 13:14:27,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4248 states. [2020-10-29 13:14:27,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4248 states to 4248 states and 6323 transitions. [2020-10-29 13:14:27,648 INFO L78 Accepts]: Start accepts. Automaton has 4248 states and 6323 transitions. Word has length 75 [2020-10-29 13:14:27,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:14:27,649 INFO L481 AbstractCegarLoop]: Abstraction has 4248 states and 6323 transitions. [2020-10-29 13:14:27,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:14:27,649 INFO L276 IsEmpty]: Start isEmpty. Operand 4248 states and 6323 transitions. [2020-10-29 13:14:27,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-29 13:14:27,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:14:27,653 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:14:27,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 13:14:27,653 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:14:27,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:14:27,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1299715896, now seen corresponding path program 1 times [2020-10-29 13:14:27,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:14:27,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430640912] [2020-10-29 13:14:27,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:14:27,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:27,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:27,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:27,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:27,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:27,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:28,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:28,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:29,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:32,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:32,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-29 13:14:32,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:14:32,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 13:14:32,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:32,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:32,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:14:32,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:14:32,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-29 13:14:32,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:32,994 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:14:32,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:14:32,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:33,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:33,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:33,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:14:33,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:14:33,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 13:14:33,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:33,007 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:33,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:14:33,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:14:33,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:14:33,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:33,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:14:33,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430640912] [2020-10-29 13:14:33,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:14:33,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:14:33,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767667046] [2020-10-29 13:14:33,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:14:33,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:14:33,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:14:33,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:14:33,026 INFO L87 Difference]: Start difference. First operand 4248 states and 6323 transitions. Second operand 6 states. [2020-10-29 13:14:33,352 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-29 13:14:34,368 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-29 13:14:34,740 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-29 13:14:35,036 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-29 13:14:36,111 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-29 13:14:36,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:14:36,723 INFO L93 Difference]: Finished difference Result 16386 states and 24623 transitions. [2020-10-29 13:14:36,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:14:36,723 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 75 [2020-10-29 13:14:36,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:14:36,751 INFO L225 Difference]: With dead ends: 16386 [2020-10-29 13:14:36,751 INFO L226 Difference]: Without dead ends: 12343 [2020-10-29 13:14:36,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-29 13:14:36,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12343 states. [2020-10-29 13:14:37,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12343 to 4248. [2020-10-29 13:14:37,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4248 states. [2020-10-29 13:14:37,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4248 states to 4248 states and 6275 transitions. [2020-10-29 13:14:37,613 INFO L78 Accepts]: Start accepts. Automaton has 4248 states and 6275 transitions. Word has length 75 [2020-10-29 13:14:37,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:14:37,613 INFO L481 AbstractCegarLoop]: Abstraction has 4248 states and 6275 transitions. [2020-10-29 13:14:37,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:14:37,613 INFO L276 IsEmpty]: Start isEmpty. Operand 4248 states and 6275 transitions. [2020-10-29 13:14:37,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-29 13:14:37,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:14:37,618 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:14:37,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 13:14:37,618 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:14:37,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:14:37,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1840696535, now seen corresponding path program 1 times [2020-10-29 13:14:37,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:14:37,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802779323] [2020-10-29 13:14:37,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:14:37,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:37,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:37,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:37,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:37,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:37,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:38,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:38,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:39,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:42,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:42,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-29 13:14:42,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:14:42,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 13:14:42,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:42,644 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:42,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:14:42,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:14:42,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-29 13:14:42,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:42,970 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:14:42,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:14:42,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:42,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:42,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:42,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:14:42,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:14:42,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 13:14:42,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:42,986 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:42,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:14:42,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:14:42,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:14:42,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:43,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:14:43,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [802779323] [2020-10-29 13:14:43,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:14:43,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:14:43,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559227622] [2020-10-29 13:14:43,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:14:43,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:14:43,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:14:43,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:14:43,005 INFO L87 Difference]: Start difference. First operand 4248 states and 6275 transitions. Second operand 5 states. [2020-10-29 13:14:43,345 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-29 13:14:44,567 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-29 13:14:45,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:14:45,426 INFO L93 Difference]: Finished difference Result 11806 states and 17463 transitions. [2020-10-29 13:14:45,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:14:45,426 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 75 [2020-10-29 13:14:45,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:14:45,441 INFO L225 Difference]: With dead ends: 11806 [2020-10-29 13:14:45,442 INFO L226 Difference]: Without dead ends: 7763 [2020-10-29 13:14:45,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:14:45,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7763 states. [2020-10-29 13:14:46,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7763 to 7664. [2020-10-29 13:14:46,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7664 states. [2020-10-29 13:14:46,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7664 states to 7664 states and 11075 transitions. [2020-10-29 13:14:46,769 INFO L78 Accepts]: Start accepts. Automaton has 7664 states and 11075 transitions. Word has length 75 [2020-10-29 13:14:46,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:14:46,769 INFO L481 AbstractCegarLoop]: Abstraction has 7664 states and 11075 transitions. [2020-10-29 13:14:46,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:14:46,769 INFO L276 IsEmpty]: Start isEmpty. Operand 7664 states and 11075 transitions. [2020-10-29 13:14:46,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-29 13:14:46,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:14:46,774 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:14:46,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 13:14:46,774 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:14:46,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:14:46,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1372077875, now seen corresponding path program 1 times [2020-10-29 13:14:46,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:14:46,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [354035109] [2020-10-29 13:14:46,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:14:46,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:46,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:46,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:46,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:46,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:47,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:47,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:47,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:47,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:47,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:51,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:51,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:51,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:51,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:51,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-29 13:14:51,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 13:14:51,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 13:14:51,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:51,808 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:51,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:14:51,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:14:51,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-29 13:14:51,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:52,152 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:14:52,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:14:52,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:52,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:52,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:52,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:14:52,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:14:52,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 13:14:52,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:52,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:52,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:14:52,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:14:52,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:14:52,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:52,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:14:52,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [354035109] [2020-10-29 13:14:52,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:14:52,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:14:52,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381638821] [2020-10-29 13:14:52,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:14:52,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:14:52,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:14:52,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:14:52,179 INFO L87 Difference]: Start difference. First operand 7664 states and 11075 transitions. Second operand 6 states. [2020-10-29 13:14:52,495 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-29 13:14:53,686 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-29 13:14:55,078 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-29 13:14:55,498 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-29 13:14:57,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:14:57,300 INFO L93 Difference]: Finished difference Result 31875 states and 46533 transitions. [2020-10-29 13:14:57,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:14:57,300 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 75 [2020-10-29 13:14:57,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:14:57,355 INFO L225 Difference]: With dead ends: 31875 [2020-10-29 13:14:57,355 INFO L226 Difference]: Without dead ends: 24416 [2020-10-29 13:14:57,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:14:57,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24416 states. [2020-10-29 13:15:00,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24416 to 18536. [2020-10-29 13:15:00,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18536 states. [2020-10-29 13:15:00,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18536 states to 18536 states and 26723 transitions. [2020-10-29 13:15:00,463 INFO L78 Accepts]: Start accepts. Automaton has 18536 states and 26723 transitions. Word has length 75 [2020-10-29 13:15:00,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:15:00,463 INFO L481 AbstractCegarLoop]: Abstraction has 18536 states and 26723 transitions. [2020-10-29 13:15:00,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:15:00,463 INFO L276 IsEmpty]: Start isEmpty. Operand 18536 states and 26723 transitions. [2020-10-29 13:15:00,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-29 13:15:00,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:15:00,469 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:15:00,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 13:15:00,469 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:15:00,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:15:00,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1336112086, now seen corresponding path program 1 times [2020-10-29 13:15:00,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:15:00,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658498495] [2020-10-29 13:15:00,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:15:00,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:00,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:00,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:00,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:00,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:00,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:00,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:01,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:01,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:01,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:01,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:05,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:05,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-29 13:15:05,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 13:15:05,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 13:15:05,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:05,493 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:05,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:15:05,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-29 13:15:05,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-29 13:15:05,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:05,786 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:15:05,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:15:05,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:05,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:05,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:05,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:15:05,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:15:05,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 13:15:05,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:05,798 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:05,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:15:05,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:15:05,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:15:05,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:05,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:15:05,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658498495] [2020-10-29 13:15:05,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:15:05,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:15:05,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752695219] [2020-10-29 13:15:05,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:15:05,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:15:05,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:15:05,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:15:05,813 INFO L87 Difference]: Start difference. First operand 18536 states and 26723 transitions. Second operand 6 states. [2020-10-29 13:15:06,121 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-29 13:15:07,250 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-29 13:15:09,230 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-29 13:15:09,836 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-29 13:15:13,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:15:13,321 INFO L93 Difference]: Finished difference Result 45063 states and 65349 transitions. [2020-10-29 13:15:13,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:15:13,321 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 76 [2020-10-29 13:15:13,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:15:13,385 INFO L225 Difference]: With dead ends: 45063 [2020-10-29 13:15:13,385 INFO L226 Difference]: Without dead ends: 39192 [2020-10-29 13:15:13,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:15:13,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39192 states. [2020-10-29 13:15:17,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39192 to 26328. [2020-10-29 13:15:17,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26328 states. [2020-10-29 13:15:17,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26328 states to 26328 states and 38051 transitions. [2020-10-29 13:15:17,710 INFO L78 Accepts]: Start accepts. Automaton has 26328 states and 38051 transitions. Word has length 76 [2020-10-29 13:15:17,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:15:17,710 INFO L481 AbstractCegarLoop]: Abstraction has 26328 states and 38051 transitions. [2020-10-29 13:15:17,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:15:17,711 INFO L276 IsEmpty]: Start isEmpty. Operand 26328 states and 38051 transitions. [2020-10-29 13:15:17,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-29 13:15:17,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:15:17,716 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:15:17,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 13:15:17,716 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:15:17,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:15:17,717 INFO L82 PathProgramCache]: Analyzing trace with hash 437343142, now seen corresponding path program 1 times [2020-10-29 13:15:17,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:15:17,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [561615874] [2020-10-29 13:15:17,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:15:17,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:17,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:17,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:17,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:17,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:17,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:18,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:18,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:18,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:22,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:22,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-29 13:15:22,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:15:22,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 13:15:22,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:22,747 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:22,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:15:22,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:15:22,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-29 13:15:22,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:23,036 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:15:23,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:15:23,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:23,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:23,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:23,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:15:23,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:15:23,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:15:23,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:23,052 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:23,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:15:23,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:15:23,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:15:23,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:23,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:15:23,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [561615874] [2020-10-29 13:15:23,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:15:23,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:15:23,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824228416] [2020-10-29 13:15:23,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:15:23,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:15:23,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:15:23,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:15:23,068 INFO L87 Difference]: Start difference. First operand 26328 states and 38051 transitions. Second operand 6 states. [2020-10-29 13:15:23,372 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-29 13:15:24,494 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-29 13:15:24,816 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-29 13:15:30,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:15:30,801 INFO L93 Difference]: Finished difference Result 57409 states and 83801 transitions. [2020-10-29 13:15:30,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:15:30,801 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 76 [2020-10-29 13:15:30,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:15:30,873 INFO L225 Difference]: With dead ends: 57409 [2020-10-29 13:15:30,873 INFO L226 Difference]: Without dead ends: 41438 [2020-10-29 13:15:30,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:15:30,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41438 states. [2020-10-29 13:15:37,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41438 to 41048. [2020-10-29 13:15:37,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41048 states. [2020-10-29 13:15:37,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41048 states to 41048 states and 58835 transitions. [2020-10-29 13:15:37,385 INFO L78 Accepts]: Start accepts. Automaton has 41048 states and 58835 transitions. Word has length 76 [2020-10-29 13:15:37,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:15:37,386 INFO L481 AbstractCegarLoop]: Abstraction has 41048 states and 58835 transitions. [2020-10-29 13:15:37,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:15:37,386 INFO L276 IsEmpty]: Start isEmpty. Operand 41048 states and 58835 transitions. [2020-10-29 13:15:37,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-29 13:15:37,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:15:37,391 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:15:37,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 13:15:37,391 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:15:37,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:15:37,391 INFO L82 PathProgramCache]: Analyzing trace with hash 823788739, now seen corresponding path program 1 times [2020-10-29 13:15:37,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:15:37,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1495008249] [2020-10-29 13:15:37,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:15:37,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:37,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:37,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:37,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:37,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:38,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:39,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:42,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:42,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-29 13:15:42,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:15:42,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 13:15:42,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:42,638 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:42,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:15:42,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:15:42,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 13:15:42,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:42,942 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:15:42,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:15:42,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:42,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:42,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:42,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:15:42,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:15:42,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 13:15:42,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:42,969 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:42,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:15:42,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:15:42,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:15:42,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:42,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:15:42,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1495008249] [2020-10-29 13:15:42,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:15:42,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:15:42,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113925069] [2020-10-29 13:15:42,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:15:42,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:15:42,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:15:42,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:15:42,989 INFO L87 Difference]: Start difference. First operand 41048 states and 58835 transitions. Second operand 6 states. [2020-10-29 13:15:43,305 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-29 13:15:44,372 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-29 13:15:48,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:15:48,605 INFO L93 Difference]: Finished difference Result 61342 states and 88143 transitions. [2020-10-29 13:15:48,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:15:48,606 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 76 [2020-10-29 13:15:48,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:15:48,643 INFO L225 Difference]: With dead ends: 61342 [2020-10-29 13:15:48,643 INFO L226 Difference]: Without dead ends: 30567 [2020-10-29 13:15:48,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:15:48,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30567 states. [2020-10-29 13:15:52,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30567 to 20420. [2020-10-29 13:15:52,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20420 states. [2020-10-29 13:15:52,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20420 states to 20420 states and 29182 transitions. [2020-10-29 13:15:52,625 INFO L78 Accepts]: Start accepts. Automaton has 20420 states and 29182 transitions. Word has length 76 [2020-10-29 13:15:52,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:15:52,625 INFO L481 AbstractCegarLoop]: Abstraction has 20420 states and 29182 transitions. [2020-10-29 13:15:52,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:15:52,625 INFO L276 IsEmpty]: Start isEmpty. Operand 20420 states and 29182 transitions. [2020-10-29 13:15:52,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-29 13:15:52,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:15:52,628 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:15:52,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 13:15:52,628 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:15:52,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:15:52,629 INFO L82 PathProgramCache]: Analyzing trace with hash 204994554, now seen corresponding path program 1 times [2020-10-29 13:15:52,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:15:52,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1952292458] [2020-10-29 13:15:52,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:15:52,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:52,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:52,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:52,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:52,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:53,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:53,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:54,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:57,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:57,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-29 13:15:57,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:15:57,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 13:15:57,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:57,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:57,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:15:57,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:15:57,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-29 13:15:57,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:58,002 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:15:58,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:15:58,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:58,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:58,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:58,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:15:58,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:15:58,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 13:15:58,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:58,016 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:58,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:15:58,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:15:58,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:15:58,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:58,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:15:58,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1952292458] [2020-10-29 13:15:58,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:15:58,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:15:58,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340427847] [2020-10-29 13:15:58,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:15:58,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:15:58,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:15:58,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:15:58,031 INFO L87 Difference]: Start difference. First operand 20420 states and 29182 transitions. Second operand 8 states. [2020-10-29 13:15:58,377 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-29 13:15:59,612 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-29 13:16:05,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:16:05,254 INFO L93 Difference]: Finished difference Result 50876 states and 72632 transitions. [2020-10-29 13:16:05,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 13:16:05,255 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 77 [2020-10-29 13:16:05,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:16:05,296 INFO L225 Difference]: With dead ends: 50876 [2020-10-29 13:16:05,296 INFO L226 Difference]: Without dead ends: 30567 [2020-10-29 13:16:05,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-10-29 13:16:05,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30567 states. [2020-10-29 13:16:09,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30567 to 20420. [2020-10-29 13:16:09,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20420 states. [2020-10-29 13:16:09,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20420 states to 20420 states and 29179 transitions. [2020-10-29 13:16:09,240 INFO L78 Accepts]: Start accepts. Automaton has 20420 states and 29179 transitions. Word has length 77 [2020-10-29 13:16:09,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:16:09,240 INFO L481 AbstractCegarLoop]: Abstraction has 20420 states and 29179 transitions. [2020-10-29 13:16:09,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:16:09,240 INFO L276 IsEmpty]: Start isEmpty. Operand 20420 states and 29179 transitions. [2020-10-29 13:16:09,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-29 13:16:09,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:16:09,243 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:16:09,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 13:16:09,243 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:16:09,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:16:09,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1690052051, now seen corresponding path program 1 times [2020-10-29 13:16:09,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:16:09,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [772007960] [2020-10-29 13:16:09,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:16:09,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:09,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:09,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:09,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:09,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:10,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:10,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-29 13:16:10,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:16:10,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1249 [2020-10-29 13:16:10,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:10,514 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:10,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:16:10,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-29 13:16:10,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 13:16:10,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:10,796 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:16:10,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:16:10,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:10,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:10,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:10,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:16:10,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:16:10,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:16:10,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:10,811 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:10,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:16:10,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:16:10,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:16:10,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:10,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:16:10,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [772007960] [2020-10-29 13:16:10,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:16:10,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:16:10,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649583014] [2020-10-29 13:16:10,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:16:10,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:16:10,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:16:10,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:16:10,827 INFO L87 Difference]: Start difference. First operand 20420 states and 29179 transitions. Second operand 4 states. [2020-10-29 13:16:11,100 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-29 13:16:15,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:16:15,432 INFO L93 Difference]: Finished difference Result 38866 states and 55319 transitions. [2020-10-29 13:16:15,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:16:15,433 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 79 [2020-10-29 13:16:15,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:16:15,456 INFO L225 Difference]: With dead ends: 38866 [2020-10-29 13:16:15,457 INFO L226 Difference]: Without dead ends: 18575 [2020-10-29 13:16:15,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:16:15,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18575 states. [2020-10-29 13:16:19,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18575 to 18572. [2020-10-29 13:16:19,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18572 states. [2020-10-29 13:16:19,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18572 states to 18572 states and 26011 transitions. [2020-10-29 13:16:19,242 INFO L78 Accepts]: Start accepts. Automaton has 18572 states and 26011 transitions. Word has length 79 [2020-10-29 13:16:19,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:16:19,242 INFO L481 AbstractCegarLoop]: Abstraction has 18572 states and 26011 transitions. [2020-10-29 13:16:19,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:16:19,242 INFO L276 IsEmpty]: Start isEmpty. Operand 18572 states and 26011 transitions. [2020-10-29 13:16:19,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-29 13:16:19,244 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:16:19,244 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:16:19,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 13:16:19,244 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:16:19,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:16:19,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1678371552, now seen corresponding path program 1 times [2020-10-29 13:16:19,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:16:19,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1247260682] [2020-10-29 13:16:19,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:16:19,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:19,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:19,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:19,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:19,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:19,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 13:16:19,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:16:19,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 651 [2020-10-29 13:16:19,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:19,918 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:19,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:16:19,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-29 13:16:19,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 13:16:19,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:20,204 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:16:20,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:16:20,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:20,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:20,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:20,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:16:20,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:16:20,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 13:16:20,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:20,217 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:20,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:16:20,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:16:20,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:16:20,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:20,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:16:20,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1247260682] [2020-10-29 13:16:20,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:16:20,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:16:20,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771735452] [2020-10-29 13:16:20,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:16:20,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:16:20,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:16:20,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:16:20,230 INFO L87 Difference]: Start difference. First operand 18572 states and 26011 transitions. Second operand 4 states. [2020-10-29 13:16:20,523 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 167