/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.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:29:13,547 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:29:13,550 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:29:13,584 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:29:13,585 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:29:13,586 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:29:13,588 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:29:13,590 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:29:13,592 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:29:13,594 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:29:13,595 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:29:13,596 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:29:13,597 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:29:13,598 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:29:13,599 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:29:13,601 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:29:13,602 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:29:13,603 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:29:13,605 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:29:13,608 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:29:13,610 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:29:13,612 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:29:13,613 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:29:13,614 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:29:13,633 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:29:13,633 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:29:13,634 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:29:13,635 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:29:13,636 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:29:13,637 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:29:13,638 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:29:13,639 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:29:13,640 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:29:13,641 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:29:13,643 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:29:13,643 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:29:13,644 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:29:13,645 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:29:13,645 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:29:13,646 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:29:13,647 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:29:13,649 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 13:29:13,689 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:29:13,689 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:29:13,691 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:29:13,691 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:29:13,692 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:29:13,692 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:29:13,692 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:29:13,692 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:29:13,693 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:29:13,693 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:29:13,693 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:29:13,693 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:29:13,694 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:29:13,694 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:29:13,694 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:29:13,694 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:29:13,694 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:29:13,695 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:29:13,695 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:29:13,695 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:29:13,695 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:29:13,696 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:29:13,696 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:29:13,696 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:29:13,696 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:29:13,697 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:29:13,697 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:29:13,697 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:29:13,697 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:29:13,697 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:29:14,080 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:29:14,120 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:29:14,124 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:29:14,126 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:29:14,127 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:29:14,128 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-29 13:29:14,225 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0ae0546cf/03d4da436a484c8c8c365d29a3fbff51/FLAG6f014be02 [2020-10-29 13:29:14,868 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:29:14,869 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-29 13:29:14,880 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0ae0546cf/03d4da436a484c8c8c365d29a3fbff51/FLAG6f014be02 [2020-10-29 13:29:15,218 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0ae0546cf/03d4da436a484c8c8c365d29a3fbff51 [2020-10-29 13:29:15,224 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:29:15,231 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:29:15,235 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:29:15,236 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:29:15,239 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:29:15,240 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:29:15" (1/1) ... [2020-10-29 13:29:15,244 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76a75650 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:29:15, skipping insertion in model container [2020-10-29 13:29:15,244 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:29:15" (1/1) ... [2020-10-29 13:29:15,252 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:29:15,297 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:29:15,632 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:29:15,659 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:29:15,739 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:29:15,770 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:29:15,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:29:15 WrapperNode [2020-10-29 13:29:15,771 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:29:15,772 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:29:15,773 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:29:15,773 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:29:15,793 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:29:15" (1/1) ... [2020-10-29 13:29:15,794 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:29:15" (1/1) ... [2020-10-29 13:29:15,807 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:29:15" (1/1) ... [2020-10-29 13:29:15,808 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:29:15" (1/1) ... [2020-10-29 13:29:15,825 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:29:15" (1/1) ... [2020-10-29 13:29:15,836 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:29:15" (1/1) ... [2020-10-29 13:29:15,840 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:29:15" (1/1) ... [2020-10-29 13:29:15,856 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:29:15,858 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:29:15,858 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:29:15,858 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:29:15,861 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:29:15" (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 13:29:15,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:29:15,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:29:15,966 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:29:15,966 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:29:15,966 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:29:15,967 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:29:15,967 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:29:15,968 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:29:15,968 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:29:15,968 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:29:15,969 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:29:15,969 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-29 13:29:15,969 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:29:15,970 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:29:15,970 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:29:15,971 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:29:15,971 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:29:15,971 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:29:15,972 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:29:15,972 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-29 13:29:15,972 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-29 13:29:15,972 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-29 13:29:15,972 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:29:15,972 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:29:15,973 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:29:15,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:29:15,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:29:15,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:29:15,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:29:15,973 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:29:15,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:29:16,950 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:29:16,950 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:29:16,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:29:16 BoogieIcfgContainer [2020-10-29 13:29:16,952 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:29:16,954 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:29:16,954 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:29:16,958 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:29:16,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:29:15" (1/3) ... [2020-10-29 13:29:16,959 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bf5d2fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:29:16, skipping insertion in model container [2020-10-29 13:29:16,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:29:15" (2/3) ... [2020-10-29 13:29:16,960 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bf5d2fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:29:16, skipping insertion in model container [2020-10-29 13:29:16,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:29:16" (3/3) ... [2020-10-29 13:29:16,961 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-29 13:29:16,973 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:29:16,979 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:29:16,994 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:29:17,021 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:29:17,021 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:29:17,022 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:29:17,022 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:29:17,022 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:29:17,022 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:29:17,022 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:29:17,022 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:29:17,045 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states. [2020-10-29 13:29:17,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-29 13:29:17,055 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:29:17,056 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] [2020-10-29 13:29:17,057 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:29:17,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:29:17,064 INFO L82 PathProgramCache]: Analyzing trace with hash 2080328782, now seen corresponding path program 1 times [2020-10-29 13:29:17,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:29:17,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1443701514] [2020-10-29 13:29:17,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:29:17,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:29:17,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:17,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:17,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:18,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:18,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:19,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:22,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:29:22,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-29 13:29:22,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:29:22,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-29 13:29:22,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:29:22,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:29:22,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:29:22,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:29:22,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-29 13:29:22,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 13:29:23,020 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:29:23,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:29:23,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:29:23,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:23,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:29:23,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:29:23,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:29:23,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-29 13:29:23,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:29:23,081 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:29:23,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:29:23,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:29:23,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:29:23,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:29:23,138 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 13:29:23,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1443701514] [2020-10-29 13:29:23,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:29:23,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:29:23,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944591950] [2020-10-29 13:29:23,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:29:23,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:29:23,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:29:23,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:29:23,165 INFO L87 Difference]: Start difference. First operand 127 states. Second operand 9 states. [2020-10-29 13:29:23,762 WARN L193 SmtUtils]: Spent 433.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-29 13:29:25,308 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-29 13:29:25,670 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-29 13:29:26,089 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-29 13:29:26,451 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-29 13:29:26,795 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-29 13:29:27,240 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-29 13:29:27,627 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-29 13:29:27,984 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-29 13:29:28,326 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-29 13:29:28,648 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-29 13:29:28,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:29:28,793 INFO L93 Difference]: Finished difference Result 1031 states and 1635 transitions. [2020-10-29 13:29:28,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 13:29:28,795 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 78 [2020-10-29 13:29:28,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:29:28,822 INFO L225 Difference]: With dead ends: 1031 [2020-10-29 13:29:28,822 INFO L226 Difference]: Without dead ends: 923 [2020-10-29 13:29:28,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=237, Invalid=575, Unknown=0, NotChecked=0, Total=812 [2020-10-29 13:29:28,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2020-10-29 13:29:28,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 190. [2020-10-29 13:29:28,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-10-29 13:29:28,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 273 transitions. [2020-10-29 13:29:28,928 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 273 transitions. Word has length 78 [2020-10-29 13:29:28,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:29:28,929 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 273 transitions. [2020-10-29 13:29:28,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:29:28,929 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 273 transitions. [2020-10-29 13:29:28,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-29 13:29:28,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:29:28,933 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 13:29:28,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:29:28,934 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:29:28,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:29:28,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1787172879, now seen corresponding path program 1 times [2020-10-29 13:29:28,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:29:28,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [714631295] [2020-10-29 13:29:28,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:29:28,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:29:28,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:29,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:29,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:29,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:29,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:30,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:30,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:33,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:29:33,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 13:29:33,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:29:33,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 13:29:33,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:29:33,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:29:33,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:29:33,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:29:33,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-29 13:29:33,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:29:34,496 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:29:34,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:29:34,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:29:34,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:34,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:29:34,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:29:34,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:29:34,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-29 13:29:34,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:29:34,552 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:29:34,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:29:34,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:29:34,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:29:34,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:29:34,617 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 13:29:34,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [714631295] [2020-10-29 13:29:34,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:29:34,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:29:34,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888525731] [2020-10-29 13:29:34,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:29:34,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:29:34,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:29:34,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:29:34,622 INFO L87 Difference]: Start difference. First operand 190 states and 273 transitions. Second operand 7 states. [2020-10-29 13:29:34,972 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-29 13:29:35,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:29:35,823 INFO L93 Difference]: Finished difference Result 567 states and 868 transitions. [2020-10-29 13:29:35,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:29:35,824 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 80 [2020-10-29 13:29:35,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:29:35,829 INFO L225 Difference]: With dead ends: 567 [2020-10-29 13:29:35,829 INFO L226 Difference]: Without dead ends: 424 [2020-10-29 13:29:35,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:29:35,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2020-10-29 13:29:35,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 229. [2020-10-29 13:29:35,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-29 13:29:35,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 333 transitions. [2020-10-29 13:29:35,867 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 333 transitions. Word has length 80 [2020-10-29 13:29:35,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:29:35,868 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 333 transitions. [2020-10-29 13:29:35,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:29:35,868 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 333 transitions. [2020-10-29 13:29:35,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-29 13:29:35,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:29:35,871 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 13:29:35,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:29:35,871 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:29:35,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:29:35,872 INFO L82 PathProgramCache]: Analyzing trace with hash 340226173, now seen corresponding path program 1 times [2020-10-29 13:29:35,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:29:35,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [474754897] [2020-10-29 13:29:35,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:29:35,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:29:35,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:35,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:35,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:36,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:36,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:36,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:36,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:39,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:40,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:29:40,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 13:29:40,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:29:40,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-29 13:29:40,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:29:40,924 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:29:40,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:29:40,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:29:40,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-29 13:29:40,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:29:41,375 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:29:41,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:29:41,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:29:41,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:41,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:29:41,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:29:41,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:29:41,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-29 13:29:41,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:29:41,413 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:29:41,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:29:41,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:29:41,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:29:41,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:29:41,461 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 13:29:41,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [474754897] [2020-10-29 13:29:41,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:29:41,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:29:41,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428899659] [2020-10-29 13:29:41,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:29:41,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:29:41,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:29:41,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:29:41,464 INFO L87 Difference]: Start difference. First operand 229 states and 333 transitions. Second operand 7 states. [2020-10-29 13:29:41,821 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-29 13:29:42,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:29:42,839 INFO L93 Difference]: Finished difference Result 563 states and 858 transitions. [2020-10-29 13:29:42,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:29:42,843 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 80 [2020-10-29 13:29:42,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:29:42,849 INFO L225 Difference]: With dead ends: 563 [2020-10-29 13:29:42,849 INFO L226 Difference]: Without dead ends: 420 [2020-10-29 13:29:42,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:29:42,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2020-10-29 13:29:42,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 285. [2020-10-29 13:29:42,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2020-10-29 13:29:42,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 419 transitions. [2020-10-29 13:29:42,916 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 419 transitions. Word has length 80 [2020-10-29 13:29:42,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:29:42,925 INFO L481 AbstractCegarLoop]: Abstraction has 285 states and 419 transitions. [2020-10-29 13:29:42,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:29:42,925 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 419 transitions. [2020-10-29 13:29:42,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-29 13:29:42,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:29:42,936 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 13:29:42,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:29:42,936 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:29:42,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:29:42,937 INFO L82 PathProgramCache]: Analyzing trace with hash 110313555, now seen corresponding path program 1 times [2020-10-29 13:29:42,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:29:42,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2111065504] [2020-10-29 13:29:42,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:29:42,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:29:42,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:43,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:43,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:43,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:43,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:44,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:44,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:44,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:47,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:29:47,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 13:29:47,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:29:47,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4778 [2020-10-29 13:29:47,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:29:47,750 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:29:47,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:29:47,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:29:47,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-29 13:29:47,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:29:48,219 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:29:48,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:29:48,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:29:48,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:48,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:29:48,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:29:48,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:29:48,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-29 13:29:48,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:29:48,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:29:48,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:29:48,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:29:48,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:29:48,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:29:48,288 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 13:29:48,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2111065504] [2020-10-29 13:29:48,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:29:48,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:29:48,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834536653] [2020-10-29 13:29:48,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:29:48,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:29:48,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:29:48,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:29:48,294 INFO L87 Difference]: Start difference. First operand 285 states and 419 transitions. Second operand 4 states. [2020-10-29 13:29:48,647 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-29 13:29:49,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:29:49,175 INFO L93 Difference]: Finished difference Result 721 states and 1098 transitions. [2020-10-29 13:29:49,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:29:49,176 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-10-29 13:29:49,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:29:49,180 INFO L225 Difference]: With dead ends: 721 [2020-10-29 13:29:49,180 INFO L226 Difference]: Without dead ends: 490 [2020-10-29 13:29:49,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:29:49,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2020-10-29 13:29:49,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 485. [2020-10-29 13:29:49,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 485 states. [2020-10-29 13:29:49,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 727 transitions. [2020-10-29 13:29:49,244 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 727 transitions. Word has length 80 [2020-10-29 13:29:49,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:29:49,246 INFO L481 AbstractCegarLoop]: Abstraction has 485 states and 727 transitions. [2020-10-29 13:29:49,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:29:49,246 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 727 transitions. [2020-10-29 13:29:49,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-29 13:29:49,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:29:49,252 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 13:29:49,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:29:49,252 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:29:49,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:29:49,253 INFO L82 PathProgramCache]: Analyzing trace with hash 731843188, now seen corresponding path program 1 times [2020-10-29 13:29:49,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:29:49,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643466029] [2020-10-29 13:29:49,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:29:49,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:29:49,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:49,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:49,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:49,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:49,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:50,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:54,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:29:54,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 13:29:54,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:29:54,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-29 13:29:54,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:29:54,299 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:29:54,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:29:54,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:29:54,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-29 13:29:54,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:29:54,766 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:29:54,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:29:54,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:29:54,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:54,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:29:54,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:29:54,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:29:54,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 13:29:54,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:29:54,791 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:29:54,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:29:54,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:29:54,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:29:54,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:29:54,829 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 13:29:54,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643466029] [2020-10-29 13:29:54,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:29:54,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:29:54,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896036708] [2020-10-29 13:29:54,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:29:54,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:29:54,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:29:54,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:29:54,835 INFO L87 Difference]: Start difference. First operand 485 states and 727 transitions. Second operand 9 states. [2020-10-29 13:29:55,282 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-29 13:29:56,526 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-29 13:29:56,890 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-29 13:29:57,223 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-29 13:29:57,737 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-29 13:29:58,141 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-29 13:29:58,506 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-29 13:29:58,845 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-29 13:29:59,466 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-29 13:29:59,890 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-29 13:30:00,288 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-29 13:30:00,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:30:00,344 INFO L93 Difference]: Finished difference Result 2064 states and 3185 transitions. [2020-10-29 13:30:00,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 13:30:00,344 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 80 [2020-10-29 13:30:00,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:30:00,355 INFO L225 Difference]: With dead ends: 2064 [2020-10-29 13:30:00,355 INFO L226 Difference]: Without dead ends: 1794 [2020-10-29 13:30:00,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=237, Invalid=575, Unknown=0, NotChecked=0, Total=812 [2020-10-29 13:30:00,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1794 states. [2020-10-29 13:30:00,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1794 to 485. [2020-10-29 13:30:00,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 485 states. [2020-10-29 13:30:00,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 725 transitions. [2020-10-29 13:30:00,457 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 725 transitions. Word has length 80 [2020-10-29 13:30:00,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:30:00,458 INFO L481 AbstractCegarLoop]: Abstraction has 485 states and 725 transitions. [2020-10-29 13:30:00,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:30:00,458 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 725 transitions. [2020-10-29 13:30:00,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-29 13:30:00,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:30:00,460 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 13:30:00,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:30:00,460 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:30:00,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:30:00,461 INFO L82 PathProgramCache]: Analyzing trace with hash -395875709, now seen corresponding path program 1 times [2020-10-29 13:30:00,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:30:00,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1644402920] [2020-10-29 13:30:00,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:30:00,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:30:00,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:00,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:00,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:00,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:00,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:01,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:01,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:03,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:05,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:30:05,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 13:30:05,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:30:05,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 13:30:05,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:30:05,499 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:30:05,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:30:05,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:30:05,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-29 13:30:05,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:30:05,908 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:30:05,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:30:05,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:30:05,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:05,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:30:05,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:30:05,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:30:05,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-29 13:30:05,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:30:05,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:30:05,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:30:05,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:30:05,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:30:05,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:30:06,017 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 13:30:06,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1644402920] [2020-10-29 13:30:06,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:30:06,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:30:06,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932529729] [2020-10-29 13:30:06,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:30:06,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:30:06,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:30:06,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:30:06,020 INFO L87 Difference]: Start difference. First operand 485 states and 725 transitions. Second operand 7 states. [2020-10-29 13:30:06,362 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-29 13:30:07,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:30:07,325 INFO L93 Difference]: Finished difference Result 1051 states and 1600 transitions. [2020-10-29 13:30:07,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:30:07,326 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 80 [2020-10-29 13:30:07,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:30:07,332 INFO L225 Difference]: With dead ends: 1051 [2020-10-29 13:30:07,332 INFO L226 Difference]: Without dead ends: 757 [2020-10-29 13:30:07,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:30:07,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2020-10-29 13:30:07,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 477. [2020-10-29 13:30:07,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 477 states. [2020-10-29 13:30:07,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 705 transitions. [2020-10-29 13:30:07,418 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 705 transitions. Word has length 80 [2020-10-29 13:30:07,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:30:07,419 INFO L481 AbstractCegarLoop]: Abstraction has 477 states and 705 transitions. [2020-10-29 13:30:07,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:30:07,419 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 705 transitions. [2020-10-29 13:30:07,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-29 13:30:07,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:30:07,420 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 13:30:07,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:30:07,421 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:30:07,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:30:07,421 INFO L82 PathProgramCache]: Analyzing trace with hash 940723465, now seen corresponding path program 1 times [2020-10-29 13:30:07,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:30:07,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600041358] [2020-10-29 13:30:07,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:30:07,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:30:07,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:07,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:07,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:07,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:07,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:08,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:08,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:10,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:12,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:30:12,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 13:30:12,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:30:12,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 13:30:12,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:30:12,448 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:30:12,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:30:12,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:30:12,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-29 13:30:12,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:30:12,846 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:30:12,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:30:12,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:30:12,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:12,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:30:12,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:30:12,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:30:12,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-29 13:30:12,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:30:12,888 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:30:12,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:30:12,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:30:12,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:30:12,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:30:12,929 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 13:30:12,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600041358] [2020-10-29 13:30:12,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:30:12,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:30:12,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909328865] [2020-10-29 13:30:12,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:30:12,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:30:12,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:30:12,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:30:12,932 INFO L87 Difference]: Start difference. First operand 477 states and 705 transitions. Second operand 7 states. [2020-10-29 13:30:13,278 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-29 13:30:14,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:30:14,266 INFO L93 Difference]: Finished difference Result 1115 states and 1688 transitions. [2020-10-29 13:30:14,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:30:14,267 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 80 [2020-10-29 13:30:14,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:30:14,273 INFO L225 Difference]: With dead ends: 1115 [2020-10-29 13:30:14,274 INFO L226 Difference]: Without dead ends: 789 [2020-10-29 13:30:14,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:30:14,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2020-10-29 13:30:14,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 469. [2020-10-29 13:30:14,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469 states. [2020-10-29 13:30:14,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 685 transitions. [2020-10-29 13:30:14,351 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 685 transitions. Word has length 80 [2020-10-29 13:30:14,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:30:14,352 INFO L481 AbstractCegarLoop]: Abstraction has 469 states and 685 transitions. [2020-10-29 13:30:14,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:30:14,352 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 685 transitions. [2020-10-29 13:30:14,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-29 13:30:14,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:30:14,353 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 13:30:14,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:30:14,354 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:30:14,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:30:14,354 INFO L82 PathProgramCache]: Analyzing trace with hash 987810709, now seen corresponding path program 1 times [2020-10-29 13:30:14,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:30:14,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1769324914] [2020-10-29 13:30:14,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:30:14,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:30:14,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:14,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:14,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:14,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:14,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:15,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:15,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:16,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:19,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:30:19,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 13:30:19,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:30:19,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 13:30:19,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:30:19,393 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:30:19,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:30:19,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:30:19,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-29 13:30:19,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:30:19,721 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:30:19,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:30:19,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:30:19,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:19,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:30:19,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:30:19,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:30:19,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-29 13:30:19,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:30:19,755 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:30:19,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:30:19,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:30:19,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:30:19,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:30:19,778 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 13:30:19,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1769324914] [2020-10-29 13:30:19,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:30:19,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:30:19,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722234085] [2020-10-29 13:30:19,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:30:19,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:30:19,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:30:19,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:30:19,781 INFO L87 Difference]: Start difference. First operand 469 states and 685 transitions. Second operand 7 states. [2020-10-29 13:30:20,116 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-29 13:30:21,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:30:21,004 INFO L93 Difference]: Finished difference Result 1077 states and 1631 transitions. [2020-10-29 13:30:21,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:30:21,004 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 80 [2020-10-29 13:30:21,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:30:21,008 INFO L225 Difference]: With dead ends: 1077 [2020-10-29 13:30:21,009 INFO L226 Difference]: Without dead ends: 751 [2020-10-29 13:30:21,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-29 13:30:21,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2020-10-29 13:30:21,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 441. [2020-10-29 13:30:21,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2020-10-29 13:30:21,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 644 transitions. [2020-10-29 13:30:21,080 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 644 transitions. Word has length 80 [2020-10-29 13:30:21,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:30:21,081 INFO L481 AbstractCegarLoop]: Abstraction has 441 states and 644 transitions. [2020-10-29 13:30:21,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:30:21,081 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 644 transitions. [2020-10-29 13:30:21,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-29 13:30:21,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:30:21,082 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, 1] [2020-10-29 13:30:21,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:30:21,082 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:30:21,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:30:21,083 INFO L82 PathProgramCache]: Analyzing trace with hash 184497353, now seen corresponding path program 1 times [2020-10-29 13:30:21,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:30:21,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1099791260] [2020-10-29 13:30:21,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:30:21,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:30:21,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:21,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:21,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:21,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:21,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:21,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:22,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:22,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:26,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:30:26,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-29 13:30:26,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:30:26,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 13:30:26,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:30:26,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:30:26,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:30:26,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 13:30:26,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 13:30:26,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:30:26,395 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:30:26,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:30:26,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:30:26,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:26,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:30:26,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:30:26,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:30:26,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:30:26,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:30:26,411 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:30:26,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:30:26,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:30:26,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:30:26,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:30:26,427 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 13:30:26,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1099791260] [2020-10-29 13:30:26,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:30:26,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:30:26,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397084508] [2020-10-29 13:30:26,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:30:26,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:30:26,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:30:26,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:30:26,429 INFO L87 Difference]: Start difference. First operand 441 states and 644 transitions. Second operand 4 states. [2020-10-29 13:30:26,734 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-29 13:30:27,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:30:27,495 INFO L93 Difference]: Finished difference Result 707 states and 1062 transitions. [2020-10-29 13:30:27,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:30:27,496 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-29 13:30:27,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:30:27,499 INFO L225 Difference]: With dead ends: 707 [2020-10-29 13:30:27,499 INFO L226 Difference]: Without dead ends: 483 [2020-10-29 13:30:27,500 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 13:30:27,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2020-10-29 13:30:27,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 480. [2020-10-29 13:30:27,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 480 states. [2020-10-29 13:30:27,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 718 transitions. [2020-10-29 13:30:27,577 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 718 transitions. Word has length 81 [2020-10-29 13:30:27,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:30:27,577 INFO L481 AbstractCegarLoop]: Abstraction has 480 states and 718 transitions. [2020-10-29 13:30:27,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:30:27,578 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 718 transitions. [2020-10-29 13:30:27,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-29 13:30:27,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:30:27,579 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, 1] [2020-10-29 13:30:27,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:30:27,579 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:30:27,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:30:27,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1152902597, now seen corresponding path program 1 times [2020-10-29 13:30:27,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:30:27,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [607603530] [2020-10-29 13:30:27,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:30:27,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:30:27,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:27,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:27,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:27,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:27,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:28,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:29,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:30:29,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-29 13:30:29,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:30:29,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2236 [2020-10-29 13:30:29,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:30:29,839 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:30:29,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:30:29,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-29 13:30:29,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 13:30:29,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:30:30,126 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:30:30,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:30:30,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:30:30,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:30,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:30:30,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:30:30,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:30:30,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 13:30:30,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:30:30,141 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:30:30,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:30:30,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:30:30,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:30:30,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:30:30,159 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 13:30:30,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [607603530] [2020-10-29 13:30:30,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:30:30,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:30:30,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860415232] [2020-10-29 13:30:30,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:30:30,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:30:30,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:30:30,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:30:30,161 INFO L87 Difference]: Start difference. First operand 480 states and 718 transitions. Second operand 4 states. [2020-10-29 13:30:30,480 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-29 13:30:31,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:30:31,148 INFO L93 Difference]: Finished difference Result 1212 states and 1862 transitions. [2020-10-29 13:30:31,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:30:31,149 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-29 13:30:31,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:30:31,153 INFO L225 Difference]: With dead ends: 1212 [2020-10-29 13:30:31,154 INFO L226 Difference]: Without dead ends: 821 [2020-10-29 13:30:31,155 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 13:30:31,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2020-10-29 13:30:31,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 811. [2020-10-29 13:30:31,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 811 states. [2020-10-29 13:30:31,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 1232 transitions. [2020-10-29 13:30:31,289 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 1232 transitions. Word has length 81 [2020-10-29 13:30:31,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:30:31,289 INFO L481 AbstractCegarLoop]: Abstraction has 811 states and 1232 transitions. [2020-10-29 13:30:31,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:30:31,289 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 1232 transitions. [2020-10-29 13:30:31,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-29 13:30:31,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:30:31,290 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, 1, 1] [2020-10-29 13:30:31,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 13:30:31,291 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:30:31,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:30:31,291 INFO L82 PathProgramCache]: Analyzing trace with hash 651488386, now seen corresponding path program 1 times [2020-10-29 13:30:31,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:30:31,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760895647] [2020-10-29 13:30:31,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:30:31,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:30:31,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:31,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:31,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:31,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:31,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:32,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:30:32,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-29 13:30:32,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:30:32,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1220 [2020-10-29 13:30:32,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:30:32,535 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:30:32,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:30:32,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-29 13:30:32,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 13:30:32,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:30:32,854 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:30:32,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:30:32,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:30:32,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:32,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:30:32,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:30:32,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:30:32,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:30:32,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:30:32,873 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:30:32,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:30:32,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:30:32,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:30:32,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:30:32,895 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 13:30:32,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1760895647] [2020-10-29 13:30:32,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:30:32,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:30:32,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466709027] [2020-10-29 13:30:32,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:30:32,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:30:32,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:30:32,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:30:32,898 INFO L87 Difference]: Start difference. First operand 811 states and 1232 transitions. Second operand 4 states. [2020-10-29 13:30:33,243 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-29 13:30:34,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:30:34,061 INFO L93 Difference]: Finished difference Result 2173 states and 3348 transitions. [2020-10-29 13:30:34,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:30:34,061 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2020-10-29 13:30:34,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:30:34,069 INFO L225 Difference]: With dead ends: 2173 [2020-10-29 13:30:34,069 INFO L226 Difference]: Without dead ends: 1443 [2020-10-29 13:30:34,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:30:34,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2020-10-29 13:30:34,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 1433. [2020-10-29 13:30:34,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1433 states. [2020-10-29 13:30:34,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1433 states to 1433 states and 2187 transitions. [2020-10-29 13:30:34,376 INFO L78 Accepts]: Start accepts. Automaton has 1433 states and 2187 transitions. Word has length 82 [2020-10-29 13:30:34,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:30:34,377 INFO L481 AbstractCegarLoop]: Abstraction has 1433 states and 2187 transitions. [2020-10-29 13:30:34,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:30:34,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1433 states and 2187 transitions. [2020-10-29 13:30:34,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-29 13:30:34,378 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:30:34,378 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, 1, 1, 1] [2020-10-29 13:30:34,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 13:30:34,378 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:30:34,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:30:34,379 INFO L82 PathProgramCache]: Analyzing trace with hash -191176797, now seen corresponding path program 1 times [2020-10-29 13:30:34,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:30:34,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1129107703] [2020-10-29 13:30:34,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:30:34,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:30:34,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:34,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:34,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:34,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:35,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:36,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:30:36,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-29 13:30:36,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:30:36,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2408 [2020-10-29 13:30:36,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:30:36,810 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:30:36,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:30:36,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:30:36,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-29 13:30:36,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 13:30:37,153 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:30:37,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:30:37,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:30:37,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:37,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:30:37,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:30:37,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:30:37,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 13:30:37,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:30:37,180 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:30:37,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:30:37,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:30:37,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:30:37,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:30:37,199 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 13:30:37,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1129107703] [2020-10-29 13:30:37,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:30:37,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:30:37,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661995383] [2020-10-29 13:30:37,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:30:37,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:30:37,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:30:37,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:30:37,201 INFO L87 Difference]: Start difference. First operand 1433 states and 2187 transitions. Second operand 6 states. [2020-10-29 13:30:37,524 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-29 13:30:38,366 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-29 13:30:38,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:30:38,779 INFO L93 Difference]: Finished difference Result 4139 states and 6367 transitions. [2020-10-29 13:30:38,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:30:38,779 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-10-29 13:30:38,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:30:38,791 INFO L225 Difference]: With dead ends: 4139 [2020-10-29 13:30:38,791 INFO L226 Difference]: Without dead ends: 2780 [2020-10-29 13:30:38,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:30:38,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2780 states. [2020-10-29 13:30:39,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2780 to 2777. [2020-10-29 13:30:39,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2777 states. [2020-10-29 13:30:39,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2777 states to 2777 states and 4251 transitions. [2020-10-29 13:30:39,259 INFO L78 Accepts]: Start accepts. Automaton has 2777 states and 4251 transitions. Word has length 83 [2020-10-29 13:30:39,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:30:39,260 INFO L481 AbstractCegarLoop]: Abstraction has 2777 states and 4251 transitions. [2020-10-29 13:30:39,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:30:39,260 INFO L276 IsEmpty]: Start isEmpty. Operand 2777 states and 4251 transitions. [2020-10-29 13:30:39,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-29 13:30:39,261 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:30:39,261 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, 1, 1, 1] [2020-10-29 13:30:39,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 13:30:39,261 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:30:39,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:30:39,262 INFO L82 PathProgramCache]: Analyzing trace with hash 870523486, now seen corresponding path program 1 times [2020-10-29 13:30:39,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:30:39,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1538116469] [2020-10-29 13:30:39,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:30:39,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:30:39,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:39,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:39,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:39,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:40,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:30:40,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-29 13:30:40,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:30:40,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 729 [2020-10-29 13:30:40,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:30:40,038 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:30:40,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:30:40,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-29 13:30:40,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 13:30:40,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:30:40,322 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:30:40,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:30:40,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:30:40,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:40,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:30:40,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:30:40,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:30:40,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:30:40,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:30:40,340 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:30:40,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:30:40,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:30:40,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:30:40,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:30:40,361 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 13:30:40,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1538116469] [2020-10-29 13:30:40,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:30:40,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:30:40,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221484554] [2020-10-29 13:30:40,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:30:40,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:30:40,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:30:40,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:30:40,363 INFO L87 Difference]: Start difference. First operand 2777 states and 4251 transitions. Second operand 4 states. [2020-10-29 13:30:40,677 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-29 13:30:41,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:30:41,905 INFO L93 Difference]: Finished difference Result 7802 states and 11963 transitions. [2020-10-29 13:30:41,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:30:41,905 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-10-29 13:30:41,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:30:41,927 INFO L225 Difference]: With dead ends: 7802 [2020-10-29 13:30:41,928 INFO L226 Difference]: Without dead ends: 5094 [2020-10-29 13:30:41,933 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 13:30:41,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5094 states. [2020-10-29 13:30:42,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5094 to 5091. [2020-10-29 13:30:42,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5091 states. [2020-10-29 13:30:42,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5091 states to 5091 states and 7740 transitions. [2020-10-29 13:30:42,613 INFO L78 Accepts]: Start accepts. Automaton has 5091 states and 7740 transitions. Word has length 83 [2020-10-29 13:30:42,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:30:42,613 INFO L481 AbstractCegarLoop]: Abstraction has 5091 states and 7740 transitions. [2020-10-29 13:30:42,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:30:42,614 INFO L276 IsEmpty]: Start isEmpty. Operand 5091 states and 7740 transitions. [2020-10-29 13:30:42,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-29 13:30:42,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:30:42,615 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, 1, 1, 1, 1] [2020-10-29 13:30:42,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 13:30:42,615 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:30:42,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:30:42,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1517834289, now seen corresponding path program 1 times [2020-10-29 13:30:42,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:30:42,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1858783565] [2020-10-29 13:30:42,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:30:42,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:30:42,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:42,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:42,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:43,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:43,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:30:43,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-29 13:30:43,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:30:43,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1162 [2020-10-29 13:30:43,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:30:43,800 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:30:43,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:30:43,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:30:43,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-29 13:30:43,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:30:44,125 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:30:44,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:30:44,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:30:44,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:44,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:30:44,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:30:44,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:30:44,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-29 13:30:44,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:30:44,159 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:30:44,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:30:44,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:30:44,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:30:44,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:30:44,183 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 13:30:44,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1858783565] [2020-10-29 13:30:44,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:30:44,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:30:44,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637657594] [2020-10-29 13:30:44,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:30:44,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:30:44,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:30:44,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:30:44,185 INFO L87 Difference]: Start difference. First operand 5091 states and 7740 transitions. Second operand 6 states. [2020-10-29 13:30:44,523 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-29 13:30:45,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:30:45,616 INFO L93 Difference]: Finished difference Result 10115 states and 15404 transitions. [2020-10-29 13:30:45,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 13:30:45,617 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 84 [2020-10-29 13:30:45,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:30:45,635 INFO L225 Difference]: With dead ends: 10115 [2020-10-29 13:30:45,636 INFO L226 Difference]: Without dead ends: 5091 [2020-10-29 13:30:45,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:30:45,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5091 states. [2020-10-29 13:30:46,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5091 to 5091. [2020-10-29 13:30:46,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5091 states. [2020-10-29 13:30:46,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5091 states to 5091 states and 7691 transitions. [2020-10-29 13:30:46,315 INFO L78 Accepts]: Start accepts. Automaton has 5091 states and 7691 transitions. Word has length 84 [2020-10-29 13:30:46,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:30:46,315 INFO L481 AbstractCegarLoop]: Abstraction has 5091 states and 7691 transitions. [2020-10-29 13:30:46,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:30:46,316 INFO L276 IsEmpty]: Start isEmpty. Operand 5091 states and 7691 transitions. [2020-10-29 13:30:46,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-29 13:30:46,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:30:46,317 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, 1, 1, 1, 1] [2020-10-29 13:30:46,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 13:30:46,317 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:30:46,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:30:46,318 INFO L82 PathProgramCache]: Analyzing trace with hash 2014269300, now seen corresponding path program 1 times [2020-10-29 13:30:46,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:30:46,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [553621622] [2020-10-29 13:30:46,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:30:46,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:30:46,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:46,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:46,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:46,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:30:46,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-29 13:30:46,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:30:46,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 391 [2020-10-29 13:30:46,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:30:46,730 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:30:46,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:30:46,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-29 13:30:46,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 13:30:46,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:30:47,064 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:30:47,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:30:47,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:30:47,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:47,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:30:47,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:30:47,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:30:47,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:30:47,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:30:47,080 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:30:47,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:30:47,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:30:47,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:30:47,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:30:47,101 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 13:30:47,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [553621622] [2020-10-29 13:30:47,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:30:47,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:30:47,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12287525] [2020-10-29 13:30:47,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:30:47,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:30:47,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:30:47,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:30:47,103 INFO L87 Difference]: Start difference. First operand 5091 states and 7691 transitions. Second operand 4 states. [2020-10-29 13:30:47,417 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-29 13:30:49,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:30:49,235 INFO L93 Difference]: Finished difference Result 14361 states and 21663 transitions. [2020-10-29 13:30:49,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:30:49,236 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 84 [2020-10-29 13:30:49,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:30:49,266 INFO L225 Difference]: With dead ends: 14361 [2020-10-29 13:30:49,267 INFO L226 Difference]: Without dead ends: 9341 [2020-10-29 13:30:49,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:30:49,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9341 states. [2020-10-29 13:30:50,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9341 to 9325. [2020-10-29 13:30:50,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9325 states. [2020-10-29 13:30:50,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9325 states to 9325 states and 13937 transitions. [2020-10-29 13:30:50,571 INFO L78 Accepts]: Start accepts. Automaton has 9325 states and 13937 transitions. Word has length 84 [2020-10-29 13:30:50,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:30:50,571 INFO L481 AbstractCegarLoop]: Abstraction has 9325 states and 13937 transitions. [2020-10-29 13:30:50,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:30:50,571 INFO L276 IsEmpty]: Start isEmpty. Operand 9325 states and 13937 transitions. [2020-10-29 13:30:50,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-29 13:30:50,572 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:30:50,572 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:30:50,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 13:30:50,572 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:30:50,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:30:50,573 INFO L82 PathProgramCache]: Analyzing trace with hash 2030219962, now seen corresponding path program 1 times [2020-10-29 13:30:50,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:30:50,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [168312399] [2020-10-29 13:30:50,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:30:50,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:30:50,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:50,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:50,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:51,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:30:51,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-29 13:30:51,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:30:51,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 684 [2020-10-29 13:30:51,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:30:51,278 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:30:51,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:30:51,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:30:51,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-29 13:30:51,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:30:51,617 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:30:51,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:30:51,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:30:51,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:51,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:30:51,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:30:51,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:30:51,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 13:30:51,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:30:51,644 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:30:51,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:30:51,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:30:51,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:30:51,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:30:51,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:30:51,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [168312399] [2020-10-29 13:30:51,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:30:51,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:30:51,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054534442] [2020-10-29 13:30:51,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:30:51,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:30:51,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:30:51,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:30:51,666 INFO L87 Difference]: Start difference. First operand 9325 states and 13937 transitions. Second operand 6 states. [2020-10-29 13:30:52,026 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-29 13:30:53,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:30:53,737 INFO L93 Difference]: Finished difference Result 18592 states and 27811 transitions. [2020-10-29 13:30:53,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 13:30:53,743 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 85 [2020-10-29 13:30:53,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:30:53,766 INFO L225 Difference]: With dead ends: 18592 [2020-10-29 13:30:53,766 INFO L226 Difference]: Without dead ends: 9325 [2020-10-29 13:30:53,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:30:53,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9325 states. [2020-10-29 13:30:55,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9325 to 9325. [2020-10-29 13:30:55,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9325 states. [2020-10-29 13:30:55,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9325 states to 9325 states and 13841 transitions. [2020-10-29 13:30:55,217 INFO L78 Accepts]: Start accepts. Automaton has 9325 states and 13841 transitions. Word has length 85 [2020-10-29 13:30:55,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:30:55,218 INFO L481 AbstractCegarLoop]: Abstraction has 9325 states and 13841 transitions. [2020-10-29 13:30:55,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:30:55,218 INFO L276 IsEmpty]: Start isEmpty. Operand 9325 states and 13841 transitions. [2020-10-29 13:30:55,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-29 13:30:55,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:30:55,219 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, 1, 1, 1, 1, 1] [2020-10-29 13:30:55,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 13:30:55,219 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:30:55,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:30:55,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1705897183, now seen corresponding path program 1 times [2020-10-29 13:30:55,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:30:55,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [302247895] [2020-10-29 13:30:55,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:30:55,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:30:55,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:55,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:55,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:30:55,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-29 13:30:55,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:30:55,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 240 [2020-10-29 13:30:55,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:30:55,483 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:30:55,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:30:55,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 13:30:55,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 13:30:55,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:30:55,813 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:30:55,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:30:55,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:30:55,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:55,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:30:55,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:30:55,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:30:55,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:30:55,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:30:55,828 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:30:55,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:30:55,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:30:55,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:30:55,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:30:55,849 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 13:30:55,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [302247895] [2020-10-29 13:30:55,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:30:55,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:30:55,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443463801] [2020-10-29 13:30:55,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:30:55,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:30:55,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:30:55,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:30:55,852 INFO L87 Difference]: Start difference. First operand 9325 states and 13841 transitions. Second operand 4 states. [2020-10-29 13:30:56,154 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-29 13:30:58,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:30:58,928 INFO L93 Difference]: Finished difference Result 26323 states and 38901 transitions. [2020-10-29 13:30:58,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:30:58,929 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 85 [2020-10-29 13:30:58,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:30:58,964 INFO L225 Difference]: With dead ends: 26323 [2020-10-29 13:30:58,964 INFO L226 Difference]: Without dead ends: 17053 [2020-10-29 13:30:58,980 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 13:30:58,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17053 states. [2020-10-29 13:31:01,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17053 to 17044. [2020-10-29 13:31:01,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17044 states. [2020-10-29 13:31:01,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17044 states to 17044 states and 24915 transitions. [2020-10-29 13:31:01,620 INFO L78 Accepts]: Start accepts. Automaton has 17044 states and 24915 transitions. Word has length 85 [2020-10-29 13:31:01,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:31:01,621 INFO L481 AbstractCegarLoop]: Abstraction has 17044 states and 24915 transitions. [2020-10-29 13:31:01,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:31:01,621 INFO L276 IsEmpty]: Start isEmpty. Operand 17044 states and 24915 transitions. [2020-10-29 13:31:01,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-29 13:31:01,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:31:01,622 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, 1, 1, 1, 1, 1, 1] [2020-10-29 13:31:01,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 13:31:01,622 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:31:01,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:31:01,622 INFO L82 PathProgramCache]: Analyzing trace with hash -923022565, now seen corresponding path program 1 times [2020-10-29 13:31:01,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:31:01,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117023960] [2020-10-29 13:31:01,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:31:01,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:31:01,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:01,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:02,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:31:02,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-29 13:31:02,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:31:02,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 431 [2020-10-29 13:31:02,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:31:02,078 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:31:02,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:31:02,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:31:02,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-29 13:31:02,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:31:02,434 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:31:02,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:31:02,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:31:02,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:02,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:31:02,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:31:02,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:31:02,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 13:31:02,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:31:02,458 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:31:02,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:31:02,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:31:02,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:31:02,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:31:02,478 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 13:31:02,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [117023960] [2020-10-29 13:31:02,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:31:02,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:31:02,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016358226] [2020-10-29 13:31:02,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:31:02,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:31:02,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:31:02,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:31:02,480 INFO L87 Difference]: Start difference. First operand 17044 states and 24915 transitions. Second operand 6 states. [2020-10-29 13:31:02,832 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-29 13:31:04,377 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-29 13:31:08,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:31:08,387 INFO L93 Difference]: Finished difference Result 50842 states and 74263 transitions. [2020-10-29 13:31:08,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:31:08,388 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 86 [2020-10-29 13:31:08,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:31:08,445 INFO L225 Difference]: With dead ends: 50842 [2020-10-29 13:31:08,445 INFO L226 Difference]: Without dead ends: 33847 [2020-10-29 13:31:08,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:31:08,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33847 states. [2020-10-29 13:31:13,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33847 to 33844. [2020-10-29 13:31:13,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33844 states. [2020-10-29 13:31:13,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33844 states to 33844 states and 49203 transitions. [2020-10-29 13:31:13,805 INFO L78 Accepts]: Start accepts. Automaton has 33844 states and 49203 transitions. Word has length 86 [2020-10-29 13:31:13,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:31:13,805 INFO L481 AbstractCegarLoop]: Abstraction has 33844 states and 49203 transitions. [2020-10-29 13:31:13,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:31:13,805 INFO L276 IsEmpty]: Start isEmpty. Operand 33844 states and 49203 transitions. [2020-10-29 13:31:13,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-29 13:31:13,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:31:13,806 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, 1, 1, 1, 1, 1, 1] [2020-10-29 13:31:13,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 13:31:13,806 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:31:13,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:31:13,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1903450880, now seen corresponding path program 1 times [2020-10-29 13:31:13,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:31:13,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [597826339] [2020-10-29 13:31:13,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:31:13,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:31:13,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:13,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:31:13,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-29 13:31:13,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:31:13,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 159 [2020-10-29 13:31:13,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:31:13,991 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:31:13,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:31:13,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-29 13:31:13,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-29 13:31:13,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:31:14,310 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:31:14,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:31:14,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:31:14,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:14,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:31:14,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:31:14,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:31:14,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 13:31:14,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:31:14,323 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:31:14,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:31:14,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:31:14,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:31:14,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:31:14,334 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 13:31:14,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [597826339] [2020-10-29 13:31:14,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:31:14,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:31:14,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297059485] [2020-10-29 13:31:14,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:31:14,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:31:14,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:31:14,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:31:14,336 INFO L87 Difference]: Start difference. First operand 33844 states and 49203 transitions. Second operand 5 states. [2020-10-29 13:31:24,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:31:24,196 INFO L93 Difference]: Finished difference Result 61017 states and 88423 transitions. [2020-10-29 13:31:24,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:31:24,197 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 86 [2020-10-29 13:31:24,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:31:24,287 INFO L225 Difference]: With dead ends: 61017 [2020-10-29 13:31:24,288 INFO L226 Difference]: Without dead ends: 61014 [2020-10-29 13:31:24,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:31:24,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61014 states. [2020-10-29 13:31:29,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61014 to 34868. [2020-10-29 13:31:29,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34868 states. [2020-10-29 13:31:29,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34868 states to 34868 states and 50099 transitions. [2020-10-29 13:31:29,983 INFO L78 Accepts]: Start accepts. Automaton has 34868 states and 50099 transitions. Word has length 86 [2020-10-29 13:31:29,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:31:29,983 INFO L481 AbstractCegarLoop]: Abstraction has 34868 states and 50099 transitions. [2020-10-29 13:31:29,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:31:29,983 INFO L276 IsEmpty]: Start isEmpty. Operand 34868 states and 50099 transitions. [2020-10-29 13:31:29,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-29 13:31:29,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:31:29,994 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:31:29,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 13:31:29,994 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:31:29,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:31:29,994 INFO L82 PathProgramCache]: Analyzing trace with hash -2074962194, now seen corresponding path program 1 times [2020-10-29 13:31:29,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:31:29,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2053931215] [2020-10-29 13:31:29,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:31:30,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:31:30,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:30,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:30,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:30,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:30,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:30,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:33,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:33,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:34,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:34,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:35,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:31:35,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-29 13:31:35,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 13:31:35,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 13:31:35,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:31:35,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:31:35,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:31:35,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-29 13:31:35,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-29 13:31:35,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:31:35,378 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:31:35,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:31:35,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:31:35,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:35,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:31:35,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:31:35,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:31:35,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:31:35,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:31:35,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:31:35,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:31:35,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:31:35,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:31:35,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:31:35,424 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:31:35,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2053931215] [2020-10-29 13:31:35,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:31:35,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 13:31:35,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393184560] [2020-10-29 13:31:35,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:31:35,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:31:35,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:31:35,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:31:35,426 INFO L87 Difference]: Start difference. First operand 34868 states and 50099 transitions. Second operand 6 states. [2020-10-29 13:31:35,784 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-29 13:31:37,486 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-29 13:31:38,036 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-29 13:31:47,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:31:47,417 INFO L93 Difference]: Finished difference Result 102627 states and 148327 transitions. [2020-10-29 13:31:47,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:31:47,418 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 117 [2020-10-29 13:31:47,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:31:47,488 INFO L225 Difference]: With dead ends: 102627 [2020-10-29 13:31:47,488 INFO L226 Difference]: Without dead ends: 67808 [2020-10-29 13:31:47,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:31:47,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67808 states. [2020-10-29 13:31:58,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67808 to 67764. [2020-10-29 13:31:58,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67764 states. [2020-10-29 13:31:58,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67764 states to 67764 states and 97459 transitions. [2020-10-29 13:31:58,569 INFO L78 Accepts]: Start accepts. Automaton has 67764 states and 97459 transitions. Word has length 117 [2020-10-29 13:31:58,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:31:58,569 INFO L481 AbstractCegarLoop]: Abstraction has 67764 states and 97459 transitions. [2020-10-29 13:31:58,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:31:58,570 INFO L276 IsEmpty]: Start isEmpty. Operand 67764 states and 97459 transitions. [2020-10-29 13:31:58,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-29 13:31:58,584 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:31:58,584 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:31:58,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 13:31:58,584 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:31:58,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:31:58,585 INFO L82 PathProgramCache]: Analyzing trace with hash 773058396, now seen corresponding path program 1 times [2020-10-29 13:31:58,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:31:58,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [20059615] [2020-10-29 13:31:58,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:31:58,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:31:58,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:58,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:58,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:58,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:58,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:59,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:32:01,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:32:01,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:32:01,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:32:01,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:32:02,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:32:02,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:32:02,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:32:03,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:32:03,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:32:03,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-29 13:32:03,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 13:32:03,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-29 13:32:03,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:32:03,641 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:32:03,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:32:03,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-29 13:32:03,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-29 13:32:03,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:32:03,998 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:32:03,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:32:04,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:32:04,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:32:04,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:32:04,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:32:04,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:32:04,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 13:32:04,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:32:04,013 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:32:04,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:32:04,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:32:04,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:32:04,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:32:04,036 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:32:04,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [20059615] [2020-10-29 13:32:04,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:32:04,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 13:32:04,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883525828] [2020-10-29 13:32:04,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:32:04,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:32:04,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:32:04,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:32:04,038 INFO L87 Difference]: Start difference. First operand 67764 states and 97459 transitions. Second operand 6 states. [2020-10-29 13:32:04,414 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-29 13:32:06,277 WARN L193 SmtUtils]: Spent 442.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-29 13:32:06,948 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-29 13:32:22,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:32:22,136 INFO L93 Difference]: Finished difference Result 169331 states and 243767 transitions. [2020-10-29 13:32:22,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:32:22,136 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 117 [2020-10-29 13:32:22,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:32:22,443 INFO L225 Difference]: With dead ends: 169331 [2020-10-29 13:32:22,443 INFO L226 Difference]: Without dead ends: 101616 [2020-10-29 13:32:22,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:32:22,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101616 states. [2020-10-29 13:32:37,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101616 to 97012. [2020-10-29 13:32:37,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97012 states. [2020-10-29 13:32:38,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97012 states to 97012 states and 140019 transitions. [2020-10-29 13:32:38,158 INFO L78 Accepts]: Start accepts. Automaton has 97012 states and 140019 transitions. Word has length 117 [2020-10-29 13:32:38,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:32:38,159 INFO L481 AbstractCegarLoop]: Abstraction has 97012 states and 140019 transitions. [2020-10-29 13:32:38,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:32:38,159 INFO L276 IsEmpty]: Start isEmpty. Operand 97012 states and 140019 transitions. [2020-10-29 13:32:38,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-29 13:32:38,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:32:38,169 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:32:38,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 13:32:38,169 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:32:38,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:32:38,170 INFO L82 PathProgramCache]: Analyzing trace with hash 36956514, now seen corresponding path program 1 times [2020-10-29 13:32:38,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:32:38,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816938348] [2020-10-29 13:32:38,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:32:38,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:32:38,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:32:38,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:32:38,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:32:38,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:32:38,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:32:38,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:32:40,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:32:40,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:32:41,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:32:41,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:32:41,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:32:43,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:32:43,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-29 13:32:43,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 13:32:43,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-29 13:32:43,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:32:43,208 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:32:43,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:32:43,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-29 13:32:43,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-29 13:32:43,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:32:43,551 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:32:43,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:32:43,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:32:43,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:32:43,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:32:43,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:32:43,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:32:43,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 13:32:43,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:32:43,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:32:43,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:32:43,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:32:43,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:32:43,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:32:43,594 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:32:43,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816938348] [2020-10-29 13:32:43,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:32:43,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 13:32:43,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314841431] [2020-10-29 13:32:43,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:32:43,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:32:43,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:32:43,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:32:43,596 INFO L87 Difference]: Start difference. First operand 97012 states and 140019 transitions. Second operand 6 states. [2020-10-29 13:32:43,964 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-29 13:32:45,752 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-29 13:32:46,357 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 183