/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 00:06:48,133 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 00:06:48,136 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 00:06:48,190 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 00:06:48,191 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 00:06:48,197 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 00:06:48,199 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 00:06:48,205 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 00:06:48,208 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 00:06:48,217 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 00:06:48,218 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 00:06:48,219 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 00:06:48,220 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 00:06:48,223 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 00:06:48,227 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 00:06:48,230 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 00:06:48,231 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 00:06:48,236 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 00:06:48,244 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 00:06:48,251 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 00:06:48,254 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 00:06:48,256 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 00:06:48,258 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 00:06:48,260 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 00:06:48,271 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 00:06:48,291 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 00:06:48,292 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 00:06:48,293 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 00:06:48,295 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 00:06:48,297 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 00:06:48,297 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 00:06:48,298 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 00:06:48,300 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 00:06:48,301 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 00:06:48,302 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 00:06:48,303 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 00:06:48,303 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 00:06:48,304 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 00:06:48,304 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 00:06:48,305 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 00:06:48,306 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 00:06:48,313 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 00:06:48,365 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 00:06:48,366 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 00:06:48,367 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 00:06:48,368 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 00:06:48,368 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 00:06:48,368 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 00:06:48,368 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 00:06:48,369 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 00:06:48,369 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 00:06:48,369 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 00:06:48,369 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 00:06:48,370 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 00:06:48,370 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 00:06:48,370 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 00:06:48,370 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 00:06:48,370 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 00:06:48,371 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 00:06:48,371 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 00:06:48,371 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 00:06:48,371 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 00:06:48,371 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 00:06:48,372 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:06:48,372 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 00:06:48,372 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 00:06:48,373 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 00:06:48,373 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 00:06:48,373 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 00:06:48,373 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 00:06:48,373 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 00:06:48,374 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-28 00:06:48,752 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 00:06:48,791 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 00:06:48,794 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 00:06:48,795 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 00:06:48,796 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 00:06:48,797 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 00:06:48,881 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0cffdd03a/501e9a4f221847e0b1a081a004fa83ac/FLAG941751c69 [2020-10-28 00:06:49,660 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 00:06:49,661 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 00:06:49,679 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0cffdd03a/501e9a4f221847e0b1a081a004fa83ac/FLAG941751c69 [2020-10-28 00:06:49,952 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0cffdd03a/501e9a4f221847e0b1a081a004fa83ac [2020-10-28 00:06:49,957 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 00:06:49,964 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 00:06:49,969 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 00:06:49,969 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 00:06:49,973 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 00:06:49,975 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:06:49" (1/1) ... [2020-10-28 00:06:49,981 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44be62ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:06:49, skipping insertion in model container [2020-10-28 00:06:49,981 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:06:49" (1/1) ... [2020-10-28 00:06:49,990 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 00:06:50,053 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 00:06:50,274 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:06:50,290 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 00:06:50,346 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:06:50,370 INFO L208 MainTranslator]: Completed translation [2020-10-28 00:06:50,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:06:50 WrapperNode [2020-10-28 00:06:50,371 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 00:06:50,372 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 00:06:50,372 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 00:06:50,372 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 00:06:50,387 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:06:50" (1/1) ... [2020-10-28 00:06:50,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:06:50" (1/1) ... [2020-10-28 00:06:50,400 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:06:50" (1/1) ... [2020-10-28 00:06:50,400 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:06:50" (1/1) ... [2020-10-28 00:06:50,412 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:06:50" (1/1) ... [2020-10-28 00:06:50,423 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:06:50" (1/1) ... [2020-10-28 00:06:50,429 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:06:50" (1/1) ... [2020-10-28 00:06:50,442 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 00:06:50,444 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 00:06:50,444 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 00:06:50,444 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 00:06:50,447 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:06:50" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:06:50,552 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 00:06:50,552 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 00:06:50,553 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 00:06:50,553 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 00:06:50,554 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 00:06:50,555 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 00:06:50,555 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 00:06:50,556 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 00:06:50,556 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 00:06:50,557 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 00:06:50,558 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 00:06:50,559 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 00:06:50,559 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 00:06:50,559 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 00:06:50,559 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 00:06:50,561 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 00:06:50,561 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 00:06:50,562 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 00:06:50,563 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 00:06:50,563 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 00:06:50,563 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 00:06:50,563 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 00:06:50,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 00:06:50,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 00:06:50,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 00:06:50,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 00:06:50,565 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 00:06:50,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 00:06:51,371 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 00:06:51,372 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 00:06:51,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:06:51 BoogieIcfgContainer [2020-10-28 00:06:51,375 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 00:06:51,378 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 00:06:51,378 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 00:06:51,382 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 00:06:51,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:06:49" (1/3) ... [2020-10-28 00:06:51,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f5664e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:06:51, skipping insertion in model container [2020-10-28 00:06:51,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:06:50" (2/3) ... [2020-10-28 00:06:51,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f5664e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:06:51, skipping insertion in model container [2020-10-28 00:06:51,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:06:51" (3/3) ... [2020-10-28 00:06:51,386 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 00:06:51,398 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 00:06:51,404 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 00:06:51,418 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 00:06:51,449 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 00:06:51,449 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 00:06:51,449 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 00:06:51,450 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 00:06:51,450 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 00:06:51,450 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 00:06:51,450 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 00:06:51,450 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 00:06:51,470 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states. [2020-10-28 00:06:51,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 00:06:51,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:06:51,479 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] [2020-10-28 00:06:51,479 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:06:51,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:06:51,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1951126501, now seen corresponding path program 1 times [2020-10-28 00:06:51,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:06:51,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1244135837] [2020-10-28 00:06:51,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:06:51,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:06:51,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:52,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:52,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:53,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:06:53,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 00:06:53,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 00:06:53,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1635 [2020-10-28 00:06:53,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:06:53,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:06:53,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 00:06:53,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 00:06:53,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 00:06:53,768 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 00:06:53,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:06:53,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:06:53,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:53,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:06:53,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:06:53,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:06:53,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 00:06:53,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:06:53,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:06:53,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:06:53,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:06:53,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:06:53,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:06:53,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1244135837] [2020-10-28 00:06:53,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:06:53,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:06:53,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776129549] [2020-10-28 00:06:53,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:06:53,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:06:53,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:06:53,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:06:53,946 INFO L87 Difference]: Start difference. First operand 91 states. Second operand 4 states. [2020-10-28 00:06:54,213 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 00:06:54,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:06:54,739 INFO L93 Difference]: Finished difference Result 203 states and 315 transitions. [2020-10-28 00:06:54,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:06:54,741 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2020-10-28 00:06:54,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:06:54,758 INFO L225 Difference]: With dead ends: 203 [2020-10-28 00:06:54,759 INFO L226 Difference]: Without dead ends: 128 [2020-10-28 00:06:54,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:06:54,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-28 00:06:54,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 125. [2020-10-28 00:06:54,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-28 00:06:54,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 183 transitions. [2020-10-28 00:06:54,836 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 183 transitions. Word has length 42 [2020-10-28 00:06:54,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:06:54,837 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 183 transitions. [2020-10-28 00:06:54,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:06:54,837 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 183 transitions. [2020-10-28 00:06:54,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 00:06:54,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:06:54,839 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] [2020-10-28 00:06:54,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 00:06:54,840 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:06:54,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:06:54,841 INFO L82 PathProgramCache]: Analyzing trace with hash -912237758, now seen corresponding path program 1 times [2020-10-28 00:06:54,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:06:54,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2051770044] [2020-10-28 00:06:54,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:06:54,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:06:54,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:54,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:55,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:06:55,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 00:06:55,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:06:55,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 457 [2020-10-28 00:06:55,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:06:55,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:06:55,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 00:06:55,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 00:06:55,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:06:55,611 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 00:06:55,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:06:55,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:06:55,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:55,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:06:55,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:06:55,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:06:55,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:06:55,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:06:55,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:06:55,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:06:55,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:06:55,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:06:55,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:06:55,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2051770044] [2020-10-28 00:06:55,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:06:55,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:06:55,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851186294] [2020-10-28 00:06:55,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:06:55,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:06:55,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:06:55,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:06:55,648 INFO L87 Difference]: Start difference. First operand 125 states and 183 transitions. Second operand 4 states. [2020-10-28 00:06:55,849 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 00:06:56,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:06:56,275 INFO L93 Difference]: Finished difference Result 295 states and 449 transitions. [2020-10-28 00:06:56,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:06:56,276 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2020-10-28 00:06:56,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:06:56,279 INFO L225 Difference]: With dead ends: 295 [2020-10-28 00:06:56,279 INFO L226 Difference]: Without dead ends: 194 [2020-10-28 00:06:56,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:06:56,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-28 00:06:56,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 191. [2020-10-28 00:06:56,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-10-28 00:06:56,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 286 transitions. [2020-10-28 00:06:56,312 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 286 transitions. Word has length 43 [2020-10-28 00:06:56,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:06:56,312 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 286 transitions. [2020-10-28 00:06:56,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:06:56,312 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 286 transitions. [2020-10-28 00:06:56,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 00:06:56,314 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:06:56,314 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] [2020-10-28 00:06:56,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 00:06:56,315 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:06:56,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:06:56,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1181509724, now seen corresponding path program 1 times [2020-10-28 00:06:56,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:06:56,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [524910845] [2020-10-28 00:06:56,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:06:56,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:06:56,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:56,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:57,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:06:57,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 00:06:57,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:06:57,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 808 [2020-10-28 00:06:57,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:06:57,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:06:57,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 00:06:57,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 00:06:57,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:06:57,384 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 00:06:57,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:06:57,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:06:57,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:57,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:06:57,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:06:57,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:06:57,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:06:57,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:06:57,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:06:57,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:06:57,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:06:57,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:06:57,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:06:57,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [524910845] [2020-10-28 00:06:57,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:06:57,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:06:57,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203929934] [2020-10-28 00:06:57,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:06:57,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:06:57,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:06:57,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:06:57,419 INFO L87 Difference]: Start difference. First operand 191 states and 286 transitions. Second operand 6 states. [2020-10-28 00:06:57,632 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-28 00:06:58,264 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-28 00:06:58,446 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 00:06:58,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:06:58,478 INFO L93 Difference]: Finished difference Result 859 states and 1334 transitions. [2020-10-28 00:06:58,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 00:06:58,478 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2020-10-28 00:06:58,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:06:58,484 INFO L225 Difference]: With dead ends: 859 [2020-10-28 00:06:58,484 INFO L226 Difference]: Without dead ends: 692 [2020-10-28 00:06:58,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:06:58,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2020-10-28 00:06:58,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 355. [2020-10-28 00:06:58,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2020-10-28 00:06:58,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 538 transitions. [2020-10-28 00:06:58,553 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 538 transitions. Word has length 44 [2020-10-28 00:06:58,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:06:58,554 INFO L481 AbstractCegarLoop]: Abstraction has 355 states and 538 transitions. [2020-10-28 00:06:58,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:06:58,554 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 538 transitions. [2020-10-28 00:06:58,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 00:06:58,557 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:06:58,557 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] [2020-10-28 00:06:58,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 00:06:58,557 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:06:58,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:06:58,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1692380302, now seen corresponding path program 1 times [2020-10-28 00:06:58,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:06:58,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335318909] [2020-10-28 00:06:58,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:06:58,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:06:58,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:58,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:59,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:06:59,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-28 00:06:59,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:06:59,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 541 [2020-10-28 00:06:59,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:06:59,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:06:59,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-28 00:06:59,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 00:06:59,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:06:59,384 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 00:06:59,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:06:59,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:06:59,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:59,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:06:59,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:06:59,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:06:59,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 00:06:59,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:06:59,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:06:59,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:06:59,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:06:59,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:06:59,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:06:59,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [335318909] [2020-10-28 00:06:59,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:06:59,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:06:59,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231124413] [2020-10-28 00:06:59,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:06:59,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:06:59,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:06:59,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:06:59,421 INFO L87 Difference]: Start difference. First operand 355 states and 538 transitions. Second operand 5 states. [2020-10-28 00:06:59,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:06:59,999 INFO L93 Difference]: Finished difference Result 702 states and 1068 transitions. [2020-10-28 00:06:59,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 00:06:59,999 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 45 [2020-10-28 00:07:00,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:07:00,004 INFO L225 Difference]: With dead ends: 702 [2020-10-28 00:07:00,005 INFO L226 Difference]: Without dead ends: 699 [2020-10-28 00:07:00,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:07:00,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2020-10-28 00:07:00,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 371. [2020-10-28 00:07:00,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 371 states. [2020-10-28 00:07:00,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 554 transitions. [2020-10-28 00:07:00,048 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 554 transitions. Word has length 45 [2020-10-28 00:07:00,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:07:00,049 INFO L481 AbstractCegarLoop]: Abstraction has 371 states and 554 transitions. [2020-10-28 00:07:00,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:07:00,049 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 554 transitions. [2020-10-28 00:07:00,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 00:07:00,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:07:00,051 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] [2020-10-28 00:07:00,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 00:07:00,052 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:07:00,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:07:00,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1222226381, now seen corresponding path program 1 times [2020-10-28 00:07:00,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:07:00,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1009292090] [2020-10-28 00:07:00,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:07:00,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:00,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:00,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:00,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:00,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-28 00:07:00,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:07:00,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 416 [2020-10-28 00:07:00,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:00,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:07:00,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 00:07:00,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 00:07:00,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 00:07:00,711 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 00:07:00,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:07:00,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:00,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:00,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:00,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:07:00,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:07:00,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:07:00,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:00,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:07:00,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:07:00,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:07:00,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:00,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:07:00,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1009292090] [2020-10-28 00:07:00,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:07:00,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:07:00,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758604099] [2020-10-28 00:07:00,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:07:00,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:07:00,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:07:00,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:07:00,762 INFO L87 Difference]: Start difference. First operand 371 states and 554 transitions. Second operand 6 states. [2020-10-28 00:07:01,334 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 00:07:01,553 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 00:07:01,747 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-28 00:07:02,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:07:02,114 INFO L93 Difference]: Finished difference Result 1300 states and 1960 transitions. [2020-10-28 00:07:02,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 00:07:02,115 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-10-28 00:07:02,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:07:02,121 INFO L225 Difference]: With dead ends: 1300 [2020-10-28 00:07:02,121 INFO L226 Difference]: Without dead ends: 953 [2020-10-28 00:07:02,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 00:07:02,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2020-10-28 00:07:02,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 947. [2020-10-28 00:07:02,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 947 states. [2020-10-28 00:07:02,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 1418 transitions. [2020-10-28 00:07:02,222 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 1418 transitions. Word has length 46 [2020-10-28 00:07:02,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:07:02,222 INFO L481 AbstractCegarLoop]: Abstraction has 947 states and 1418 transitions. [2020-10-28 00:07:02,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:07:02,223 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 1418 transitions. [2020-10-28 00:07:02,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 00:07:02,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:07:02,230 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] [2020-10-28 00:07:02,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 00:07:02,232 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:07:02,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:07:02,232 INFO L82 PathProgramCache]: Analyzing trace with hash 68543370, now seen corresponding path program 1 times [2020-10-28 00:07:02,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:07:02,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1519523614] [2020-10-28 00:07:02,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:07:02,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:02,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:02,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:02,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:02,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 00:07:02,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:07:02,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 340 [2020-10-28 00:07:02,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:02,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:07:02,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 00:07:02,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 00:07:02,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:02,795 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 00:07:02,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:07:02,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:02,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:02,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:02,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:07:02,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:07:02,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 00:07:02,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:02,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:07:02,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:07:02,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:07:02,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:07:02,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:07:02,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1519523614] [2020-10-28 00:07:02,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:07:02,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:07:02,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472552204] [2020-10-28 00:07:02,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:07:02,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:07:02,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:07:02,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:07:02,850 INFO L87 Difference]: Start difference. First operand 947 states and 1418 transitions. Second operand 4 states. [2020-10-28 00:07:03,055 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 00:07:03,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:07:03,659 INFO L93 Difference]: Finished difference Result 2481 states and 3702 transitions. [2020-10-28 00:07:03,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:07:03,660 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-10-28 00:07:03,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:07:03,671 INFO L225 Difference]: With dead ends: 2481 [2020-10-28 00:07:03,671 INFO L226 Difference]: Without dead ends: 1558 [2020-10-28 00:07:03,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:07:03,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1558 states. [2020-10-28 00:07:03,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1558 to 1555. [2020-10-28 00:07:03,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1555 states. [2020-10-28 00:07:03,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1555 states to 1555 states and 2282 transitions. [2020-10-28 00:07:03,824 INFO L78 Accepts]: Start accepts. Automaton has 1555 states and 2282 transitions. Word has length 48 [2020-10-28 00:07:03,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:07:03,825 INFO L481 AbstractCegarLoop]: Abstraction has 1555 states and 2282 transitions. [2020-10-28 00:07:03,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:07:03,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1555 states and 2282 transitions. [2020-10-28 00:07:03,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 00:07:03,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:07:03,827 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] [2020-10-28 00:07:03,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 00:07:03,827 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:07:03,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:07:03,828 INFO L82 PathProgramCache]: Analyzing trace with hash -207293692, now seen corresponding path program 1 times [2020-10-28 00:07:03,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:07:03,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1497190607] [2020-10-28 00:07:03,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:07:03,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:03,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:03,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:04,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:04,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 00:07:04,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:07:04,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 391 [2020-10-28 00:07:04,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:04,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:07:04,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 00:07:04,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 00:07:04,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:04,422 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 00:07:04,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:07:04,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:04,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:04,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:04,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:07:04,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:07:04,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:07:04,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:04,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:07:04,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:07:04,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:07:04,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:04,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:07:04,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1497190607] [2020-10-28 00:07:04,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:07:04,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:07:04,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57501556] [2020-10-28 00:07:04,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:07:04,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:07:04,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:07:04,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:07:04,454 INFO L87 Difference]: Start difference. First operand 1555 states and 2282 transitions. Second operand 4 states. [2020-10-28 00:07:04,631 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 00:07:05,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:07:05,182 INFO L93 Difference]: Finished difference Result 3719 states and 5464 transitions. [2020-10-28 00:07:05,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:07:05,183 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-10-28 00:07:05,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:07:05,195 INFO L225 Difference]: With dead ends: 3719 [2020-10-28 00:07:05,195 INFO L226 Difference]: Without dead ends: 2188 [2020-10-28 00:07:05,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:07:05,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2188 states. [2020-10-28 00:07:05,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2188 to 2165. [2020-10-28 00:07:05,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2165 states. [2020-10-28 00:07:05,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2165 states to 2165 states and 3144 transitions. [2020-10-28 00:07:05,399 INFO L78 Accepts]: Start accepts. Automaton has 2165 states and 3144 transitions. Word has length 48 [2020-10-28 00:07:05,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:07:05,399 INFO L481 AbstractCegarLoop]: Abstraction has 2165 states and 3144 transitions. [2020-10-28 00:07:05,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:07:05,399 INFO L276 IsEmpty]: Start isEmpty. Operand 2165 states and 3144 transitions. [2020-10-28 00:07:05,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 00:07:05,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:07:05,402 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 00:07:05,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 00:07:05,402 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:07:05,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:07:05,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1997945583, now seen corresponding path program 1 times [2020-10-28 00:07:05,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:07:05,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238982122] [2020-10-28 00:07:05,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:07:05,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:05,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:05,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:05,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:05,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:05,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:06,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:10,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:10,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 00:07:10,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:07:10,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 00:07:10,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:10,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:07:10,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 00:07:10,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 00:07:10,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:10,673 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 00:07:10,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:07:10,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:10,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:10,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:10,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:07:10,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:07:10,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:07:10,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:10,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:07:10,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:07:10,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:07:10,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:10,712 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:07:10,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238982122] [2020-10-28 00:07:10,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:07:10,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:07:10,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747912819] [2020-10-28 00:07:10,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:07:10,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:07:10,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:07:10,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:07:10,721 INFO L87 Difference]: Start difference. First operand 2165 states and 3144 transitions. Second operand 4 states. [2020-10-28 00:07:11,432 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-28 00:07:11,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:07:11,479 INFO L93 Difference]: Finished difference Result 3779 states and 5510 transitions. [2020-10-28 00:07:11,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:07:11,480 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-28 00:07:11,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:07:11,491 INFO L225 Difference]: With dead ends: 3779 [2020-10-28 00:07:11,491 INFO L226 Difference]: Without dead ends: 1640 [2020-10-28 00:07:11,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:07:11,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1640 states. [2020-10-28 00:07:11,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1640 to 1637. [2020-10-28 00:07:11,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1637 states. [2020-10-28 00:07:11,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1637 states to 1637 states and 2363 transitions. [2020-10-28 00:07:11,679 INFO L78 Accepts]: Start accepts. Automaton has 1637 states and 2363 transitions. Word has length 66 [2020-10-28 00:07:11,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:07:11,680 INFO L481 AbstractCegarLoop]: Abstraction has 1637 states and 2363 transitions. [2020-10-28 00:07:11,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:07:11,681 INFO L276 IsEmpty]: Start isEmpty. Operand 1637 states and 2363 transitions. [2020-10-28 00:07:11,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 00:07:11,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:07:11,683 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 00:07:11,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 00:07:11,684 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:07:11,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:07:11,684 INFO L82 PathProgramCache]: Analyzing trace with hash -271522216, now seen corresponding path program 1 times [2020-10-28 00:07:11,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:07:11,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2015637494] [2020-10-28 00:07:11,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:07:11,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:11,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:11,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:12,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:12,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 00:07:12,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:07:12,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 651 [2020-10-28 00:07:12,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:12,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:07:12,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 00:07:12,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 00:07:12,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:12,644 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 00:07:12,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:07:12,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:12,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:12,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:12,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:07:12,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:07:12,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 00:07:12,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:12,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:07:12,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:07:12,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:07:12,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:12,686 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 00:07:12,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2015637494] [2020-10-28 00:07:12,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:07:12,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 00:07:12,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715810289] [2020-10-28 00:07:12,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:07:12,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:07:12,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:07:12,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:07:12,689 INFO L87 Difference]: Start difference. First operand 1637 states and 2363 transitions. Second operand 5 states. [2020-10-28 00:07:12,904 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 00:07:13,575 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-28 00:07:13,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:07:13,857 INFO L93 Difference]: Finished difference Result 4370 states and 6318 transitions. [2020-10-28 00:07:13,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 00:07:13,858 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-10-28 00:07:13,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:07:13,873 INFO L225 Difference]: With dead ends: 4370 [2020-10-28 00:07:13,873 INFO L226 Difference]: Without dead ends: 2839 [2020-10-28 00:07:13,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-28 00:07:13,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2839 states. [2020-10-28 00:07:14,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2839 to 2812. [2020-10-28 00:07:14,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2812 states. [2020-10-28 00:07:14,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2812 states to 2812 states and 3986 transitions. [2020-10-28 00:07:14,121 INFO L78 Accepts]: Start accepts. Automaton has 2812 states and 3986 transitions. Word has length 67 [2020-10-28 00:07:14,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:07:14,122 INFO L481 AbstractCegarLoop]: Abstraction has 2812 states and 3986 transitions. [2020-10-28 00:07:14,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:07:14,122 INFO L276 IsEmpty]: Start isEmpty. Operand 2812 states and 3986 transitions. [2020-10-28 00:07:14,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 00:07:14,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:07:14,124 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 00:07:14,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 00:07:14,124 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:07:14,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:07:14,126 INFO L82 PathProgramCache]: Analyzing trace with hash -175108876, now seen corresponding path program 1 times [2020-10-28 00:07:14,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:07:14,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765135883] [2020-10-28 00:07:14,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:07:14,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:14,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:14,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:14,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:14,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:14,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:17,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:17,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 00:07:17,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:07:17,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2908 [2020-10-28 00:07:17,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:17,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:07:17,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:07:17,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 00:07:17,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:17,250 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 00:07:17,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:07:17,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:17,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:17,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:17,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:07:17,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:07:17,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 00:07:17,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:17,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:07:17,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:07:17,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:07:17,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:17,280 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:07:17,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [765135883] [2020-10-28 00:07:17,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:07:17,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:07:17,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314890773] [2020-10-28 00:07:17,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:07:17,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:07:17,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:07:17,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:07:17,282 INFO L87 Difference]: Start difference. First operand 2812 states and 3986 transitions. Second operand 6 states. [2020-10-28 00:07:17,982 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-28 00:07:18,316 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-28 00:07:18,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:07:18,566 INFO L93 Difference]: Finished difference Result 7363 states and 10345 transitions. [2020-10-28 00:07:18,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 00:07:18,567 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2020-10-28 00:07:18,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:07:18,591 INFO L225 Difference]: With dead ends: 7363 [2020-10-28 00:07:18,591 INFO L226 Difference]: Without dead ends: 4593 [2020-10-28 00:07:18,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:07:18,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4593 states. [2020-10-28 00:07:18,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4593 to 3397. [2020-10-28 00:07:18,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3397 states. [2020-10-28 00:07:18,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3397 states to 3397 states and 4682 transitions. [2020-10-28 00:07:18,956 INFO L78 Accepts]: Start accepts. Automaton has 3397 states and 4682 transitions. Word has length 68 [2020-10-28 00:07:18,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:07:18,957 INFO L481 AbstractCegarLoop]: Abstraction has 3397 states and 4682 transitions. [2020-10-28 00:07:18,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:07:18,957 INFO L276 IsEmpty]: Start isEmpty. Operand 3397 states and 4682 transitions. [2020-10-28 00:07:18,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 00:07:18,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:07:18,959 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 00:07:18,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 00:07:18,959 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:07:18,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:07:18,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1912849547, now seen corresponding path program 1 times [2020-10-28 00:07:18,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:07:18,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [484520880] [2020-10-28 00:07:18,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:07:18,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:18,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:19,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:19,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:19,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:19,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:19,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:19,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:22,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:23,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:23,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 00:07:23,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:07:23,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 00:07:23,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:23,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:07:23,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 00:07:23,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 00:07:23,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:24,212 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 00:07:24,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:07:24,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:24,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:24,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:24,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:07:24,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:07:24,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 00:07:24,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:24,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:07:24,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:07:24,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:07:24,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:24,248 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:07:24,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [484520880] [2020-10-28 00:07:24,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:07:24,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:07:24,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669761807] [2020-10-28 00:07:24,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:07:24,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:07:24,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:07:24,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:07:24,251 INFO L87 Difference]: Start difference. First operand 3397 states and 4682 transitions. Second operand 4 states. [2020-10-28 00:07:24,427 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 00:07:25,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:07:25,139 INFO L93 Difference]: Finished difference Result 5201 states and 7144 transitions. [2020-10-28 00:07:25,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:07:25,139 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-28 00:07:25,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:07:25,155 INFO L225 Difference]: With dead ends: 5201 [2020-10-28 00:07:25,156 INFO L226 Difference]: Without dead ends: 3569 [2020-10-28 00:07:25,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:07:25,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3569 states. [2020-10-28 00:07:25,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3569 to 3440. [2020-10-28 00:07:25,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3440 states. [2020-10-28 00:07:25,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3440 states to 3440 states and 4647 transitions. [2020-10-28 00:07:25,491 INFO L78 Accepts]: Start accepts. Automaton has 3440 states and 4647 transitions. Word has length 68 [2020-10-28 00:07:25,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:07:25,492 INFO L481 AbstractCegarLoop]: Abstraction has 3440 states and 4647 transitions. [2020-10-28 00:07:25,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:07:25,492 INFO L276 IsEmpty]: Start isEmpty. Operand 3440 states and 4647 transitions. [2020-10-28 00:07:25,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 00:07:25,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:07:25,500 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 00:07:25,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 00:07:25,500 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:07:25,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:07:25,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1587772813, now seen corresponding path program 1 times [2020-10-28 00:07:25,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:07:25,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602414961] [2020-10-28 00:07:25,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:07:25,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:25,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:25,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:25,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:25,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:25,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:27,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:30,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:30,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 00:07:30,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:07:30,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 00:07:30,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:30,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:07:30,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 00:07:30,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 00:07:30,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 00:07:30,817 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 00:07:30,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:07:30,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:30,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:30,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:30,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:07:30,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:07:30,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:07:30,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:30,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:07:30,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:07:30,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:07:30,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:30,853 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:07:30,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602414961] [2020-10-28 00:07:30,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:07:30,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:07:30,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213072544] [2020-10-28 00:07:30,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:07:30,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:07:30,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:07:30,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:07:30,858 INFO L87 Difference]: Start difference. First operand 3440 states and 4647 transitions. Second operand 4 states. [2020-10-28 00:07:31,050 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 00:07:31,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:07:31,756 INFO L93 Difference]: Finished difference Result 6861 states and 9252 transitions. [2020-10-28 00:07:31,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:07:31,757 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-28 00:07:31,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:07:31,778 INFO L225 Difference]: With dead ends: 6861 [2020-10-28 00:07:31,778 INFO L226 Difference]: Without dead ends: 4462 [2020-10-28 00:07:31,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:07:31,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4462 states. [2020-10-28 00:07:32,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4462 to 4417. [2020-10-28 00:07:32,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4417 states. [2020-10-28 00:07:32,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4417 states to 4417 states and 5908 transitions. [2020-10-28 00:07:32,209 INFO L78 Accepts]: Start accepts. Automaton has 4417 states and 5908 transitions. Word has length 68 [2020-10-28 00:07:32,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:07:32,210 INFO L481 AbstractCegarLoop]: Abstraction has 4417 states and 5908 transitions. [2020-10-28 00:07:32,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:07:32,210 INFO L276 IsEmpty]: Start isEmpty. Operand 4417 states and 5908 transitions. [2020-10-28 00:07:32,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 00:07:32,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:07:32,212 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 00:07:32,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 00:07:32,213 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:07:32,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:07:32,214 INFO L82 PathProgramCache]: Analyzing trace with hash -449520702, now seen corresponding path program 1 times [2020-10-28 00:07:32,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:07:32,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1570948268] [2020-10-28 00:07:32,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:07:32,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:32,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:32,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:32,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:32,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:32,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:33,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:34,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:37,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:37,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 00:07:37,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:07:37,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 00:07:37,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:37,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:07:37,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:07:37,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 00:07:37,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:37,465 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 00:07:37,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:07:37,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:37,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:37,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:37,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:07:37,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:07:37,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 00:07:37,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:37,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:07:37,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:07:37,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:07:37,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:37,504 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:07:37,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1570948268] [2020-10-28 00:07:37,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:07:37,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:07:37,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131587960] [2020-10-28 00:07:37,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:07:37,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:07:37,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:07:37,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:07:37,507 INFO L87 Difference]: Start difference. First operand 4417 states and 5908 transitions. Second operand 6 states. [2020-10-28 00:07:38,387 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-28 00:07:38,607 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-28 00:07:39,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:07:39,417 INFO L93 Difference]: Finished difference Result 14466 states and 19357 transitions. [2020-10-28 00:07:39,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:07:39,418 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2020-10-28 00:07:39,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:07:39,449 INFO L225 Difference]: With dead ends: 14466 [2020-10-28 00:07:39,450 INFO L226 Difference]: Without dead ends: 10098 [2020-10-28 00:07:39,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:07:39,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10098 states. [2020-10-28 00:07:40,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10098 to 5845. [2020-10-28 00:07:40,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5845 states. [2020-10-28 00:07:40,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5845 states to 5845 states and 7708 transitions. [2020-10-28 00:07:40,031 INFO L78 Accepts]: Start accepts. Automaton has 5845 states and 7708 transitions. Word has length 68 [2020-10-28 00:07:40,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:07:40,031 INFO L481 AbstractCegarLoop]: Abstraction has 5845 states and 7708 transitions. [2020-10-28 00:07:40,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:07:40,031 INFO L276 IsEmpty]: Start isEmpty. Operand 5845 states and 7708 transitions. [2020-10-28 00:07:40,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 00:07:40,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:07:40,034 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 00:07:40,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 00:07:40,035 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:07:40,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:07:40,035 INFO L82 PathProgramCache]: Analyzing trace with hash -396251986, now seen corresponding path program 1 times [2020-10-28 00:07:40,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:07:40,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1278502500] [2020-10-28 00:07:40,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:07:40,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:40,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:40,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:40,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:40,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:40,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:40,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:40,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:42,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:45,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:45,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 00:07:45,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:07:45,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 00:07:45,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:45,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:07:45,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 00:07:45,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 00:07:45,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:07:45,278 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 00:07:45,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:07:45,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:45,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:45,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:45,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:07:45,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:07:45,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:07:45,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:45,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:07:45,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:07:45,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:07:45,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:45,327 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:07:45,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1278502500] [2020-10-28 00:07:45,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:07:45,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:07:45,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933741594] [2020-10-28 00:07:45,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:07:45,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:07:45,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:07:45,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:07:45,329 INFO L87 Difference]: Start difference. First operand 5845 states and 7708 transitions. Second operand 4 states. [2020-10-28 00:07:45,573 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 00:07:46,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:07:46,433 INFO L93 Difference]: Finished difference Result 11856 states and 15585 transitions. [2020-10-28 00:07:46,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:07:46,434 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-10-28 00:07:46,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:07:46,452 INFO L225 Difference]: With dead ends: 11856 [2020-10-28 00:07:46,452 INFO L226 Difference]: Without dead ends: 7587 [2020-10-28 00:07:46,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:07:46,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7587 states. [2020-10-28 00:07:47,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7587 to 7515. [2020-10-28 00:07:47,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7515 states. [2020-10-28 00:07:47,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7515 states to 7515 states and 9784 transitions. [2020-10-28 00:07:47,103 INFO L78 Accepts]: Start accepts. Automaton has 7515 states and 9784 transitions. Word has length 69 [2020-10-28 00:07:47,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:07:47,103 INFO L481 AbstractCegarLoop]: Abstraction has 7515 states and 9784 transitions. [2020-10-28 00:07:47,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:07:47,103 INFO L276 IsEmpty]: Start isEmpty. Operand 7515 states and 9784 transitions. [2020-10-28 00:07:47,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 00:07:47,106 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:07:47,107 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 00:07:47,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 00:07:47,107 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:07:47,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:07:47,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1808915923, now seen corresponding path program 1 times [2020-10-28 00:07:47,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:07:47,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1483296971] [2020-10-28 00:07:47,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:07:47,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:47,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:47,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:47,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:47,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:47,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:49,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:49,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 00:07:49,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:07:49,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1938 [2020-10-28 00:07:49,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:49,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:07:49,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:07:49,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 00:07:49,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:49,254 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 00:07:49,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:07:49,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:49,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:49,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:49,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:07:49,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:07:49,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 00:07:49,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:49,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:07:49,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:07:49,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:07:49,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:49,284 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:07:49,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1483296971] [2020-10-28 00:07:49,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:07:49,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:07:49,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80772729] [2020-10-28 00:07:49,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:07:49,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:07:49,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:07:49,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:07:49,287 INFO L87 Difference]: Start difference. First operand 7515 states and 9784 transitions. Second operand 6 states. [2020-10-28 00:07:50,029 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-28 00:07:50,246 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-28 00:07:50,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:07:50,997 INFO L93 Difference]: Finished difference Result 19134 states and 24803 transitions. [2020-10-28 00:07:50,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:07:50,997 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-10-28 00:07:50,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:07:51,024 INFO L225 Difference]: With dead ends: 19134 [2020-10-28 00:07:51,024 INFO L226 Difference]: Without dead ends: 11724 [2020-10-28 00:07:51,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:07:51,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11724 states. [2020-10-28 00:07:51,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11724 to 7831. [2020-10-28 00:07:51,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7831 states. [2020-10-28 00:07:51,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7831 states to 7831 states and 9937 transitions. [2020-10-28 00:07:51,722 INFO L78 Accepts]: Start accepts. Automaton has 7831 states and 9937 transitions. Word has length 69 [2020-10-28 00:07:51,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:07:51,723 INFO L481 AbstractCegarLoop]: Abstraction has 7831 states and 9937 transitions. [2020-10-28 00:07:51,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:07:51,723 INFO L276 IsEmpty]: Start isEmpty. Operand 7831 states and 9937 transitions. [2020-10-28 00:07:51,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 00:07:51,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:07:51,726 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 00:07:51,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 00:07:51,726 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:07:51,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:07:51,726 INFO L82 PathProgramCache]: Analyzing trace with hash 508643769, now seen corresponding path program 1 times [2020-10-28 00:07:51,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:07:51,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527523750] [2020-10-28 00:07:51,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:07:51,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:51,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:51,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:51,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:51,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:52,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:52,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:52,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:52,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:53,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:53,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:53,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:53,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:53,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:53,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:53,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:53,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:55,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:55,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:55,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:56,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:56,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 00:07:56,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-28 00:07:56,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 00:07:56,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:56,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 00:07:56,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:07:56,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 00:07:56,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:57,203 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 00:07:57,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:07:57,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:57,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:57,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:57,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:07:57,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:07:57,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 00:07:57,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:57,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:07:57,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:07:57,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:07:57,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:57,236 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:07:57,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527523750] [2020-10-28 00:07:57,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:07:57,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 00:07:57,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114036004] [2020-10-28 00:07:57,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 00:07:57,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:07:57,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 00:07:57,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:07:57,238 INFO L87 Difference]: Start difference. First operand 7831 states and 9937 transitions. Second operand 11 states. [2020-10-28 00:07:57,460 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-28 00:07:59,283 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-28 00:07:59,542 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-28 00:07:59,895 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-28 00:08:01,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:08:01,699 INFO L93 Difference]: Finished difference Result 28823 states and 36052 transitions. [2020-10-28 00:08:01,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-28 00:08:01,700 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 70 [2020-10-28 00:08:01,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:08:01,755 INFO L225 Difference]: With dead ends: 28823 [2020-10-28 00:08:01,755 INFO L226 Difference]: Without dead ends: 24462 [2020-10-28 00:08:01,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=411, Invalid=1569, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 00:08:01,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24462 states. [2020-10-28 00:08:02,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24462 to 8533. [2020-10-28 00:08:02,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8533 states. [2020-10-28 00:08:02,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8533 states to 8533 states and 10814 transitions. [2020-10-28 00:08:02,828 INFO L78 Accepts]: Start accepts. Automaton has 8533 states and 10814 transitions. Word has length 70 [2020-10-28 00:08:02,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:08:02,829 INFO L481 AbstractCegarLoop]: Abstraction has 8533 states and 10814 transitions. [2020-10-28 00:08:02,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 00:08:02,829 INFO L276 IsEmpty]: Start isEmpty. Operand 8533 states and 10814 transitions. [2020-10-28 00:08:02,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 00:08:02,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:08:02,832 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 00:08:02,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 00:08:02,832 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:08:02,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:08:02,833 INFO L82 PathProgramCache]: Analyzing trace with hash -558901644, now seen corresponding path program 1 times [2020-10-28 00:08:02,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:08:02,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1341838123] [2020-10-28 00:08:02,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:08:02,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:02,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:02,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:02,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:03,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:03,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:03,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:03,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:04,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:04,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:04,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:05,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:07,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:07,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 00:08:07,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 00:08:07,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 00:08:07,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:07,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 00:08:07,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 00:08:07,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 00:08:07,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:08,062 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 25 [2020-10-28 00:08:08,320 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 00:08:08,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:08:08,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:08,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:08,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:08,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:08:08,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:08:08,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 00:08:08,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:08,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:08:08,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:08:08,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:08:08,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:08,355 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:08:08,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1341838123] [2020-10-28 00:08:08,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:08:08,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 00:08:08,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556379402] [2020-10-28 00:08:08,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 00:08:08,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:08:08,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 00:08:08,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:08:08,357 INFO L87 Difference]: Start difference. First operand 8533 states and 10814 transitions. Second operand 12 states. [2020-10-28 00:08:08,620 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-28 00:08:09,538 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2020-10-28 00:08:12,227 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 00:08:12,492 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-28 00:08:12,784 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-28 00:08:13,324 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 00:08:17,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:08:17,285 INFO L93 Difference]: Finished difference Result 30077 states and 37679 transitions. [2020-10-28 00:08:17,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2020-10-28 00:08:17,286 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 70 [2020-10-28 00:08:17,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:08:17,318 INFO L225 Difference]: With dead ends: 30077 [2020-10-28 00:08:17,318 INFO L226 Difference]: Without dead ends: 24496 [2020-10-28 00:08:17,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3501 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1252, Invalid=7490, Unknown=0, NotChecked=0, Total=8742 [2020-10-28 00:08:17,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24496 states. [2020-10-28 00:08:19,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24496 to 13195. [2020-10-28 00:08:19,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13195 states. [2020-10-28 00:08:19,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13195 states to 13195 states and 16701 transitions. [2020-10-28 00:08:19,200 INFO L78 Accepts]: Start accepts. Automaton has 13195 states and 16701 transitions. Word has length 70 [2020-10-28 00:08:19,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:08:19,200 INFO L481 AbstractCegarLoop]: Abstraction has 13195 states and 16701 transitions. [2020-10-28 00:08:19,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 00:08:19,200 INFO L276 IsEmpty]: Start isEmpty. Operand 13195 states and 16701 transitions. [2020-10-28 00:08:19,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 00:08:19,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:08:19,203 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 00:08:19,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 00:08:19,203 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:08:19,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:08:19,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1885951695, now seen corresponding path program 1 times [2020-10-28 00:08:19,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:08:19,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1038277343] [2020-10-28 00:08:19,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:08:19,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:19,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:19,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:19,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:19,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:19,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:20,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:20,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:24,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:24,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 00:08:24,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:08:24,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 00:08:24,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:24,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:08:24,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 00:08:24,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 00:08:24,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:24,425 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 00:08:24,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:08:24,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:24,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:24,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:24,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:08:24,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:08:24,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 00:08:24,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:24,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:08:24,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:08:24,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:08:24,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:24,447 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:08:24,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1038277343] [2020-10-28 00:08:24,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:08:24,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:08:24,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240975872] [2020-10-28 00:08:24,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:08:24,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:08:24,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:08:24,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:08:24,449 INFO L87 Difference]: Start difference. First operand 13195 states and 16701 transitions. Second operand 6 states. [2020-10-28 00:08:24,635 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-28 00:08:25,703 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-28 00:08:26,056 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-28 00:08:29,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:08:29,138 INFO L93 Difference]: Finished difference Result 34737 states and 44110 transitions. [2020-10-28 00:08:29,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 00:08:29,138 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-10-28 00:08:29,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:08:29,170 INFO L225 Difference]: With dead ends: 34737 [2020-10-28 00:08:29,170 INFO L226 Difference]: Without dead ends: 27902 [2020-10-28 00:08:29,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 00:08:29,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27902 states. [2020-10-28 00:08:31,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27902 to 20401. [2020-10-28 00:08:31,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20401 states. [2020-10-28 00:08:31,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20401 states to 20401 states and 25774 transitions. [2020-10-28 00:08:31,808 INFO L78 Accepts]: Start accepts. Automaton has 20401 states and 25774 transitions. Word has length 70 [2020-10-28 00:08:31,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:08:31,809 INFO L481 AbstractCegarLoop]: Abstraction has 20401 states and 25774 transitions. [2020-10-28 00:08:31,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:08:31,809 INFO L276 IsEmpty]: Start isEmpty. Operand 20401 states and 25774 transitions. [2020-10-28 00:08:31,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 00:08:31,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:08:31,814 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 00:08:31,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 00:08:31,814 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:08:31,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:08:31,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1282075611, now seen corresponding path program 1 times [2020-10-28 00:08:31,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:08:31,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309751033] [2020-10-28 00:08:31,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:08:31,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:31,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:31,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:31,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:32,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:32,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:32,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:32,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:32,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:32,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:33,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:33,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:33,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:35,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:36,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:36,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 00:08:36,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 00:08:36,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 00:08:36,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:36,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 00:08:36,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:08:36,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 00:08:36,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:37,165 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 00:08:37,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:08:37,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:37,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:37,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:37,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:08:37,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:08:37,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:08:37,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:37,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:08:37,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:08:37,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:08:37,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:37,201 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:08:37,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1309751033] [2020-10-28 00:08:37,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:08:37,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 00:08:37,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915222718] [2020-10-28 00:08:37,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 00:08:37,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:08:37,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 00:08:37,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:08:37,203 INFO L87 Difference]: Start difference. First operand 20401 states and 25774 transitions. Second operand 11 states. [2020-10-28 00:08:37,425 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-28 00:08:39,336 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-28 00:08:41,357 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-28 00:08:46,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:08:46,475 INFO L93 Difference]: Finished difference Result 67913 states and 85612 transitions. [2020-10-28 00:08:46,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-28 00:08:46,475 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 71 [2020-10-28 00:08:46,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:08:46,558 INFO L225 Difference]: With dead ends: 67913 [2020-10-28 00:08:46,559 INFO L226 Difference]: Without dead ends: 53342 [2020-10-28 00:08:46,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=433, Invalid=1547, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 00:08:46,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53342 states. [2020-10-28 00:08:49,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53342 to 24269. [2020-10-28 00:08:49,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24269 states. [2020-10-28 00:08:49,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24269 states to 24269 states and 30707 transitions. [2020-10-28 00:08:49,887 INFO L78 Accepts]: Start accepts. Automaton has 24269 states and 30707 transitions. Word has length 71 [2020-10-28 00:08:49,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:08:49,887 INFO L481 AbstractCegarLoop]: Abstraction has 24269 states and 30707 transitions. [2020-10-28 00:08:49,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 00:08:49,887 INFO L276 IsEmpty]: Start isEmpty. Operand 24269 states and 30707 transitions. [2020-10-28 00:08:49,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 00:08:49,893 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:08:49,893 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 00:08:49,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 00:08:49,894 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:08:49,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:08:49,894 INFO L82 PathProgramCache]: Analyzing trace with hash -762142501, now seen corresponding path program 1 times [2020-10-28 00:08:49,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:08:49,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1496821955] [2020-10-28 00:08:49,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:08:49,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:49,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:50,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:50,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:50,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:50,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:50,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:52,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:54,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:54,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 00:08:54,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:08:54,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4147 [2020-10-28 00:08:54,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:54,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:08:54,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 00:08:54,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 00:08:54,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:54,253 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 00:08:54,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:08:54,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:54,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:54,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:54,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:08:54,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:08:54,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:08:54,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:54,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:08:54,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:08:54,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:08:54,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:54,286 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 00:08:54,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1496821955] [2020-10-28 00:08:54,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:08:54,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:08:54,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578047335] [2020-10-28 00:08:54,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:08:54,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:08:54,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:08:54,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:08:54,288 INFO L87 Difference]: Start difference. First operand 24269 states and 30707 transitions. Second operand 6 states. [2020-10-28 00:08:54,488 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-28 00:08:55,306 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-28 00:08:57,847 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 00:08:58,042 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-28 00:09:01,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:09:01,420 INFO L93 Difference]: Finished difference Result 62531 states and 80667 transitions. [2020-10-28 00:09:01,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:09:01,421 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-28 00:09:01,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:09:01,476 INFO L225 Difference]: With dead ends: 62531 [2020-10-28 00:09:01,476 INFO L226 Difference]: Without dead ends: 52029 [2020-10-28 00:09:01,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-28 00:09:01,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52029 states. [2020-10-28 00:09:06,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52029 to 36768. [2020-10-28 00:09:06,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36768 states. [2020-10-28 00:09:06,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36768 states to 36768 states and 46441 transitions. [2020-10-28 00:09:06,486 INFO L78 Accepts]: Start accepts. Automaton has 36768 states and 46441 transitions. Word has length 71 [2020-10-28 00:09:06,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:09:06,487 INFO L481 AbstractCegarLoop]: Abstraction has 36768 states and 46441 transitions. [2020-10-28 00:09:06,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:09:06,487 INFO L276 IsEmpty]: Start isEmpty. Operand 36768 states and 46441 transitions. [2020-10-28 00:09:06,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 00:09:06,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:09:06,493 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 00:09:06,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 00:09:06,493 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:09:06,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:09:06,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1551350710, now seen corresponding path program 1 times [2020-10-28 00:09:06,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:09:06,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1272278533] [2020-10-28 00:09:06,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:09:06,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:06,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:06,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:06,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:06,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:07,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:07,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:08,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:10,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:10,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 00:09:10,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:09:10,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3749 [2020-10-28 00:09:10,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:10,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:09:10,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 00:09:10,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 00:09:10,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:09:10,461 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 00:09:10,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:09:10,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:10,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:10,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:10,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:09:10,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:09:10,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 00:09:10,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:10,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:09:10,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:09:10,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:09:10,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:09:10,485 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:09:10,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1272278533] [2020-10-28 00:09:10,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:09:10,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:09:10,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035433674] [2020-10-28 00:09:10,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:09:10,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:09:10,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:09:10,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:09:10,487 INFO L87 Difference]: Start difference. First operand 36768 states and 46441 transitions. Second operand 6 states. [2020-10-28 00:09:10,691 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-28 00:09:12,073 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-28 00:09:12,491 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-28 00:09:25,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:09:25,779 INFO L93 Difference]: Finished difference Result 149345 states and 189982 transitions. [2020-10-28 00:09:25,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 00:09:25,779 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-28 00:09:25,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:09:25,942 INFO L225 Difference]: With dead ends: 149345 [2020-10-28 00:09:25,943 INFO L226 Difference]: Without dead ends: 113939 [2020-10-28 00:09:25,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 00:09:26,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113939 states. [2020-10-28 00:09:39,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113939 to 98889. [2020-10-28 00:09:39,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98889 states. [2020-10-28 00:09:39,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98889 states to 98889 states and 125720 transitions. [2020-10-28 00:09:39,205 INFO L78 Accepts]: Start accepts. Automaton has 98889 states and 125720 transitions. Word has length 71 [2020-10-28 00:09:39,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:09:39,205 INFO L481 AbstractCegarLoop]: Abstraction has 98889 states and 125720 transitions. [2020-10-28 00:09:39,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:09:39,206 INFO L276 IsEmpty]: Start isEmpty. Operand 98889 states and 125720 transitions. [2020-10-28 00:09:39,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 00:09:39,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:09:39,213 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 00:09:39,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 00:09:39,214 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:09:39,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:09:39,214 INFO L82 PathProgramCache]: Analyzing trace with hash 34128837, now seen corresponding path program 1 times [2020-10-28 00:09:39,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:09:39,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1186804574] [2020-10-28 00:09:39,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:09:39,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:39,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:39,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:39,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:39,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:40,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:40,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:40,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:40,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:41,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:41,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:42,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:44,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:44,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 00:09:44,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 00:09:44,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 00:09:44,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:44,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 00:09:44,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 00:09:44,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 00:09:44,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:09:44,595 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 27 [2020-10-28 00:09:44,883 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 00:09:44,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:09:44,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:44,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:44,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:44,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:09:44,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:09:44,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:09:44,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:44,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:09:44,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:09:44,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:09:44,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:09:44,917 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:09:44,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1186804574] [2020-10-28 00:09:44,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:09:44,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 00:09:44,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400516011] [2020-10-28 00:09:44,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 00:09:44,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:09:44,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 00:09:44,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:09:44,919 INFO L87 Difference]: Start difference. First operand 98889 states and 125720 transitions. Second operand 12 states. [2020-10-28 00:09:45,266 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-28 00:09:47,579 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 00:09:48,002 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-28 00:09:48,268 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-28 00:09:52,457 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 00:10:12,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:10:12,760 INFO L93 Difference]: Finished difference Result 208773 states and 263061 transitions. [2020-10-28 00:10:12,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-28 00:10:12,761 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 71 [2020-10-28 00:10:12,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:10:13,067 INFO L225 Difference]: With dead ends: 208773 [2020-10-28 00:10:13,067 INFO L226 Difference]: Without dead ends: 165838 [2020-10-28 00:10:13,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=427, Invalid=2225, Unknown=0, NotChecked=0, Total=2652 [2020-10-28 00:10:13,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165838 states.