/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:18:12,120 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:18:12,127 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:18:12,169 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:18:12,170 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:18:12,171 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:18:12,173 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:18:12,175 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:18:12,177 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:18:12,178 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:18:12,180 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:18:12,181 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:18:12,182 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:18:12,183 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:18:12,185 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:18:12,186 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:18:12,187 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:18:12,188 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:18:12,190 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:18:12,193 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:18:12,195 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:18:12,197 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:18:12,198 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:18:12,199 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:18:12,203 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:18:12,203 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:18:12,204 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:18:12,205 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:18:12,206 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:18:12,207 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:18:12,207 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:18:12,208 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:18:12,209 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:18:12,211 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:18:12,212 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:18:12,234 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:18:12,238 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:18:12,238 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:18:12,239 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:18:12,240 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:18:12,241 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:18:12,242 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 13:18:12,272 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:18:12,273 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:18:12,274 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:18:12,275 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:18:12,275 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:18:12,275 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:18:12,276 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:18:12,276 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:18:12,276 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:18:12,276 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:18:12,277 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:18:12,277 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:18:12,277 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:18:12,277 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:18:12,278 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:18:12,278 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:18:12,278 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:18:12,279 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:18:12,279 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:18:12,279 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:18:12,280 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:18:12,280 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:18:12,280 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:18:12,280 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:18:12,281 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:18:12,281 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:18:12,281 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:18:12,282 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:18:12,282 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:18:12,282 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:18:12,693 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:18:12,734 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:18:12,737 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:18:12,738 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:18:12,739 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:18:12,740 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-29 13:18:12,828 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1c659dcdf/7b554acc374e469da52ded364bf8ef68/FLAG9ef799737 [2020-10-29 13:18:13,489 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:18:13,490 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-29 13:18:13,510 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1c659dcdf/7b554acc374e469da52ded364bf8ef68/FLAG9ef799737 [2020-10-29 13:18:13,811 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1c659dcdf/7b554acc374e469da52ded364bf8ef68 [2020-10-29 13:18:13,816 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:18:13,825 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:18:13,828 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:18:13,828 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:18:13,832 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:18:13,833 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:18:13" (1/1) ... [2020-10-29 13:18:13,839 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cf859b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:18:13, skipping insertion in model container [2020-10-29 13:18:13,840 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:18:13" (1/1) ... [2020-10-29 13:18:13,848 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:18:13,921 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:18:14,242 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:18:14,257 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:18:14,369 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:18:14,405 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:18:14,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:18:14 WrapperNode [2020-10-29 13:18:14,407 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:18:14,408 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:18:14,408 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:18:14,409 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:18:14,420 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:18:14" (1/1) ... [2020-10-29 13:18:14,421 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:18:14" (1/1) ... [2020-10-29 13:18:14,433 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:18:14" (1/1) ... [2020-10-29 13:18:14,434 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:18:14" (1/1) ... [2020-10-29 13:18:14,450 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:18:14" (1/1) ... [2020-10-29 13:18:14,461 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:18:14" (1/1) ... [2020-10-29 13:18:14,465 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:18:14" (1/1) ... [2020-10-29 13:18:14,471 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:18:14,472 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:18:14,472 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:18:14,472 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:18:14,473 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:18:14" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:18:14,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:18:14,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:18:14,548 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:18:14,548 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:18:14,548 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:18:14,548 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:18:14,548 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:18:14,549 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:18:14,549 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:18:14,549 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:18:14,549 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:18:14,549 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:18:14,549 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:18:14,549 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:18:14,550 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:18:14,550 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:18:14,550 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:18:14,550 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:18:14,550 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-29 13:18:14,550 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:18:14,551 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:18:14,551 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:18:14,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:18:14,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:18:14,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:18:14,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:18:14,551 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:18:14,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:18:15,490 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:18:15,491 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:18:15,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:18:15 BoogieIcfgContainer [2020-10-29 13:18:15,494 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:18:15,497 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:18:15,497 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:18:15,502 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:18:15,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:18:13" (1/3) ... [2020-10-29 13:18:15,504 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dc8b4d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:18:15, skipping insertion in model container [2020-10-29 13:18:15,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:18:14" (2/3) ... [2020-10-29 13:18:15,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dc8b4d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:18:15, skipping insertion in model container [2020-10-29 13:18:15,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:18:15" (3/3) ... [2020-10-29 13:18:15,507 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-29 13:18:15,520 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:18:15,526 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:18:15,541 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:18:15,588 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:18:15,588 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:18:15,589 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:18:15,589 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:18:15,589 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:18:15,589 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:18:15,589 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:18:15,589 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:18:15,618 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states. [2020-10-29 13:18:15,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 13:18:15,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:18:15,630 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:18:15,631 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:18:15,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:18:15,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1557269899, now seen corresponding path program 1 times [2020-10-29 13:18:15,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:18:15,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145967762] [2020-10-29 13:18:15,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:18:15,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:16,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:16,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:16,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:16,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:16,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:16,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:16,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:17,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:17,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:20,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:20,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 13:18:20,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:18:20,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-29 13:18:20,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:20,984 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:20,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:18:20,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:18:20,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-29 13:18:20,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 13:18:21,357 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 13:18:21,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:18:21,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:21,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:21,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:21,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:18:21,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:18:21,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-29 13:18:21,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:21,431 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:21,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:18:21,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:18:21,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:18:21,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:18:21,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:18:21,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145967762] [2020-10-29 13:18:21,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:18:21,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:18:21,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201299747] [2020-10-29 13:18:21,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:18:21,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:18:21,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:18:21,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:18:21,518 INFO L87 Difference]: Start difference. First operand 132 states. Second operand 6 states. [2020-10-29 13:18:21,908 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:18:22,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:18:22,777 INFO L93 Difference]: Finished difference Result 223 states and 363 transitions. [2020-10-29 13:18:22,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 13:18:22,780 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-10-29 13:18:22,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:18:22,793 INFO L225 Difference]: With dead ends: 223 [2020-10-29 13:18:22,793 INFO L226 Difference]: Without dead ends: 125 [2020-10-29 13:18:22,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:18:22,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-29 13:18:22,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2020-10-29 13:18:22,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-29 13:18:22,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 168 transitions. [2020-10-29 13:18:22,862 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 168 transitions. Word has length 67 [2020-10-29 13:18:22,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:18:22,863 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 168 transitions. [2020-10-29 13:18:22,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:18:22,863 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 168 transitions. [2020-10-29 13:18:22,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-29 13:18:22,866 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:18:22,866 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:18:22,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:18:22,867 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:18:22,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:18:22,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1779319041, now seen corresponding path program 1 times [2020-10-29 13:18:22,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:18:22,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198548577] [2020-10-29 13:18:22,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:18:22,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:22,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:22,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:23,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:23,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:23,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:23,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:23,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:23,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:26,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:26,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:27,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:27,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:27,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:27,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:27,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:27,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 13:18:27,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 13:18:27,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-29 13:18:27,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:27,924 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:27,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:18:27,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:18:27,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 13:18:27,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:18:28,253 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 13:18:28,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:18:28,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:28,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:28,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:28,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:18:28,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:18:28,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-29 13:18:28,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:28,299 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:28,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:18:28,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:18:28,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:18:28,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:18:28,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:18:28,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198548577] [2020-10-29 13:18:28,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:18:28,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:18:28,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556518905] [2020-10-29 13:18:28,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:18:28,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:18:28,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:18:28,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:18:28,349 INFO L87 Difference]: Start difference. First operand 125 states and 168 transitions. Second operand 6 states. [2020-10-29 13:18:28,698 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:18:29,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:18:29,321 INFO L93 Difference]: Finished difference Result 208 states and 291 transitions. [2020-10-29 13:18:29,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 13:18:29,322 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2020-10-29 13:18:29,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:18:29,324 INFO L225 Difference]: With dead ends: 208 [2020-10-29 13:18:29,324 INFO L226 Difference]: Without dead ends: 125 [2020-10-29 13:18:29,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:18:29,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-29 13:18:29,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2020-10-29 13:18:29,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-29 13:18:29,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 166 transitions. [2020-10-29 13:18:29,357 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 166 transitions. Word has length 68 [2020-10-29 13:18:29,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:18:29,359 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 166 transitions. [2020-10-29 13:18:29,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:18:29,359 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 166 transitions. [2020-10-29 13:18:29,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-29 13:18:29,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:18:29,374 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:18:29,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:18:29,374 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:18:29,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:18:29,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1932314842, now seen corresponding path program 1 times [2020-10-29 13:18:29,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:18:29,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [441260336] [2020-10-29 13:18:29,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:18:29,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:29,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:29,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:29,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:29,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:29,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:30,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:30,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:30,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:30,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:30,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:34,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:34,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-29 13:18:34,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 13:18:34,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 13:18:34,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:34,434 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:34,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:18:34,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:18:34,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-29 13:18:34,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:18:34,705 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 13:18:34,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:18:34,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:34,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:34,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:34,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:18:34,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:18:34,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 13:18:34,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:34,725 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:34,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:18:34,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:18:34,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:18:34,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:18:34,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:18:34,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [441260336] [2020-10-29 13:18:34,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:18:34,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:18:34,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751959052] [2020-10-29 13:18:34,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:18:34,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:18:34,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:18:34,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:18:34,750 INFO L87 Difference]: Start difference. First operand 125 states and 166 transitions. Second operand 7 states. [2020-10-29 13:18:35,044 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-29 13:18:35,729 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-29 13:18:35,999 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:18:36,253 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-29 13:18:36,593 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-29 13:18:36,843 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:18:37,080 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-29 13:18:37,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:18:37,708 INFO L93 Difference]: Finished difference Result 575 states and 850 transitions. [2020-10-29 13:18:37,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 13:18:37,709 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-10-29 13:18:37,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:18:37,720 INFO L225 Difference]: With dead ends: 575 [2020-10-29 13:18:37,720 INFO L226 Difference]: Without dead ends: 523 [2020-10-29 13:18:37,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2020-10-29 13:18:37,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2020-10-29 13:18:37,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 190. [2020-10-29 13:18:37,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-10-29 13:18:37,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 266 transitions. [2020-10-29 13:18:37,762 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 266 transitions. Word has length 69 [2020-10-29 13:18:37,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:18:37,763 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 266 transitions. [2020-10-29 13:18:37,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:18:37,763 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 266 transitions. [2020-10-29 13:18:37,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-29 13:18:37,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:18:37,765 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:18:37,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:18:37,765 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:18:37,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:18:37,765 INFO L82 PathProgramCache]: Analyzing trace with hash -665207344, now seen corresponding path program 1 times [2020-10-29 13:18:37,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:18:37,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [314433827] [2020-10-29 13:18:37,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:18:37,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:37,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:37,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:37,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:38,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:38,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:39,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:40,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:40,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:40,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:40,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:41,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:42,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:42,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:42,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-29 13:18:42,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 13:18:42,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 13:18:42,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:42,802 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:42,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:18:42,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:18:42,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-29 13:18:42,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:18:43,041 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 13:18:43,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:18:43,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:43,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:43,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:43,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:18:43,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:18:43,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 13:18:43,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:43,065 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:43,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:18:43,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:18:43,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:18:43,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:18:43,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:18:43,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [314433827] [2020-10-29 13:18:43,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:18:43,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:18:43,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750341167] [2020-10-29 13:18:43,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:18:43,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:18:43,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:18:43,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:18:43,091 INFO L87 Difference]: Start difference. First operand 190 states and 266 transitions. Second operand 6 states. [2020-10-29 13:18:43,315 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-29 13:18:44,260 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-29 13:18:44,476 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-29 13:18:45,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:18:45,421 INFO L93 Difference]: Finished difference Result 1160 states and 1748 transitions. [2020-10-29 13:18:45,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:18:45,422 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-29 13:18:45,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:18:45,431 INFO L225 Difference]: With dead ends: 1160 [2020-10-29 13:18:45,431 INFO L226 Difference]: Without dead ends: 1043 [2020-10-29 13:18:45,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:18:45,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2020-10-29 13:18:45,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 586. [2020-10-29 13:18:45,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 586 states. [2020-10-29 13:18:45,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 868 transitions. [2020-10-29 13:18:45,548 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 868 transitions. Word has length 71 [2020-10-29 13:18:45,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:18:45,552 INFO L481 AbstractCegarLoop]: Abstraction has 586 states and 868 transitions. [2020-10-29 13:18:45,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:18:45,553 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 868 transitions. [2020-10-29 13:18:45,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-29 13:18:45,558 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:18:45,558 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:18:45,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:18:45,558 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:18:45,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:18:45,559 INFO L82 PathProgramCache]: Analyzing trace with hash 2018340730, now seen corresponding path program 1 times [2020-10-29 13:18:45,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:18:45,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748826164] [2020-10-29 13:18:45,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:18:45,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:45,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:45,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:45,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:45,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:46,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:46,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:46,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:46,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:50,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:50,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-29 13:18:50,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:18:50,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-29 13:18:50,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:50,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:50,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:18:50,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:18:50,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-29 13:18:50,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:18:51,095 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 13:18:51,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:18:51,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:51,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:51,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:51,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:18:51,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:18:51,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:18:51,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:51,114 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:51,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:18:51,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:18:51,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:18:51,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-29 13:18:51,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:18:51,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748826164] [2020-10-29 13:18:51,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:18:51,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:18:51,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251848677] [2020-10-29 13:18:51,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:18:51,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:18:51,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:18:51,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:18:51,145 INFO L87 Difference]: Start difference. First operand 586 states and 868 transitions. Second operand 8 states. [2020-10-29 13:18:51,419 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-29 13:18:52,182 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-29 13:18:52,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:18:52,637 INFO L93 Difference]: Finished difference Result 1434 states and 2168 transitions. [2020-10-29 13:18:52,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:18:52,638 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 71 [2020-10-29 13:18:52,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:18:52,650 INFO L225 Difference]: With dead ends: 1434 [2020-10-29 13:18:52,650 INFO L226 Difference]: Without dead ends: 987 [2020-10-29 13:18:52,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-10-29 13:18:52,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2020-10-29 13:18:52,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 586. [2020-10-29 13:18:52,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 586 states. [2020-10-29 13:18:52,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 866 transitions. [2020-10-29 13:18:52,750 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 866 transitions. Word has length 71 [2020-10-29 13:18:52,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:18:52,751 INFO L481 AbstractCegarLoop]: Abstraction has 586 states and 866 transitions. [2020-10-29 13:18:52,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:18:52,751 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 866 transitions. [2020-10-29 13:18:52,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:18:52,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:18:52,754 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:18:52,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:18:52,754 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:18:52,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:18:52,755 INFO L82 PathProgramCache]: Analyzing trace with hash -616610441, now seen corresponding path program 1 times [2020-10-29 13:18:52,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:18:52,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283573761] [2020-10-29 13:18:52,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:18:52,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:52,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:52,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:52,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:53,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:53,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:53,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:53,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:53,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:54,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:54,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:55,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:55,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:56,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:57,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:57,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:57,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:18:57,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 13:18:57,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-29 13:18:57,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:57,801 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:57,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:18:57,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:18:57,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-29 13:18:57,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:18:58,029 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 24 [2020-10-29 13:18:58,276 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 13:18:58,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:18:58,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:58,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:58,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:58,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:18:58,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:18:58,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:18:58,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:58,295 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:58,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:18:58,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:18:58,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:18:58,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:18:58,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:18:58,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283573761] [2020-10-29 13:18:58,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:18:58,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:18:58,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565655400] [2020-10-29 13:18:58,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:18:58,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:18:58,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:18:58,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:18:58,325 INFO L87 Difference]: Start difference. First operand 586 states and 866 transitions. Second operand 9 states. [2020-10-29 13:18:58,616 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:19:00,375 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-29 13:19:00,662 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:19:02,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:19:02,222 INFO L93 Difference]: Finished difference Result 1457 states and 2189 transitions. [2020-10-29 13:19:02,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 13:19:02,223 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-10-29 13:19:02,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:19:02,229 INFO L225 Difference]: With dead ends: 1457 [2020-10-29 13:19:02,230 INFO L226 Difference]: Without dead ends: 1025 [2020-10-29 13:19:02,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2020-10-29 13:19:02,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2020-10-29 13:19:02,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 586. [2020-10-29 13:19:02,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 586 states. [2020-10-29 13:19:02,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 861 transitions. [2020-10-29 13:19:02,332 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 861 transitions. Word has length 72 [2020-10-29 13:19:02,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:19:02,333 INFO L481 AbstractCegarLoop]: Abstraction has 586 states and 861 transitions. [2020-10-29 13:19:02,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:19:02,333 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 861 transitions. [2020-10-29 13:19:02,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:19:02,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:19:02,334 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:19:02,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:19:02,335 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:19:02,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:19:02,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1424636538, now seen corresponding path program 1 times [2020-10-29 13:19:02,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:19:02,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816612865] [2020-10-29 13:19:02,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:19:02,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:02,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:02,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:02,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:02,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:02,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:03,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:03,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:03,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:03,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:03,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:03,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:04,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:04,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:05,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:05,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:05,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:05,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:05,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:05,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:06,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:06,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:06,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:06,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:06,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:06,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:06,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:07,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:07,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:07,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:19:07,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 27 [2020-10-29 13:19:07,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-29 13:19:07,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:07,371 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:07,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:19:07,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:19:07,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-29 13:19:07,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:07,856 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 13:19:07,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:19:07,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:07,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:07,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:07,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:19:07,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:19:07,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-29 13:19:07,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:07,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:07,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:19:07,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:19:07,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:19:07,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:19:07,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:19:07,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816612865] [2020-10-29 13:19:07,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:19:07,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:19:07,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058848790] [2020-10-29 13:19:07,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:19:07,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:19:07,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:19:07,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:19:07,927 INFO L87 Difference]: Start difference. First operand 586 states and 861 transitions. Second operand 9 states. [2020-10-29 13:19:08,308 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:19:09,197 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-29 13:19:09,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:19:09,742 INFO L93 Difference]: Finished difference Result 1444 states and 2161 transitions. [2020-10-29 13:19:09,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 13:19:09,744 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-10-29 13:19:09,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:19:09,750 INFO L225 Difference]: With dead ends: 1444 [2020-10-29 13:19:09,751 INFO L226 Difference]: Without dead ends: 1043 [2020-10-29 13:19:09,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-10-29 13:19:09,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2020-10-29 13:19:09,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 586. [2020-10-29 13:19:09,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 586 states. [2020-10-29 13:19:09,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 853 transitions. [2020-10-29 13:19:09,839 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 853 transitions. Word has length 72 [2020-10-29 13:19:09,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:19:09,840 INFO L481 AbstractCegarLoop]: Abstraction has 586 states and 853 transitions. [2020-10-29 13:19:09,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:19:09,840 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 853 transitions. [2020-10-29 13:19:09,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:19:09,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:19:09,841 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:19:09,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:19:09,842 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:19:09,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:19:09,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1762166277, now seen corresponding path program 1 times [2020-10-29 13:19:09,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:19:09,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2092429242] [2020-10-29 13:19:09,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:19:09,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:09,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:09,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:10,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:10,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:12,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:12,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:14,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:14,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:19:14,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:19:14,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 13:19:14,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:14,872 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:14,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:19:14,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-29 13:19:14,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-29 13:19:14,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:15,122 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 13:19:15,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:19:15,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:15,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:15,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:15,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:19:15,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:19:15,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:19:15,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:15,139 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:15,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:19:15,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:19:15,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:19:15,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:15,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:19:15,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2092429242] [2020-10-29 13:19:15,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:19:15,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:19:15,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635036516] [2020-10-29 13:19:15,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:19:15,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:19:15,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:19:15,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:19:15,171 INFO L87 Difference]: Start difference. First operand 586 states and 853 transitions. Second operand 6 states. [2020-10-29 13:19:15,433 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-29 13:19:16,046 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-29 13:19:16,321 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-29 13:19:16,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:19:16,784 INFO L93 Difference]: Finished difference Result 1363 states and 2039 transitions. [2020-10-29 13:19:16,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:19:16,784 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2020-10-29 13:19:16,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:19:16,790 INFO L225 Difference]: With dead ends: 1363 [2020-10-29 13:19:16,790 INFO L226 Difference]: Without dead ends: 970 [2020-10-29 13:19:16,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:19:16,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2020-10-29 13:19:16,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 964. [2020-10-29 13:19:16,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 964 states. [2020-10-29 13:19:16,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 1425 transitions. [2020-10-29 13:19:16,950 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 1425 transitions. Word has length 72 [2020-10-29 13:19:16,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:19:16,950 INFO L481 AbstractCegarLoop]: Abstraction has 964 states and 1425 transitions. [2020-10-29 13:19:16,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:19:16,951 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 1425 transitions. [2020-10-29 13:19:16,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-29 13:19:16,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:19:16,952 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:19:16,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:19:16,952 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:19:16,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:19:16,953 INFO L82 PathProgramCache]: Analyzing trace with hash -2058649276, now seen corresponding path program 1 times [2020-10-29 13:19:16,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:19:16,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1012073506] [2020-10-29 13:19:16,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:19:16,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:16,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:17,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:17,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:17,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:17,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:17,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:17,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:17,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:18,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:18,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:18,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:18,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:18,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:18,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:21,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:21,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 13:19:21,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 13:19:21,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 13:19:21,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:21,986 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:21,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 13:19:21,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:19:21,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-29 13:19:21,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:22,228 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 28 [2020-10-29 13:19:22,532 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 13:19:22,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:19:22,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:22,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:22,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:22,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:19:22,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:19:22,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 13:19:22,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:22,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:22,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:19:22,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:19:22,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:19:22,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:22,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:19:22,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1012073506] [2020-10-29 13:19:22,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:19:22,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-29 13:19:22,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015353168] [2020-10-29 13:19:22,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 13:19:22,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:19:22,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 13:19:22,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:19:22,578 INFO L87 Difference]: Start difference. First operand 964 states and 1425 transitions. Second operand 11 states. [2020-10-29 13:19:22,872 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-29 13:19:23,804 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2020-10-29 13:19:24,274 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-10-29 13:19:24,840 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-29 13:19:25,153 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-29 13:19:25,423 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-29 13:19:29,138 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:19:29,394 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-29 13:19:31,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:19:31,547 INFO L93 Difference]: Finished difference Result 20469 states and 30591 transitions. [2020-10-29 13:19:31,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-29 13:19:31,548 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 73 [2020-10-29 13:19:31,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:19:31,646 INFO L225 Difference]: With dead ends: 20469 [2020-10-29 13:19:31,647 INFO L226 Difference]: Without dead ends: 19678 [2020-10-29 13:19:31,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 897 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=486, Invalid=2270, Unknown=0, NotChecked=0, Total=2756 [2020-10-29 13:19:31,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19678 states. [2020-10-29 13:19:32,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19678 to 1933. [2020-10-29 13:19:32,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1933 states. [2020-10-29 13:19:32,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1933 states to 1933 states and 2854 transitions. [2020-10-29 13:19:32,412 INFO L78 Accepts]: Start accepts. Automaton has 1933 states and 2854 transitions. Word has length 73 [2020-10-29 13:19:32,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:19:32,412 INFO L481 AbstractCegarLoop]: Abstraction has 1933 states and 2854 transitions. [2020-10-29 13:19:32,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 13:19:32,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1933 states and 2854 transitions. [2020-10-29 13:19:32,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-29 13:19:32,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:19:32,415 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:19:32,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:19:32,415 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:19:32,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:19:32,416 INFO L82 PathProgramCache]: Analyzing trace with hash -881042643, now seen corresponding path program 1 times [2020-10-29 13:19:32,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:19:32,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628911338] [2020-10-29 13:19:32,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:19:32,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:32,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:32,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:32,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:32,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:33,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:34,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:36,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:36,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 13:19:36,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:19:36,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3667 [2020-10-29 13:19:36,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:36,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:36,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:19:36,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:19:36,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-29 13:19:36,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:36,383 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 13:19:36,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:19:36,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:36,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:36,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:36,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:19:36,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:19:36,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 13:19:36,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:36,398 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:36,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:19:36,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:19:36,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:19:36,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:36,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:19:36,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628911338] [2020-10-29 13:19:36,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:19:36,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:19:36,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219662535] [2020-10-29 13:19:36,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:19:36,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:19:36,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:19:36,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:19:36,424 INFO L87 Difference]: Start difference. First operand 1933 states and 2854 transitions. Second operand 5 states. [2020-10-29 13:19:36,705 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-29 13:19:37,323 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-29 13:19:38,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:19:38,168 INFO L93 Difference]: Finished difference Result 4827 states and 7202 transitions. [2020-10-29 13:19:38,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 13:19:38,169 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 73 [2020-10-29 13:19:38,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:19:38,178 INFO L225 Difference]: With dead ends: 4827 [2020-10-29 13:19:38,178 INFO L226 Difference]: Without dead ends: 3296 [2020-10-29 13:19:38,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:19:38,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3296 states. [2020-10-29 13:19:38,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3296 to 3293. [2020-10-29 13:19:38,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3293 states. [2020-10-29 13:19:38,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3293 states to 3293 states and 4846 transitions. [2020-10-29 13:19:38,932 INFO L78 Accepts]: Start accepts. Automaton has 3293 states and 4846 transitions. Word has length 73 [2020-10-29 13:19:38,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:19:38,932 INFO L481 AbstractCegarLoop]: Abstraction has 3293 states and 4846 transitions. [2020-10-29 13:19:38,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:19:38,933 INFO L276 IsEmpty]: Start isEmpty. Operand 3293 states and 4846 transitions. [2020-10-29 13:19:38,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-29 13:19:38,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:19:38,935 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:19:38,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 13:19:38,935 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:19:38,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:19:38,936 INFO L82 PathProgramCache]: Analyzing trace with hash 55736526, now seen corresponding path program 1 times [2020-10-29 13:19:38,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:19:38,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879492225] [2020-10-29 13:19:38,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:19:38,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:38,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:38,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:39,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:39,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:39,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:41,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:41,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 13:19:41,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:19:41,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2945 [2020-10-29 13:19:41,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:41,903 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:41,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:19:41,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:19:41,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-29 13:19:41,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:42,233 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 13:19:42,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:19:42,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:42,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:42,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:42,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:19:42,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:19:42,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 13:19:42,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:42,257 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:42,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:19:42,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:19:42,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:19:42,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:42,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:19:42,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879492225] [2020-10-29 13:19:42,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:19:42,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:19:42,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062216296] [2020-10-29 13:19:42,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:19:42,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:19:42,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:19:42,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:19:42,289 INFO L87 Difference]: Start difference. First operand 3293 states and 4846 transitions. Second operand 7 states. [2020-10-29 13:19:42,604 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:19:43,316 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-29 13:19:43,575 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:19:43,836 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-29 13:19:44,179 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:19:44,422 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-29 13:19:44,721 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-29 13:19:46,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:19:46,942 INFO L93 Difference]: Finished difference Result 12505 states and 18591 transitions. [2020-10-29 13:19:46,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 13:19:46,943 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 73 [2020-10-29 13:19:46,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:19:46,963 INFO L225 Difference]: With dead ends: 12505 [2020-10-29 13:19:46,963 INFO L226 Difference]: Without dead ends: 9614 [2020-10-29 13:19:46,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2020-10-29 13:19:46,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9614 states. [2020-10-29 13:19:47,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9614 to 3293. [2020-10-29 13:19:47,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3293 states. [2020-10-29 13:19:47,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3293 states to 3293 states and 4830 transitions. [2020-10-29 13:19:47,743 INFO L78 Accepts]: Start accepts. Automaton has 3293 states and 4830 transitions. Word has length 73 [2020-10-29 13:19:47,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:19:47,744 INFO L481 AbstractCegarLoop]: Abstraction has 3293 states and 4830 transitions. [2020-10-29 13:19:47,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:19:47,744 INFO L276 IsEmpty]: Start isEmpty. Operand 3293 states and 4830 transitions. [2020-10-29 13:19:47,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-29 13:19:47,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:19:47,746 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:19:47,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 13:19:47,746 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:19:47,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:19:47,747 INFO L82 PathProgramCache]: Analyzing trace with hash 954998575, now seen corresponding path program 1 times [2020-10-29 13:19:47,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:19:47,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [113930041] [2020-10-29 13:19:47,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:19:47,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:47,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:47,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:47,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:48,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:48,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:48,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:48,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:48,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:48,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:49,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:49,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:49,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:49,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:49,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:51,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:52,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:52,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 13:19:52,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-29 13:19:52,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 13:19:52,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:52,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:52,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:19:52,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 13:19:52,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-29 13:19:52,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:53,020 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 13:19:53,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:19:53,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:53,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:53,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:53,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:19:53,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:19:53,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 13:19:53,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:53,034 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:53,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:19:53,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:19:53,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:19:53,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:53,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:19:53,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [113930041] [2020-10-29 13:19:53,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:19:53,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:19:53,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26375668] [2020-10-29 13:19:53,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:19:53,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:19:53,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:19:53,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:19:53,047 INFO L87 Difference]: Start difference. First operand 3293 states and 4830 transitions. Second operand 6 states. [2020-10-29 13:19:53,293 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-29 13:19:54,226 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-29 13:19:54,462 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-29 13:19:58,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:19:58,645 INFO L93 Difference]: Finished difference Result 20763 states and 30847 transitions. [2020-10-29 13:19:58,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:19:58,646 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-10-29 13:19:58,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:19:58,675 INFO L225 Difference]: With dead ends: 20763 [2020-10-29 13:19:58,675 INFO L226 Difference]: Without dead ends: 17804 [2020-10-29 13:19:58,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:19:58,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17804 states. [2020-10-29 13:20:00,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17804 to 7666. [2020-10-29 13:20:00,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7666 states. [2020-10-29 13:20:00,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7666 states to 7666 states and 11324 transitions. [2020-10-29 13:20:00,563 INFO L78 Accepts]: Start accepts. Automaton has 7666 states and 11324 transitions. Word has length 73 [2020-10-29 13:20:00,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:20:00,563 INFO L481 AbstractCegarLoop]: Abstraction has 7666 states and 11324 transitions. [2020-10-29 13:20:00,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:20:00,563 INFO L276 IsEmpty]: Start isEmpty. Operand 7666 states and 11324 transitions. [2020-10-29 13:20:00,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-29 13:20:00,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:20:00,566 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:20:00,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 13:20:00,566 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:20:00,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:20:00,567 INFO L82 PathProgramCache]: Analyzing trace with hash 549543095, now seen corresponding path program 1 times [2020-10-29 13:20:00,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:20:00,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2003008666] [2020-10-29 13:20:00,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:20:00,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:20:00,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:00,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:00,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:01,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:01,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:05,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:20:05,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-29 13:20:05,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:20:05,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-29 13:20:05,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:20:05,596 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:20:05,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:20:05,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:20:05,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-29 13:20:05,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:20:05,834 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 13:20:05,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:20:05,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:20:05,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:05,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:20:05,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:20:05,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:20:05,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 13:20:05,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:20:05,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:20:05,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:20:05,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:20:05,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:20:05,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:20:05,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:20:05,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2003008666] [2020-10-29 13:20:05,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:20:05,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:20:05,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366396795] [2020-10-29 13:20:05,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:20:05,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:20:05,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:20:05,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:20:05,859 INFO L87 Difference]: Start difference. First operand 7666 states and 11324 transitions. Second operand 6 states. [2020-10-29 13:20:06,118 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-29 13:20:06,733 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-29 13:20:06,981 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-29 13:20:09,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:20:09,479 INFO L93 Difference]: Finished difference Result 15324 states and 22779 transitions. [2020-10-29 13:20:09,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:20:09,480 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 74 [2020-10-29 13:20:09,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:20:09,502 INFO L225 Difference]: With dead ends: 15324 [2020-10-29 13:20:09,502 INFO L226 Difference]: Without dead ends: 10686 [2020-10-29 13:20:09,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:20:09,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10686 states. [2020-10-29 13:20:11,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10686 to 9838. [2020-10-29 13:20:11,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9838 states. [2020-10-29 13:20:11,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9838 states to 9838 states and 14628 transitions. [2020-10-29 13:20:11,928 INFO L78 Accepts]: Start accepts. Automaton has 9838 states and 14628 transitions. Word has length 74 [2020-10-29 13:20:11,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:20:11,928 INFO L481 AbstractCegarLoop]: Abstraction has 9838 states and 14628 transitions. [2020-10-29 13:20:11,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:20:11,928 INFO L276 IsEmpty]: Start isEmpty. Operand 9838 states and 14628 transitions. [2020-10-29 13:20:11,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-29 13:20:11,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:20:11,930 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:20:11,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 13:20:11,931 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:20:11,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:20:11,931 INFO L82 PathProgramCache]: Analyzing trace with hash 219940378, now seen corresponding path program 1 times [2020-10-29 13:20:11,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:20:11,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [90410322] [2020-10-29 13:20:11,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:20:11,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:20:11,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:11,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:12,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:12,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:16,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:20:16,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-29 13:20:16,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:20:16,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4609 [2020-10-29 13:20:16,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:20:16,563 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:20:16,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:20:16,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-29 13:20:16,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-29 13:20:16,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:20:16,799 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 13:20:16,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:20:16,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:20:16,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:16,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:20:16,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:20:16,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:20:16,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:20:16,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:20:16,813 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:20:16,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:20:16,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:20:16,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:20:16,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:20:16,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:20:16,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [90410322] [2020-10-29 13:20:16,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:20:16,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:20:16,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241781017] [2020-10-29 13:20:16,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:20:16,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:20:16,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:20:16,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:20:16,828 INFO L87 Difference]: Start difference. First operand 9838 states and 14628 transitions. Second operand 6 states. [2020-10-29 13:20:17,086 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-29 13:20:17,712 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-29 13:20:17,946 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-29 13:20:21,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:20:21,144 INFO L93 Difference]: Finished difference Result 22186 states and 32967 transitions. [2020-10-29 13:20:21,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:20:21,145 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 74 [2020-10-29 13:20:21,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:20:21,172 INFO L225 Difference]: With dead ends: 22186 [2020-10-29 13:20:21,172 INFO L226 Difference]: Without dead ends: 13093 [2020-10-29 13:20:21,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:20:21,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13093 states. [2020-10-29 13:20:24,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13093 to 11685. [2020-10-29 13:20:24,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11685 states. [2020-10-29 13:20:24,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11685 states to 11685 states and 17391 transitions. [2020-10-29 13:20:24,039 INFO L78 Accepts]: Start accepts. Automaton has 11685 states and 17391 transitions. Word has length 74 [2020-10-29 13:20:24,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:20:24,040 INFO L481 AbstractCegarLoop]: Abstraction has 11685 states and 17391 transitions. [2020-10-29 13:20:24,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:20:24,040 INFO L276 IsEmpty]: Start isEmpty. Operand 11685 states and 17391 transitions. [2020-10-29 13:20:24,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-29 13:20:24,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:20:24,043 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:20:24,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 13:20:24,043 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:20:24,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:20:24,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1061379067, now seen corresponding path program 1 times [2020-10-29 13:20:24,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:20:24,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1785559130] [2020-10-29 13:20:24,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:20:24,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:20:24,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:24,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:24,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:24,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:24,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:24,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:24,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:24,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:24,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:24,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:25,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:25,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:25,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:25,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:25,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:26,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:27,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:27,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:28,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:28,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:28,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:29,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:20:29,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-29 13:20:29,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-29 13:20:29,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 13:20:29,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:20:29,076 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:20:29,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:20:29,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:20:29,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-29 13:20:29,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:20:29,481 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 13:20:29,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:20:29,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:20:29,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:29,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:20:29,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:20:29,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:20:29,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 13:20:29,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:20:29,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:20:29,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:20:29,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:20:29,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:20:29,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:20:29,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:20:29,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1785559130] [2020-10-29 13:20:29,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:20:29,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:20:29,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471655914] [2020-10-29 13:20:29,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:20:29,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:20:29,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:20:29,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:20:29,506 INFO L87 Difference]: Start difference. First operand 11685 states and 17391 transitions. Second operand 9 states. [2020-10-29 13:20:29,794 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:20:31,140 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:20:31,398 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-29 13:20:37,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:20:37,137 INFO L93 Difference]: Finished difference Result 32047 states and 47581 transitions. [2020-10-29 13:20:37,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 13:20:37,138 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 74 [2020-10-29 13:20:37,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:20:37,179 INFO L225 Difference]: With dead ends: 32047 [2020-10-29 13:20:37,179 INFO L226 Difference]: Without dead ends: 20834 [2020-10-29 13:20:37,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2020-10-29 13:20:37,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20834 states. [2020-10-29 13:20:40,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20834 to 11685. [2020-10-29 13:20:40,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11685 states. [2020-10-29 13:20:40,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11685 states to 11685 states and 17279 transitions. [2020-10-29 13:20:40,437 INFO L78 Accepts]: Start accepts. Automaton has 11685 states and 17279 transitions. Word has length 74 [2020-10-29 13:20:40,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:20:40,437 INFO L481 AbstractCegarLoop]: Abstraction has 11685 states and 17279 transitions. [2020-10-29 13:20:40,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:20:40,437 INFO L276 IsEmpty]: Start isEmpty. Operand 11685 states and 17279 transitions. [2020-10-29 13:20:40,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-29 13:20:40,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:20:40,440 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:20:40,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 13:20:40,440 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:20:40,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:20:40,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1668398734, now seen corresponding path program 1 times [2020-10-29 13:20:40,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:20:40,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1738026951] [2020-10-29 13:20:40,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:20:40,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:20:40,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:40,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:40,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:41,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:41,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:20:41,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-29 13:20:41,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:20:41,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1415 [2020-10-29 13:20:41,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:20:41,881 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:20:41,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:20:41,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:20:41,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-29 13:20:41,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:20:42,149 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 13:20:42,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:20:42,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:20:42,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:42,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:20:42,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:20:42,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:20:42,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-29 13:20:42,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:20:42,178 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:20:42,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:20:42,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:20:42,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:20:42,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:20:42,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:20:42,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1738026951] [2020-10-29 13:20:42,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:20:42,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:20:42,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162961604] [2020-10-29 13:20:42,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:20:42,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:20:42,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:20:42,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:20:42,192 INFO L87 Difference]: Start difference. First operand 11685 states and 17279 transitions. Second operand 6 states. [2020-10-29 13:20:42,461 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-29 13:20:43,158 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:20:45,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:20:45,345 INFO L93 Difference]: Finished difference Result 16128 states and 23943 transitions. [2020-10-29 13:20:45,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:20:45,346 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 74 [2020-10-29 13:20:45,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:20:45,355 INFO L225 Difference]: With dead ends: 16128 [2020-10-29 13:20:45,355 INFO L226 Difference]: Without dead ends: 9262 [2020-10-29 13:20:45,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:20:45,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9262 states. [2020-10-29 13:20:47,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9262 to 7016. [2020-10-29 13:20:47,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7016 states. [2020-10-29 13:20:47,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7016 states to 7016 states and 10335 transitions. [2020-10-29 13:20:47,138 INFO L78 Accepts]: Start accepts. Automaton has 7016 states and 10335 transitions. Word has length 74 [2020-10-29 13:20:47,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:20:47,138 INFO L481 AbstractCegarLoop]: Abstraction has 7016 states and 10335 transitions. [2020-10-29 13:20:47,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:20:47,138 INFO L276 IsEmpty]: Start isEmpty. Operand 7016 states and 10335 transitions. [2020-10-29 13:20:47,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-29 13:20:47,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:20:47,140 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:20:47,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 13:20:47,140 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:20:47,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:20:47,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1725127311, now seen corresponding path program 1 times [2020-10-29 13:20:47,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:20:47,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544836225] [2020-10-29 13:20:47,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:20:47,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:20:47,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:47,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:47,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:47,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:48,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:52,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:20:52,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-29 13:20:52,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:20:52,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 13:20:52,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:20:52,169 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:20:52,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 13:20:52,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:20:52,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-29 13:20:52,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:20:52,619 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 13:20:52,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:20:52,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:20:52,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:52,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:20:52,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:20:52,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:20:52,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 13:20:52,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:20:52,631 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:20:52,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:20:52,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:20:52,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:20:52,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:20:52,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:20:52,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [544836225] [2020-10-29 13:20:52,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:20:52,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-29 13:20:52,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398675488] [2020-10-29 13:20:52,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 13:20:52,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:20:52,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 13:20:52,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:20:52,654 INFO L87 Difference]: Start difference. First operand 7016 states and 10335 transitions. Second operand 10 states. [2020-10-29 13:20:52,934 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-29 13:20:53,941 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-29 13:20:54,201 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-29 13:20:57,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:20:57,435 INFO L93 Difference]: Finished difference Result 18002 states and 26659 transitions. [2020-10-29 13:20:57,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:20:57,435 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 75 [2020-10-29 13:20:57,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:20:57,451 INFO L225 Difference]: With dead ends: 18002 [2020-10-29 13:20:57,451 INFO L226 Difference]: Without dead ends: 11471 [2020-10-29 13:20:57,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-29 13:20:57,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11471 states. [2020-10-29 13:20:59,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11471 to 7001. [2020-10-29 13:20:59,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7001 states. [2020-10-29 13:20:59,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7001 states to 7001 states and 10288 transitions. [2020-10-29 13:20:59,300 INFO L78 Accepts]: Start accepts. Automaton has 7001 states and 10288 transitions. Word has length 75 [2020-10-29 13:20:59,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:20:59,301 INFO L481 AbstractCegarLoop]: Abstraction has 7001 states and 10288 transitions. [2020-10-29 13:20:59,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 13:20:59,301 INFO L276 IsEmpty]: Start isEmpty. Operand 7001 states and 10288 transitions. [2020-10-29 13:20:59,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-29 13:20:59,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:20:59,302 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:20:59,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 13:20:59,302 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:20:59,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:20:59,303 INFO L82 PathProgramCache]: Analyzing trace with hash -51522525, now seen corresponding path program 1 times [2020-10-29 13:20:59,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:20:59,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1883393412] [2020-10-29 13:20:59,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:20:59,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:20:59,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:59,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:59,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:59,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:59,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:59,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:00,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:01,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:01,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:01,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:01,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:01,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:01,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:01,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:02,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:02,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:02,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:02,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:03,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:04,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:04,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:04,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:21:04,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-29 13:21:04,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-29 13:21:04,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 13:21:04,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:21:04,327 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:21:04,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:21:04,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-29 13:21:04,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-29 13:21:04,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:21:04,579 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 13:21:04,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:21:04,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:21:04,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:04,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:21:04,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:21:04,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:21:04,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:21:04,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:21:04,593 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:21:04,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:21:04,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:21:04,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:21:04,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:21:04,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:21:04,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1883393412] [2020-10-29 13:21:04,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:21:04,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:21:04,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800715910] [2020-10-29 13:21:04,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:21:04,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:21:04,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:21:04,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:21:04,612 INFO L87 Difference]: Start difference. First operand 7001 states and 10288 transitions. Second operand 6 states. [2020-10-29 13:21:04,875 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-29 13:21:05,594 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-29 13:21:05,895 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-29 13:21:08,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:21:08,565 INFO L93 Difference]: Finished difference Result 16045 states and 23578 transitions. [2020-10-29 13:21:08,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:21:08,566 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 75 [2020-10-29 13:21:08,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:21:08,576 INFO L225 Difference]: With dead ends: 16045 [2020-10-29 13:21:08,576 INFO L226 Difference]: Without dead ends: 9538 [2020-10-29 13:21:08,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:21:08,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9538 states. [2020-10-29 13:21:10,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9538 to 8118. [2020-10-29 13:21:10,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8118 states. [2020-10-29 13:21:10,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8118 states to 8118 states and 11938 transitions. [2020-10-29 13:21:10,636 INFO L78 Accepts]: Start accepts. Automaton has 8118 states and 11938 transitions. Word has length 75 [2020-10-29 13:21:10,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:21:10,637 INFO L481 AbstractCegarLoop]: Abstraction has 8118 states and 11938 transitions. [2020-10-29 13:21:10,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:21:10,637 INFO L276 IsEmpty]: Start isEmpty. Operand 8118 states and 11938 transitions. [2020-10-29 13:21:10,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-29 13:21:10,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:21:10,639 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:21:10,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 13:21:10,639 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:21:10,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:21:10,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1092471420, now seen corresponding path program 1 times [2020-10-29 13:21:10,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:21:10,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [56016751] [2020-10-29 13:21:10,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:21:10,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:21:10,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:10,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:11,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:21:11,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-29 13:21:11,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:21:11,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 840 [2020-10-29 13:21:11,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:21:11,501 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:21:11,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 13:21:11,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:21:11,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-29 13:21:11,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:21:11,916 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 13:21:11,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:21:11,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:21:11,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:11,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:21:11,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:21:11,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:21:11,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 13:21:11,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:21:11,927 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:21:11,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:21:11,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:21:11,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:21:11,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:21:11,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:21:11,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [56016751] [2020-10-29 13:21:11,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:21:11,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-29 13:21:11,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771626586] [2020-10-29 13:21:11,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 13:21:11,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:21:11,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 13:21:11,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:21:11,942 INFO L87 Difference]: Start difference. First operand 8118 states and 11938 transitions. Second operand 10 states. [2020-10-29 13:21:12,207 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:21:13,212 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-29 13:21:16,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:21:16,147 INFO L93 Difference]: Finished difference Result 18325 states and 27091 transitions. [2020-10-29 13:21:16,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 13:21:16,147 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 76 [2020-10-29 13:21:16,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:21:16,159 INFO L225 Difference]: With dead ends: 18325 [2020-10-29 13:21:16,159 INFO L226 Difference]: Without dead ends: 10658 [2020-10-29 13:21:16,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-10-29 13:21:16,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10658 states. [2020-10-29 13:21:18,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10658 to 8046. [2020-10-29 13:21:18,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8046 states. [2020-10-29 13:21:18,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8046 states to 8046 states and 11839 transitions. [2020-10-29 13:21:18,250 INFO L78 Accepts]: Start accepts. Automaton has 8046 states and 11839 transitions. Word has length 76 [2020-10-29 13:21:18,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:21:18,250 INFO L481 AbstractCegarLoop]: Abstraction has 8046 states and 11839 transitions. [2020-10-29 13:21:18,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 13:21:18,251 INFO L276 IsEmpty]: Start isEmpty. Operand 8046 states and 11839 transitions. [2020-10-29 13:21:18,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-29 13:21:18,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:21:18,252 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:21:18,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 13:21:18,253 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:21:18,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:21:18,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1413919140, now seen corresponding path program 1 times [2020-10-29 13:21:18,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:21:18,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1914220712] [2020-10-29 13:21:18,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:21:18,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:21:18,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:18,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:18,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:21:18,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-29 13:21:18,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:21:18,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 281 [2020-10-29 13:21:18,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:21:18,557 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:21:18,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:21:18,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:21:18,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 13:21:18,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:21:18,834 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 13:21:18,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:21:18,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:21:18,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:18,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:21:18,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:21:18,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:21:18,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-29 13:21:18,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:21:18,865 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:21:18,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:21:18,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:21:18,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:21:18,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:21:18,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:21:18,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1914220712] [2020-10-29 13:21:18,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:21:18,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:21:18,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731641232] [2020-10-29 13:21:18,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:21:18,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:21:18,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:21:18,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:21:18,891 INFO L87 Difference]: Start difference. First operand 8046 states and 11839 transitions. Second operand 6 states. [2020-10-29 13:21:19,175 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-29 13:21:19,842 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-29 13:21:21,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:21:21,674 INFO L93 Difference]: Finished difference Result 11824 states and 17477 transitions. [2020-10-29 13:21:21,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:21:21,675 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 76 [2020-10-29 13:21:21,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:21:21,681 INFO L225 Difference]: With dead ends: 11824 [2020-10-29 13:21:21,681 INFO L226 Difference]: Without dead ends: 6019 [2020-10-29 13:21:21,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:21:21,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6019 states. [2020-10-29 13:21:22,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6019 to 4109. [2020-10-29 13:21:22,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4109 states. [2020-10-29 13:21:22,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4109 states to 4109 states and 6016 transitions. [2020-10-29 13:21:22,942 INFO L78 Accepts]: Start accepts. Automaton has 4109 states and 6016 transitions. Word has length 76 [2020-10-29 13:21:22,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:21:22,942 INFO L481 AbstractCegarLoop]: Abstraction has 4109 states and 6016 transitions. [2020-10-29 13:21:22,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:21:22,942 INFO L276 IsEmpty]: Start isEmpty. Operand 4109 states and 6016 transitions. [2020-10-29 13:21:22,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-29 13:21:22,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:21:22,944 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:21:22,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 13:21:22,944 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:21:22,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:21:22,944 INFO L82 PathProgramCache]: Analyzing trace with hash 577244478, now seen corresponding path program 1 times [2020-10-29 13:21:22,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:21:22,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [421461957] [2020-10-29 13:21:22,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:21:22,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:21:22,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:23,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:23,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:23,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:23,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:23,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:23,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:24,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:27,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:21:27,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-29 13:21:27,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:21:27,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4047 [2020-10-29 13:21:27,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:21:27,012 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:21:27,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:21:27,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:21:27,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-29 13:21:27,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:21:27,501 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 13:21:27,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:21:27,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:21:27,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:27,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:21:27,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:21:27,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:21:27,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 13:21:27,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:21:27,513 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:21:27,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:21:27,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:21:27,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:21:27,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:21:27,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:21:27,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [421461957] [2020-10-29 13:21:27,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:21:27,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:21:27,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930478689] [2020-10-29 13:21:27,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:21:27,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:21:27,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:21:27,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:21:27,535 INFO L87 Difference]: Start difference. First operand 4109 states and 6016 transitions. Second operand 9 states. [2020-10-29 13:21:27,839 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-29 13:21:28,692 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-29 13:21:28,989 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:21:31,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:21:31,915 INFO L93 Difference]: Finished difference Result 10928 states and 16140 transitions. [2020-10-29 13:21:31,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:21:31,916 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 77 [2020-10-29 13:21:31,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:21:31,927 INFO L225 Difference]: With dead ends: 10928 [2020-10-29 13:21:31,927 INFO L226 Difference]: Without dead ends: 7717 [2020-10-29 13:21:31,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-10-29 13:21:31,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7717 states. [2020-10-29 13:21:33,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7717 to 3932. [2020-10-29 13:21:33,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3932 states. [2020-10-29 13:21:33,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3932 states to 3932 states and 5772 transitions. [2020-10-29 13:21:33,293 INFO L78 Accepts]: Start accepts. Automaton has 3932 states and 5772 transitions. Word has length 77 [2020-10-29 13:21:33,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:21:33,293 INFO L481 AbstractCegarLoop]: Abstraction has 3932 states and 5772 transitions. [2020-10-29 13:21:33,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:21:33,293 INFO L276 IsEmpty]: Start isEmpty. Operand 3932 states and 5772 transitions. [2020-10-29 13:21:33,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-29 13:21:33,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:21:33,294 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:21:33,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 13:21:33,295 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:21:33,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:21:33,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1879937972, now seen corresponding path program 1 times [2020-10-29 13:21:33,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:21:33,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1682080442] [2020-10-29 13:21:33,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:21:33,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:21:33,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:33,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:33,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:33,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:35,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:21:35,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-29 13:21:35,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:21:35,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1687 [2020-10-29 13:21:35,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:21:35,005 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:21:35,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 13:21:35,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:21:35,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-29 13:21:35,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:21:35,403 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 13:21:35,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:21:35,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:21:35,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:35,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:21:35,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:21:35,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:21:35,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 13:21:35,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:21:35,415 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:21:35,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:21:35,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:21:35,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:21:35,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:21:35,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:21:35,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1682080442] [2020-10-29 13:21:35,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:21:35,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-29 13:21:35,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016602940] [2020-10-29 13:21:35,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 13:21:35,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:21:35,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 13:21:35,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:21:35,435 INFO L87 Difference]: Start difference. First operand 3932 states and 5772 transitions. Second operand 10 states. [2020-10-29 13:21:35,721 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:21:36,767 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-29 13:21:37,073 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-29 13:21:39,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:21:39,610 INFO L93 Difference]: Finished difference Result 9617 states and 14185 transitions. [2020-10-29 13:21:39,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:21:39,613 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 78 [2020-10-29 13:21:39,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:21:39,618 INFO L225 Difference]: With dead ends: 9617 [2020-10-29 13:21:39,619 INFO L226 Difference]: Without dead ends: 5808 [2020-10-29 13:21:39,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2020-10-29 13:21:39,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5808 states. [2020-10-29 13:21:40,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5808 to 3898. [2020-10-29 13:21:40,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3898 states. [2020-10-29 13:21:40,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3898 states to 3898 states and 5730 transitions. [2020-10-29 13:21:40,985 INFO L78 Accepts]: Start accepts. Automaton has 3898 states and 5730 transitions. Word has length 78 [2020-10-29 13:21:40,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:21:40,985 INFO L481 AbstractCegarLoop]: Abstraction has 3898 states and 5730 transitions. [2020-10-29 13:21:40,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 13:21:40,985 INFO L276 IsEmpty]: Start isEmpty. Operand 3898 states and 5730 transitions. [2020-10-29 13:21:40,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-29 13:21:40,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:21:40,986 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:21:40,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 13:21:40,986 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:21:40,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:21:40,987 INFO L82 PathProgramCache]: Analyzing trace with hash 917822357, now seen corresponding path program 1 times [2020-10-29 13:21:40,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:21:40,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202066422] [2020-10-29 13:21:40,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:21:41,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:21:41,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:41,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:41,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:43,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:21:43,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-29 13:21:43,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:21:43,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2955 [2020-10-29 13:21:43,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:21:43,964 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:21:43,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-29 13:21:43,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:21:43,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-29 13:21:43,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:21:44,794 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 47 [2020-10-29 13:21:44,937 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2020-10-29 13:21:45,174 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-10-29 13:21:45,565 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2020-10-29 13:21:46,371 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 13:21:46,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:21:46,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:21:46,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:46,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:21:46,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:21:46,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:21:46,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:21:46,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:21:46,387 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:21:46,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:21:46,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:21:46,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:21:46,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:21:46,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:21:46,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202066422] [2020-10-29 13:21:46,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:21:46,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2020-10-29 13:21:46,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94880915] [2020-10-29 13:21:46,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-29 13:21:46,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:21:46,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-29 13:21:46,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2020-10-29 13:21:46,436 INFO L87 Difference]: Start difference. First operand 3898 states and 5730 transitions. Second operand 23 states. [2020-10-29 13:21:46,760 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 112 [2020-10-29 13:21:47,784 WARN L193 SmtUtils]: Spent 933.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 241 [2020-10-29 13:21:48,512 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-10-29 13:21:48,845 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 101 [2020-10-29 13:21:49,232 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 103