/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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_floodmax.3.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:10:40,329 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:10:40,332 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:10:40,368 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:10:40,369 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:10:40,371 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:10:40,372 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:10:40,375 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:10:40,377 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:10:40,378 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:10:40,380 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:10:40,381 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:10:40,382 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:10:40,383 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:10:40,385 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:10:40,386 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:10:40,387 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:10:40,388 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:10:40,391 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:10:40,393 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:10:40,396 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:10:40,397 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:10:40,399 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:10:40,403 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:10:40,408 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:10:40,409 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:10:40,409 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:10:40,414 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:10:40,414 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:10:40,415 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:10:40,415 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:10:40,416 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:10:40,417 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:10:40,418 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:10:40,419 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:10:40,420 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:10:40,421 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:10:40,421 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:10:40,421 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:10:40,431 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:10:40,432 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:10:40,434 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 18:10:40,490 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:10:40,490 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:10:40,492 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:10:40,493 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:10:40,493 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:10:40,493 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:10:40,494 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:10:40,494 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:10:40,494 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:10:40,494 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:10:40,495 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:10:40,495 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:10:40,496 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:10:40,496 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:10:40,496 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:10:40,496 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:10:40,496 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:10:40,497 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:10:40,497 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:10:40,497 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:10:40,497 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:10:40,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:10:40,498 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:10:40,498 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:10:40,498 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:10:40,498 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:10:40,498 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:10:40,499 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:10:40,499 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:10:40,499 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:10:40,992 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:10:41,026 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:10:41,030 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:10:41,032 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:10:41,033 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:10:41,034 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 18:10:41,110 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8b073c68b/7e3b34d42adc453a84d3804425f23218/FLAG760cefe1f [2020-10-28 18:10:41,871 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:10:41,872 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 18:10:41,900 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8b073c68b/7e3b34d42adc453a84d3804425f23218/FLAG760cefe1f [2020-10-28 18:10:42,065 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8b073c68b/7e3b34d42adc453a84d3804425f23218 [2020-10-28 18:10:42,071 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:10:42,079 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:10:42,082 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:10:42,082 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:10:42,086 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:10:42,087 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:10:42" (1/1) ... [2020-10-28 18:10:42,091 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ec3f403 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:10:42, skipping insertion in model container [2020-10-28 18:10:42,092 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:10:42" (1/1) ... [2020-10-28 18:10:42,100 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:10:42,158 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:10:42,760 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:10:42,782 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:10:43,044 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:10:43,074 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:10:43,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:10:43 WrapperNode [2020-10-28 18:10:43,076 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:10:43,078 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:10:43,078 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:10:43,078 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:10:43,093 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:10:43" (1/1) ... [2020-10-28 18:10:43,096 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:10:43" (1/1) ... [2020-10-28 18:10:43,131 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:10:43" (1/1) ... [2020-10-28 18:10:43,134 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:10:43" (1/1) ... [2020-10-28 18:10:43,187 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:10:43" (1/1) ... [2020-10-28 18:10:43,208 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:10:43" (1/1) ... [2020-10-28 18:10:43,213 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:10:43" (1/1) ... [2020-10-28 18:10:43,219 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:10:43,220 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:10:43,221 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:10:43,221 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:10:43,222 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:10:43" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:10:43,301 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:10:43,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:10:43,302 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:10:43,302 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:10:43,302 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:10:43,302 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:10:43,303 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:10:43,303 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:10:43,303 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:10:43,303 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:10:43,303 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 18:10:43,303 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:10:43,304 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:10:43,304 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:10:43,304 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:10:43,304 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:10:43,304 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:10:43,305 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:10:43,305 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:10:43,305 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:10:43,305 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:10:43,305 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:10:43,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:10:43,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:10:43,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:10:43,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:10:43,306 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:10:43,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:10:45,223 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:10:45,223 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:10:45,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:10:45 BoogieIcfgContainer [2020-10-28 18:10:45,226 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:10:45,228 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:10:45,229 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:10:45,232 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:10:45,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:10:42" (1/3) ... [2020-10-28 18:10:45,234 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ea7e226 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:10:45, skipping insertion in model container [2020-10-28 18:10:45,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:10:43" (2/3) ... [2020-10-28 18:10:45,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ea7e226 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:10:45, skipping insertion in model container [2020-10-28 18:10:45,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:10:45" (3/3) ... [2020-10-28 18:10:45,237 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 18:10:45,256 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:10:45,263 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:10:45,294 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:10:45,367 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:10:45,367 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:10:45,367 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:10:45,368 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:10:45,368 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:10:45,368 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:10:45,368 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:10:45,368 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:10:45,403 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states. [2020-10-28 18:10:45,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-28 18:10:45,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:10:45,427 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:10:45,427 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:10:45,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:10:45,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1270658696, now seen corresponding path program 1 times [2020-10-28 18:10:45,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:10:45,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066885602] [2020-10-28 18:10:45,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:10:45,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:10:46,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:46,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:46,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:46,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:46,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:46,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:47,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:47,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:47,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:48,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:48,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:49,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:50,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:50,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:10:50,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-28 18:10:50,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 18:10:50,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-28 18:10:50,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:10:50,896 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:10:50,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:10:50,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 18:10:50,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-28 18:10:50,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 18:10:51,601 WARN L193 SmtUtils]: Spent 538.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 18:10:51,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:10:51,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:10:51,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:51,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:10:51,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:10:51,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:10:51,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 18:10:51,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:10:51,639 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:10:51,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:10:51,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:10:51,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:10:51,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:10:51,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:10:51,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066885602] [2020-10-28 18:10:51,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:10:51,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:10:51,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474249042] [2020-10-28 18:10:51,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:10:51,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:10:51,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:10:51,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:10:51,763 INFO L87 Difference]: Start difference. First operand 321 states. Second operand 4 states. [2020-10-28 18:10:52,444 WARN L193 SmtUtils]: Spent 582.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-28 18:10:55,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:10:55,064 INFO L93 Difference]: Finished difference Result 647 states and 1128 transitions. [2020-10-28 18:10:55,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:10:55,067 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 151 [2020-10-28 18:10:55,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:10:55,088 INFO L225 Difference]: With dead ends: 647 [2020-10-28 18:10:55,089 INFO L226 Difference]: Without dead ends: 516 [2020-10-28 18:10:55,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:10:55,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2020-10-28 18:10:55,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 513. [2020-10-28 18:10:55,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 513 states. [2020-10-28 18:10:55,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 762 transitions. [2020-10-28 18:10:55,208 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 762 transitions. Word has length 151 [2020-10-28 18:10:55,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:10:55,209 INFO L481 AbstractCegarLoop]: Abstraction has 513 states and 762 transitions. [2020-10-28 18:10:55,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:10:55,209 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 762 transitions. [2020-10-28 18:10:55,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-28 18:10:55,219 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:10:55,220 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:10:55,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:10:55,221 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:10:55,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:10:55,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1027994380, now seen corresponding path program 1 times [2020-10-28 18:10:55,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:10:55,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [936820970] [2020-10-28 18:10:55,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:10:55,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:10:55,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:55,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:55,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:55,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:55,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:55,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:56,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:56,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:56,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:56,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:56,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:57,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:58,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:58,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:00,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:11:00,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-28 18:11:00,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 18:11:00,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-28 18:11:00,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:11:00,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:11:00,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:11:00,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-28 18:11:00,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-28 18:11:00,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:11:01,170 WARN L193 SmtUtils]: Spent 651.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 18:11:01,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:11:01,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:11:01,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:01,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:11:01,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:11:01,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:11:01,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 18:11:01,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:11:01,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:11:01,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:11:01,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:11:01,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:11:01,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:11:01,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:11:01,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [936820970] [2020-10-28 18:11:01,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:11:01,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:11:01,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010014149] [2020-10-28 18:11:01,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:11:01,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:11:01,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:11:01,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:11:01,294 INFO L87 Difference]: Start difference. First operand 513 states and 762 transitions. Second operand 6 states. [2020-10-28 18:11:02,022 WARN L193 SmtUtils]: Spent 654.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 18:11:04,147 WARN L193 SmtUtils]: Spent 682.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 18:11:05,174 WARN L193 SmtUtils]: Spent 686.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-28 18:11:05,900 WARN L193 SmtUtils]: Spent 687.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 18:11:07,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:11:07,028 INFO L93 Difference]: Finished difference Result 1320 states and 2101 transitions. [2020-10-28 18:11:07,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 18:11:07,030 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 151 [2020-10-28 18:11:07,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:11:07,040 INFO L225 Difference]: With dead ends: 1320 [2020-10-28 18:11:07,040 INFO L226 Difference]: Without dead ends: 1152 [2020-10-28 18:11:07,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:11:07,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2020-10-28 18:11:07,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 834. [2020-10-28 18:11:07,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 834 states. [2020-10-28 18:11:07,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1292 transitions. [2020-10-28 18:11:07,141 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1292 transitions. Word has length 151 [2020-10-28 18:11:07,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:11:07,143 INFO L481 AbstractCegarLoop]: Abstraction has 834 states and 1292 transitions. [2020-10-28 18:11:07,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:11:07,143 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1292 transitions. [2020-10-28 18:11:07,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-28 18:11:07,157 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:11:07,158 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:11:07,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:11:07,162 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:11:07,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:11:07,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1679306702, now seen corresponding path program 1 times [2020-10-28 18:11:07,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:11:07,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1886831342] [2020-10-28 18:11:07,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:11:07,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:11:07,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:07,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:07,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:07,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:07,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:07,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:07,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:07,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:07,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:08,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:08,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:10,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:10,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:10,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:10,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:10,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:11,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:12,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:11:12,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-28 18:11:12,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-28 18:11:12,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-28 18:11:12,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:11:12,252 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:11:12,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:11:12,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:11:12,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-28 18:11:12,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:11:13,015 WARN L193 SmtUtils]: Spent 616.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 18:11:13,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:11:13,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:11:13,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:13,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:11:13,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:11:13,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:11:13,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 18:11:13,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:11:13,043 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:11:13,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:11:13,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:11:13,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:11:13,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:11:13,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:11:13,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1886831342] [2020-10-28 18:11:13,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:11:13,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:11:13,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606950276] [2020-10-28 18:11:13,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:11:13,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:11:13,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:11:13,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:11:13,133 INFO L87 Difference]: Start difference. First operand 834 states and 1292 transitions. Second operand 5 states. [2020-10-28 18:11:16,157 WARN L193 SmtUtils]: Spent 669.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 18:11:17,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:11:17,527 INFO L93 Difference]: Finished difference Result 2419 states and 3744 transitions. [2020-10-28 18:11:17,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:11:17,529 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 151 [2020-10-28 18:11:17,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:11:17,539 INFO L225 Difference]: With dead ends: 2419 [2020-10-28 18:11:17,539 INFO L226 Difference]: Without dead ends: 1610 [2020-10-28 18:11:17,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:11:17,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1610 states. [2020-10-28 18:11:17,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1610 to 1607. [2020-10-28 18:11:17,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1607 states. [2020-10-28 18:11:17,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1607 states to 1607 states and 2469 transitions. [2020-10-28 18:11:17,666 INFO L78 Accepts]: Start accepts. Automaton has 1607 states and 2469 transitions. Word has length 151 [2020-10-28 18:11:17,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:11:17,666 INFO L481 AbstractCegarLoop]: Abstraction has 1607 states and 2469 transitions. [2020-10-28 18:11:17,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:11:17,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1607 states and 2469 transitions. [2020-10-28 18:11:17,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-28 18:11:17,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:11:17,670 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:11:17,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:11:17,671 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:11:17,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:11:17,672 INFO L82 PathProgramCache]: Analyzing trace with hash 2035852534, now seen corresponding path program 1 times [2020-10-28 18:11:17,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:11:17,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31106514] [2020-10-28 18:11:17,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:11:17,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:11:17,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:17,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:17,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:18,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:18,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:18,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:18,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:18,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:18,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:18,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:18,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:19,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:22,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:22,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:22,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:11:22,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-28 18:11:22,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 18:11:22,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-28 18:11:22,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:11:22,755 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:11:22,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:11:22,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:11:22,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-28 18:11:22,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:11:23,527 WARN L193 SmtUtils]: Spent 634.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 18:11:23,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:11:23,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:11:23,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:23,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:11:23,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:11:23,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:11:23,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 18:11:23,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:11:23,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:11:23,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:11:23,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:11:23,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:11:23,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:11:23,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:11:23,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31106514] [2020-10-28 18:11:23,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:11:23,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:11:23,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144506926] [2020-10-28 18:11:23,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:11:23,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:11:23,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:11:23,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:11:23,634 INFO L87 Difference]: Start difference. First operand 1607 states and 2469 transitions. Second operand 5 states. [2020-10-28 18:11:26,648 WARN L193 SmtUtils]: Spent 719.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 18:11:27,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:11:27,948 INFO L93 Difference]: Finished difference Result 4667 states and 7157 transitions. [2020-10-28 18:11:27,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:11:27,949 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 152 [2020-10-28 18:11:27,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:11:27,967 INFO L225 Difference]: With dead ends: 4667 [2020-10-28 18:11:27,967 INFO L226 Difference]: Without dead ends: 3093 [2020-10-28 18:11:27,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:11:27,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3093 states. [2020-10-28 18:11:28,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3093 to 3090. [2020-10-28 18:11:28,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3090 states. [2020-10-28 18:11:28,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3090 states to 3090 states and 4701 transitions. [2020-10-28 18:11:28,158 INFO L78 Accepts]: Start accepts. Automaton has 3090 states and 4701 transitions. Word has length 152 [2020-10-28 18:11:28,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:11:28,159 INFO L481 AbstractCegarLoop]: Abstraction has 3090 states and 4701 transitions. [2020-10-28 18:11:28,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:11:28,159 INFO L276 IsEmpty]: Start isEmpty. Operand 3090 states and 4701 transitions. [2020-10-28 18:11:28,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-28 18:11:28,163 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:11:28,164 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:11:28,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 18:11:28,164 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:11:28,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:11:28,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1457589941, now seen corresponding path program 1 times [2020-10-28 18:11:28,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:11:28,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1815845219] [2020-10-28 18:11:28,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:11:28,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:11:28,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:28,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:28,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:28,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:28,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:28,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:28,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:28,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:28,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:28,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:30,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:30,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:30,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:30,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:33,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:11:33,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-28 18:11:33,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 18:11:33,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 18:11:33,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:11:33,203 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:11:33,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:11:33,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:11:33,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-28 18:11:33,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:11:34,021 WARN L193 SmtUtils]: Spent 577.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 18:11:34,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:11:34,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:11:34,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:34,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:11:34,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:11:34,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:11:34,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 18:11:34,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:11:34,043 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:11:34,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:11:34,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:11:34,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:11:34,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:11:34,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:11:34,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1815845219] [2020-10-28 18:11:34,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:11:34,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:11:34,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569950156] [2020-10-28 18:11:34,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:11:34,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:11:34,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:11:34,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:11:34,122 INFO L87 Difference]: Start difference. First operand 3090 states and 4701 transitions. Second operand 5 states. [2020-10-28 18:11:37,389 WARN L193 SmtUtils]: Spent 687.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 18:11:38,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:11:38,935 INFO L93 Difference]: Finished difference Result 8149 states and 12417 transitions. [2020-10-28 18:11:38,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:11:38,936 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 153 [2020-10-28 18:11:38,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:11:38,964 INFO L225 Difference]: With dead ends: 8149 [2020-10-28 18:11:38,964 INFO L226 Difference]: Without dead ends: 5364 [2020-10-28 18:11:38,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:11:38,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5364 states. [2020-10-28 18:11:39,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5364 to 5361. [2020-10-28 18:11:39,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5361 states. [2020-10-28 18:11:39,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5361 states to 5361 states and 8035 transitions. [2020-10-28 18:11:39,329 INFO L78 Accepts]: Start accepts. Automaton has 5361 states and 8035 transitions. Word has length 153 [2020-10-28 18:11:39,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:11:39,330 INFO L481 AbstractCegarLoop]: Abstraction has 5361 states and 8035 transitions. [2020-10-28 18:11:39,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:11:39,330 INFO L276 IsEmpty]: Start isEmpty. Operand 5361 states and 8035 transitions. [2020-10-28 18:11:39,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-28 18:11:39,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:11:39,337 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:11:39,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 18:11:39,337 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:11:39,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:11:39,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1841795160, now seen corresponding path program 1 times [2020-10-28 18:11:39,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:11:39,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1903339289] [2020-10-28 18:11:39,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:11:39,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:11:39,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:39,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:39,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:39,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:39,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:40,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:40,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:40,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:40,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:40,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:41,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:41,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:44,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:11:44,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-10-28 18:11:44,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:11:44,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 18:11:44,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:11:44,411 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:11:44,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:11:44,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:11:44,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-10-28 18:11:44,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:11:45,204 WARN L193 SmtUtils]: Spent 651.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 18:11:45,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:11:45,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:11:45,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:45,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:11:45,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:11:45,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:11:45,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 18:11:45,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:11:45,222 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:11:45,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:11:45,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:11:45,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:11:45,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:11:45,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:11:45,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1903339289] [2020-10-28 18:11:45,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:11:45,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:11:45,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905339441] [2020-10-28 18:11:45,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:11:45,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:11:45,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:11:45,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:11:45,294 INFO L87 Difference]: Start difference. First operand 5361 states and 8035 transitions. Second operand 5 states. [2020-10-28 18:11:48,662 WARN L193 SmtUtils]: Spent 709.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 18:11:50,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:11:50,450 INFO L93 Difference]: Finished difference Result 15203 states and 22866 transitions. [2020-10-28 18:11:50,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:11:50,451 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 154 [2020-10-28 18:11:50,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:11:50,507 INFO L225 Difference]: With dead ends: 15203 [2020-10-28 18:11:50,507 INFO L226 Difference]: Without dead ends: 10355 [2020-10-28 18:11:50,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:11:50,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10355 states. [2020-10-28 18:11:51,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10355 to 10352. [2020-10-28 18:11:51,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10352 states. [2020-10-28 18:11:51,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10352 states to 10352 states and 15345 transitions. [2020-10-28 18:11:51,520 INFO L78 Accepts]: Start accepts. Automaton has 10352 states and 15345 transitions. Word has length 154 [2020-10-28 18:11:51,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:11:51,520 INFO L481 AbstractCegarLoop]: Abstraction has 10352 states and 15345 transitions. [2020-10-28 18:11:51,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:11:51,520 INFO L276 IsEmpty]: Start isEmpty. Operand 10352 states and 15345 transitions. [2020-10-28 18:11:51,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-28 18:11:51,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:11:51,531 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:11:51,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 18:11:51,531 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:11:51,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:11:51,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1432270516, now seen corresponding path program 1 times [2020-10-28 18:11:51,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:11:51,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1721566428] [2020-10-28 18:11:51,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:11:51,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:11:51,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:51,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:51,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:51,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:51,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:51,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:51,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:51,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:56,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:11:56,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-28 18:11:56,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:11:56,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 18:11:56,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:11:56,581 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:11:56,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:11:56,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:11:56,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-28 18:11:56,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:11:57,308 WARN L193 SmtUtils]: Spent 644.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 18:11:57,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:11:57,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:11:57,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:57,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:11:57,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:11:57,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:11:57,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 18:11:57,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:11:57,325 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:11:57,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:11:57,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:11:57,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:11:57,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:11:57,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:11:57,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1721566428] [2020-10-28 18:11:57,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:11:57,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:11:57,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131686829] [2020-10-28 18:11:57,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:11:57,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:11:57,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:11:57,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:11:57,372 INFO L87 Difference]: Start difference. First operand 10352 states and 15345 transitions. Second operand 5 states. [2020-10-28 18:12:00,694 WARN L193 SmtUtils]: Spent 690.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 18:12:02,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:12:02,737 INFO L93 Difference]: Finished difference Result 30315 states and 44855 transitions. [2020-10-28 18:12:02,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:12:02,737 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 155 [2020-10-28 18:12:02,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:12:02,805 INFO L225 Difference]: With dead ends: 30315 [2020-10-28 18:12:02,806 INFO L226 Difference]: Without dead ends: 19976 [2020-10-28 18:12:02,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:12:02,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19976 states. [2020-10-28 18:12:04,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19976 to 19973. [2020-10-28 18:12:04,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19973 states. [2020-10-28 18:12:04,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19973 states to 19973 states and 29250 transitions. [2020-10-28 18:12:04,421 INFO L78 Accepts]: Start accepts. Automaton has 19973 states and 29250 transitions. Word has length 155 [2020-10-28 18:12:04,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:12:04,421 INFO L481 AbstractCegarLoop]: Abstraction has 19973 states and 29250 transitions. [2020-10-28 18:12:04,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:12:04,422 INFO L276 IsEmpty]: Start isEmpty. Operand 19973 states and 29250 transitions. [2020-10-28 18:12:04,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-28 18:12:04,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:12:04,441 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:12:04,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 18:12:04,441 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:12:04,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:12:04,442 INFO L82 PathProgramCache]: Analyzing trace with hash -526816648, now seen corresponding path program 1 times [2020-10-28 18:12:04,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:12:04,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2134519747] [2020-10-28 18:12:04,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:12:04,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:12:04,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:04,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:04,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:04,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:04,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:04,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:09,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:12:09,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-28 18:12:09,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 18:12:09,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 18:12:09,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:12:09,476 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:12:09,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:12:09,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 18:12:09,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 18:12:09,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:12:10,269 WARN L193 SmtUtils]: Spent 719.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 18:12:10,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:12:10,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:12:10,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:10,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:12:10,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:12:10,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:12:10,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 18:12:10,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:12:10,286 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:12:10,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:12:10,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:12:10,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:12:10,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:12:10,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:12:10,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2134519747] [2020-10-28 18:12:10,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:12:10,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:12:10,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453614952] [2020-10-28 18:12:10,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:12:10,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:12:10,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:12:10,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:12:10,315 INFO L87 Difference]: Start difference. First operand 19973 states and 29250 transitions. Second operand 5 states. [2020-10-28 18:12:13,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:12:13,315 INFO L93 Difference]: Finished difference Result 34890 states and 51119 transitions. [2020-10-28 18:12:13,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:12:13,316 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 156 [2020-10-28 18:12:13,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:12:13,355 INFO L225 Difference]: With dead ends: 34890 [2020-10-28 18:12:13,355 INFO L226 Difference]: Without dead ends: 15328 [2020-10-28 18:12:13,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:12:13,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15328 states. [2020-10-28 18:12:14,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15328 to 15328. [2020-10-28 18:12:14,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15328 states. [2020-10-28 18:12:14,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15328 states to 15328 states and 22356 transitions. [2020-10-28 18:12:14,354 INFO L78 Accepts]: Start accepts. Automaton has 15328 states and 22356 transitions. Word has length 156 [2020-10-28 18:12:14,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:12:14,354 INFO L481 AbstractCegarLoop]: Abstraction has 15328 states and 22356 transitions. [2020-10-28 18:12:14,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:12:14,354 INFO L276 IsEmpty]: Start isEmpty. Operand 15328 states and 22356 transitions. [2020-10-28 18:12:14,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-28 18:12:14,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:12:14,371 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:12:14,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 18:12:14,371 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:12:14,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:12:14,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1156919153, now seen corresponding path program 1 times [2020-10-28 18:12:14,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:12:14,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [965014944] [2020-10-28 18:12:14,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:12:14,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:12:14,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:14,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:14,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:14,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:14,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:14,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:14,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:16,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:19,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:12:19,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-28 18:12:19,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:12:19,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 18:12:19,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:12:19,424 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:12:19,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:12:19,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:12:19,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-28 18:12:19,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:12:20,228 WARN L193 SmtUtils]: Spent 669.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 18:12:20,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:12:20,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:12:20,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:20,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:12:20,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:12:20,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:12:20,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 18:12:20,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:12:20,244 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:12:20,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:12:20,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:12:20,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:12:20,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:12:20,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:12:20,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [965014944] [2020-10-28 18:12:20,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:12:20,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:12:20,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485194867] [2020-10-28 18:12:20,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:12:20,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:12:20,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:12:20,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:12:20,300 INFO L87 Difference]: Start difference. First operand 15328 states and 22356 transitions. Second operand 5 states. [2020-10-28 18:12:24,083 WARN L193 SmtUtils]: Spent 700.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 18:12:26,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:12:26,686 INFO L93 Difference]: Finished difference Result 39447 states and 57647 transitions. [2020-10-28 18:12:26,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:12:26,687 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 163 [2020-10-28 18:12:26,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:12:26,737 INFO L225 Difference]: With dead ends: 39447 [2020-10-28 18:12:26,737 INFO L226 Difference]: Without dead ends: 24961 [2020-10-28 18:12:26,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:12:26,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24961 states. [2020-10-28 18:12:28,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24961 to 24957. [2020-10-28 18:12:28,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24957 states. [2020-10-28 18:12:28,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24957 states to 24957 states and 35871 transitions. [2020-10-28 18:12:28,737 INFO L78 Accepts]: Start accepts. Automaton has 24957 states and 35871 transitions. Word has length 163 [2020-10-28 18:12:28,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:12:28,737 INFO L481 AbstractCegarLoop]: Abstraction has 24957 states and 35871 transitions. [2020-10-28 18:12:28,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:12:28,738 INFO L276 IsEmpty]: Start isEmpty. Operand 24957 states and 35871 transitions. [2020-10-28 18:12:28,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-10-28 18:12:28,758 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:12:28,758 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:12:28,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 18:12:28,758 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:12:28,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:12:28,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1362381054, now seen corresponding path program 1 times [2020-10-28 18:12:28,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:12:28,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031792653] [2020-10-28 18:12:28,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:12:28,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:12:28,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:28,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:28,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:28,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:28,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:28,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:31,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:31,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:33,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:12:33,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-28 18:12:33,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:12:33,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 18:12:33,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:12:33,786 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:12:33,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:12:33,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 18:12:33,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 18:12:33,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:12:34,560 WARN L193 SmtUtils]: Spent 664.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 18:12:34,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:12:34,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:12:34,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:34,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:12:34,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:12:34,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:12:34,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 18:12:34,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:12:34,579 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:12:34,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:12:34,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:12:34,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:12:34,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:12:34,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:12:34,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031792653] [2020-10-28 18:12:34,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:12:34,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:12:34,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978120156] [2020-10-28 18:12:34,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:12:34,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:12:34,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:12:34,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:12:34,630 INFO L87 Difference]: Start difference. First operand 24957 states and 35871 transitions. Second operand 5 states. [2020-10-28 18:12:38,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:12:38,049 INFO L93 Difference]: Finished difference Result 43461 states and 62461 transitions. [2020-10-28 18:12:38,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:12:38,050 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 164 [2020-10-28 18:12:38,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:12:38,087 INFO L225 Difference]: With dead ends: 43461 [2020-10-28 18:12:38,087 INFO L226 Difference]: Without dead ends: 18605 [2020-10-28 18:12:38,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:12:38,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18605 states. [2020-10-28 18:12:39,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18605 to 18605. [2020-10-28 18:12:39,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18605 states. [2020-10-28 18:12:39,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18605 states to 18605 states and 26730 transitions. [2020-10-28 18:12:39,592 INFO L78 Accepts]: Start accepts. Automaton has 18605 states and 26730 transitions. Word has length 164 [2020-10-28 18:12:39,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:12:39,592 INFO L481 AbstractCegarLoop]: Abstraction has 18605 states and 26730 transitions. [2020-10-28 18:12:39,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:12:39,592 INFO L276 IsEmpty]: Start isEmpty. Operand 18605 states and 26730 transitions. [2020-10-28 18:12:39,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-10-28 18:12:39,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:12:39,607 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:12:39,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 18:12:39,607 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:12:39,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:12:39,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1763324864, now seen corresponding path program 1 times [2020-10-28 18:12:39,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:12:39,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [751284678] [2020-10-28 18:12:39,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:12:39,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:12:39,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:39,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:39,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:39,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:39,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:39,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:39,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:40,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:42,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:42,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:42,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:44,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:12:44,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 180 [2020-10-28 18:12:44,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 18:12:44,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 18:12:44,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:12:44,637 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:12:44,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:12:44,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:12:44,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-28 18:12:44,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:12:45,487 WARN L193 SmtUtils]: Spent 667.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 18:12:45,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:12:45,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:12:45,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:45,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:12:45,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:12:45,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:12:45,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 18:12:45,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:12:45,504 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:12:45,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:12:45,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:12:45,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:12:45,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:12:45,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:12:45,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [751284678] [2020-10-28 18:12:45,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:12:45,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:12:45,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741524407] [2020-10-28 18:12:45,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:12:45,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:12:45,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:12:45,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:12:45,550 INFO L87 Difference]: Start difference. First operand 18605 states and 26730 transitions. Second operand 5 states. [2020-10-28 18:12:46,259 WARN L193 SmtUtils]: Spent 655.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 18:12:51,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:12:51,578 INFO L93 Difference]: Finished difference Result 32876 states and 47242 transitions. [2020-10-28 18:12:51,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:12:51,579 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 172 [2020-10-28 18:12:51,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:12:51,603 INFO L225 Difference]: With dead ends: 32876 [2020-10-28 18:12:51,604 INFO L226 Difference]: Without dead ends: 18608 [2020-10-28 18:12:51,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:12:51,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18608 states. [2020-10-28 18:12:53,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18608 to 18605. [2020-10-28 18:12:53,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18605 states. [2020-10-28 18:12:53,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18605 states to 18605 states and 26613 transitions. [2020-10-28 18:12:53,249 INFO L78 Accepts]: Start accepts. Automaton has 18605 states and 26613 transitions. Word has length 172 [2020-10-28 18:12:53,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:12:53,249 INFO L481 AbstractCegarLoop]: Abstraction has 18605 states and 26613 transitions. [2020-10-28 18:12:53,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:12:53,249 INFO L276 IsEmpty]: Start isEmpty. Operand 18605 states and 26613 transitions. [2020-10-28 18:12:53,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-28 18:12:53,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:12:53,259 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:12:53,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 18:12:53,260 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:12:53,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:12:53,260 INFO L82 PathProgramCache]: Analyzing trace with hash -994012952, now seen corresponding path program 1 times [2020-10-28 18:12:53,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:12:53,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [191998537] [2020-10-28 18:12:53,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:12:53,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:12:53,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:53,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:53,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:53,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:53,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:53,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:54,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:57,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:58,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:58,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:12:58,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-10-28 18:12:58,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 18:12:58,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 18:12:58,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:12:58,302 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:12:58,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:12:58,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-28 18:12:58,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-28 18:12:58,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:12:59,014 WARN L193 SmtUtils]: Spent 659.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 18:12:59,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:12:59,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:12:59,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:59,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:12:59,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:12:59,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:12:59,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 18:12:59,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:12:59,030 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:12:59,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:12:59,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:12:59,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:12:59,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:12:59,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:12:59,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [191998537] [2020-10-28 18:12:59,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:12:59,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:12:59,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298548960] [2020-10-28 18:12:59,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:12:59,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:12:59,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:12:59,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:12:59,064 INFO L87 Difference]: Start difference. First operand 18605 states and 26613 transitions. Second operand 4 states. [2020-10-28 18:12:59,821 WARN L193 SmtUtils]: Spent 698.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 18:13:05,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:13:05,238 INFO L93 Difference]: Finished difference Result 51161 states and 74052 transitions. [2020-10-28 18:13:05,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:13:05,239 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 173 [2020-10-28 18:13:05,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:13:05,290 INFO L225 Difference]: With dead ends: 51161 [2020-10-28 18:13:05,290 INFO L226 Difference]: Without dead ends: 35536 [2020-10-28 18:13:05,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:13:05,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35536 states. [2020-10-28 18:13:08,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35536 to 35533. [2020-10-28 18:13:08,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35533 states. [2020-10-28 18:13:08,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35533 states to 35533 states and 50700 transitions. [2020-10-28 18:13:08,541 INFO L78 Accepts]: Start accepts. Automaton has 35533 states and 50700 transitions. Word has length 173 [2020-10-28 18:13:08,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:13:08,541 INFO L481 AbstractCegarLoop]: Abstraction has 35533 states and 50700 transitions. [2020-10-28 18:13:08,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:13:08,546 INFO L276 IsEmpty]: Start isEmpty. Operand 35533 states and 50700 transitions. [2020-10-28 18:13:08,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-28 18:13:08,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:13:08,567 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:13:08,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 18:13:08,568 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:13:08,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:13:08,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1605402355, now seen corresponding path program 1 times [2020-10-28 18:13:08,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:13:08,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1718724628] [2020-10-28 18:13:08,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:13:08,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:13:08,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:08,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:08,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:08,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:08,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:08,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:11,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:13,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:13:13,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-10-28 18:13:13,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:13:13,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 18:13:13,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:13:13,619 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:13:13,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:13:13,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:13:13,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-28 18:13:13,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:13:14,377 WARN L193 SmtUtils]: Spent 682.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 18:13:14,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:13:14,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:13:14,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:14,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:13:14,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:13:14,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:13:14,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 18:13:14,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:13:14,405 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:13:14,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:13:14,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:13:14,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:13:14,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:13:14,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:13:14,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1718724628] [2020-10-28 18:13:14,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:13:14,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:13:14,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951549194] [2020-10-28 18:13:14,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:13:14,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:13:14,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:13:14,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:13:14,441 INFO L87 Difference]: Start difference. First operand 35533 states and 50700 transitions. Second operand 6 states. [2020-10-28 18:13:15,272 WARN L193 SmtUtils]: Spent 743.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 18:13:20,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:13:20,618 INFO L93 Difference]: Finished difference Result 69978 states and 100172 transitions. [2020-10-28 18:13:20,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 18:13:20,619 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 173 [2020-10-28 18:13:20,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:13:20,663 INFO L225 Difference]: With dead ends: 69978 [2020-10-28 18:13:20,664 INFO L226 Difference]: Without dead ends: 35533 [2020-10-28 18:13:20,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:13:20,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35533 states. [2020-10-28 18:13:24,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35533 to 35533. [2020-10-28 18:13:24,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35533 states. [2020-10-28 18:13:24,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35533 states to 35533 states and 50088 transitions. [2020-10-28 18:13:24,078 INFO L78 Accepts]: Start accepts. Automaton has 35533 states and 50088 transitions. Word has length 173 [2020-10-28 18:13:24,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:13:24,078 INFO L481 AbstractCegarLoop]: Abstraction has 35533 states and 50088 transitions. [2020-10-28 18:13:24,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:13:24,078 INFO L276 IsEmpty]: Start isEmpty. Operand 35533 states and 50088 transitions. [2020-10-28 18:13:24,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-28 18:13:24,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:13:24,094 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:13:24,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 18:13:24,094 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:13:24,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:13:24,095 INFO L82 PathProgramCache]: Analyzing trace with hash -2025999261, now seen corresponding path program 1 times [2020-10-28 18:13:24,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:13:24,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292542701] [2020-10-28 18:13:24,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:13:24,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:13:24,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:24,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:24,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:25,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:29,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:13:29,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-10-28 18:13:29,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 18:13:29,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-28 18:13:29,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:13:29,180 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:13:29,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:13:29,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 18:13:29,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 18:13:29,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:13:29,952 WARN L193 SmtUtils]: Spent 671.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 18:13:29,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:13:29,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:13:29,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:29,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:13:29,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:13:29,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:13:29,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 18:13:29,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:13:29,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:13:29,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:13:29,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:13:29,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:13:29,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:13:30,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:13:30,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [292542701] [2020-10-28 18:13:30,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:13:30,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:13:30,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412336975] [2020-10-28 18:13:30,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:13:30,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:13:30,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:13:30,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:13:30,003 INFO L87 Difference]: Start difference. First operand 35533 states and 50088 transitions. Second operand 5 states. [2020-10-28 18:13:34,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:13:34,754 INFO L93 Difference]: Finished difference Result 64339 states and 90608 transitions. [2020-10-28 18:13:34,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:13:34,755 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 173 [2020-10-28 18:13:34,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:13:34,791 INFO L225 Difference]: With dead ends: 64339 [2020-10-28 18:13:34,791 INFO L226 Difference]: Without dead ends: 29123 [2020-10-28 18:13:34,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:13:34,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29123 states. [2020-10-28 18:13:37,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29123 to 29123. [2020-10-28 18:13:37,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29123 states. [2020-10-28 18:13:37,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29123 states to 29123 states and 40870 transitions. [2020-10-28 18:13:37,718 INFO L78 Accepts]: Start accepts. Automaton has 29123 states and 40870 transitions. Word has length 173 [2020-10-28 18:13:37,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:13:37,718 INFO L481 AbstractCegarLoop]: Abstraction has 29123 states and 40870 transitions. [2020-10-28 18:13:37,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:13:37,718 INFO L276 IsEmpty]: Start isEmpty. Operand 29123 states and 40870 transitions. [2020-10-28 18:13:37,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-10-28 18:13:37,728 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:13:37,728 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:13:37,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 18:13:37,729 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:13:37,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:13:37,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1902657636, now seen corresponding path program 1 times [2020-10-28 18:13:37,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:13:37,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [388329086] [2020-10-28 18:13:37,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:13:37,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:13:37,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:37,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:37,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:37,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:38,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:38,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:38,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:38,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:39,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:40,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:40,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:40,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:40,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:41,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:41,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:41,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:41,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:42,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:42,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:42,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:13:42,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 187 [2020-10-28 18:13:42,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-28 18:13:42,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 18:13:42,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:13:42,780 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:13:42,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:13:42,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 18:13:42,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 18:13:42,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:13:43,565 WARN L193 SmtUtils]: Spent 682.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 18:13:43,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:13:43,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:13:43,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:43,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:13:43,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:13:43,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:13:43,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 18:13:43,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:13:43,583 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:13:43,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:13:43,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:13:43,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:13:43,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:13:43,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:13:43,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [388329086] [2020-10-28 18:13:43,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:13:43,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:13:43,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184226277] [2020-10-28 18:13:43,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:13:43,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:13:43,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:13:43,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:13:43,632 INFO L87 Difference]: Start difference. First operand 29123 states and 40870 transitions. Second operand 5 states. [2020-10-28 18:13:47,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:13:47,989 INFO L93 Difference]: Finished difference Result 50112 states and 70244 transitions. [2020-10-28 18:13:47,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:13:47,990 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 179 [2020-10-28 18:13:47,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:13:48,020 INFO L225 Difference]: With dead ends: 50112 [2020-10-28 18:13:48,020 INFO L226 Difference]: Without dead ends: 25213 [2020-10-28 18:13:48,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:13:48,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25213 states. [2020-10-28 18:13:50,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25213 to 25207. [2020-10-28 18:13:50,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25207 states. [2020-10-28 18:13:50,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25207 states to 25207 states and 35337 transitions. [2020-10-28 18:13:50,535 INFO L78 Accepts]: Start accepts. Automaton has 25207 states and 35337 transitions. Word has length 179 [2020-10-28 18:13:50,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:13:50,535 INFO L481 AbstractCegarLoop]: Abstraction has 25207 states and 35337 transitions. [2020-10-28 18:13:50,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:13:50,535 INFO L276 IsEmpty]: Start isEmpty. Operand 25207 states and 35337 transitions. [2020-10-28 18:13:50,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-10-28 18:13:50,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:13:50,543 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:13:50,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 18:13:50,543 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:13:50,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:13:50,543 INFO L82 PathProgramCache]: Analyzing trace with hash 501432251, now seen corresponding path program 1 times [2020-10-28 18:13:50,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:13:50,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1591061289] [2020-10-28 18:13:50,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:13:50,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:13:50,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:50,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:50,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:50,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:50,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:50,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:50,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:51,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:52,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:52,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:52,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:53,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:53,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:55,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:55,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:13:55,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 188 [2020-10-28 18:13:55,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 18:13:55,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 18:13:55,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:13:55,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:13:55,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:13:55,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-28 18:13:55,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-28 18:13:55,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:13:56,390 WARN L193 SmtUtils]: Spent 744.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 18:13:56,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:13:56,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:13:56,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:56,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:13:56,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:13:56,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:13:56,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 18:13:56,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:13:56,404 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:13:56,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:13:56,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:13:56,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:13:56,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:13:56,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:13:56,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1591061289] [2020-10-28 18:13:56,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:13:56,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:13:56,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69005412] [2020-10-28 18:13:56,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:13:56,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:13:56,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:13:56,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:13:56,439 INFO L87 Difference]: Start difference. First operand 25207 states and 35337 transitions. Second operand 5 states. [2020-10-28 18:13:57,199 WARN L193 SmtUtils]: Spent 694.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 18:14:01,044 WARN L193 SmtUtils]: Spent 678.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-28 18:14:05,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:14:05,564 INFO L93 Difference]: Finished difference Result 65578 states and 94212 transitions. [2020-10-28 18:14:05,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 18:14:05,565 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 180 [2020-10-28 18:14:05,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:14:05,611 INFO L225 Difference]: With dead ends: 65578 [2020-10-28 18:14:05,611 INFO L226 Difference]: Without dead ends: 43953 [2020-10-28 18:14:05,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:14:05,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43953 states. [2020-10-28 18:14:08,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43953 to 34577. [2020-10-28 18:14:08,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34577 states. [2020-10-28 18:14:08,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34577 states to 34577 states and 48969 transitions. [2020-10-28 18:14:08,993 INFO L78 Accepts]: Start accepts. Automaton has 34577 states and 48969 transitions. Word has length 180 [2020-10-28 18:14:08,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:14:08,993 INFO L481 AbstractCegarLoop]: Abstraction has 34577 states and 48969 transitions. [2020-10-28 18:14:08,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:14:08,993 INFO L276 IsEmpty]: Start isEmpty. Operand 34577 states and 48969 transitions. [2020-10-28 18:14:09,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-10-28 18:14:09,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:14:09,010 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:14:09,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 18:14:09,011 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:14:09,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:14:09,012 INFO L82 PathProgramCache]: Analyzing trace with hash -96399626, now seen corresponding path program 1 times [2020-10-28 18:14:09,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:14:09,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765317113] [2020-10-28 18:14:09,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:14:09,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:14:09,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:09,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:09,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:09,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:09,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:09,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:10,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:10,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:10,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:10,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:14,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:14:14,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 188 [2020-10-28 18:14:14,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 18:14:14,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 18:14:14,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:14:14,039 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:14:14,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:14:14,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 18:14:14,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 18:14:14,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:14:14,757 WARN L193 SmtUtils]: Spent 681.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 18:14:14,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:14:14,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:14:14,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:14,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:14:14,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:14:14,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:14:14,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 18:14:14,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:14:14,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:14:14,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:14:14,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:14:14,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:14:14,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:14:14,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:14:14,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [765317113] [2020-10-28 18:14:14,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:14:14,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:14:14,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293816878] [2020-10-28 18:14:14,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:14:14,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:14:14,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:14:14,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:14:14,800 INFO L87 Difference]: Start difference. First operand 34577 states and 48969 transitions. Second operand 4 states.