/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_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 19:05:36,156 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 19:05:36,158 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 19:05:36,202 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 19:05:36,203 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 19:05:36,205 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 19:05:36,206 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 19:05:36,209 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 19:05:36,211 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 19:05:36,212 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 19:05:36,214 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 19:05:36,215 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 19:05:36,216 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 19:05:36,217 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 19:05:36,218 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 19:05:36,220 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 19:05:36,221 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 19:05:36,222 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 19:05:36,231 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 19:05:36,234 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 19:05:36,235 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 19:05:36,254 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 19:05:36,255 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 19:05:36,256 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 19:05:36,261 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 19:05:36,265 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 19:05:36,265 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 19:05:36,267 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 19:05:36,268 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 19:05:36,269 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 19:05:36,270 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 19:05:36,271 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 19:05:36,273 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 19:05:36,276 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 19:05:36,277 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 19:05:36,278 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 19:05:36,279 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 19:05:36,279 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 19:05:36,279 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 19:05:36,280 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 19:05:36,282 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 19:05:36,283 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 19:05:36,337 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 19:05:36,338 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 19:05:36,342 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 19:05:36,343 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 19:05:36,343 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 19:05:36,343 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 19:05:36,343 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 19:05:36,344 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 19:05:36,344 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 19:05:36,344 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 19:05:36,345 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 19:05:36,345 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 19:05:36,345 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 19:05:36,346 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 19:05:36,346 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 19:05:36,346 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 19:05:36,346 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 19:05:36,346 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 19:05:36,347 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 19:05:36,347 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 19:05:36,347 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 19:05:36,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 19:05:36,348 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 19:05:36,348 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 19:05:36,348 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 19:05:36,348 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 19:05:36,348 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 19:05:36,348 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 19:05:36,349 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 19:05:36,349 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 19:05:36,801 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 19:05:36,829 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 19:05:36,832 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 19:05:36,833 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 19:05:36,834 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 19:05:36,835 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-28 19:05:36,907 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/92fa690c6/3d1878496ffd42ba96d3bff894966526/FLAG01b8ff98e [2020-10-28 19:05:37,808 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 19:05:37,809 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-28 19:05:37,848 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/92fa690c6/3d1878496ffd42ba96d3bff894966526/FLAG01b8ff98e [2020-10-28 19:05:38,332 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/92fa690c6/3d1878496ffd42ba96d3bff894966526 [2020-10-28 19:05:38,335 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 19:05:38,342 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 19:05:38,344 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 19:05:38,344 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 19:05:38,348 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 19:05:38,349 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:05:38" (1/1) ... [2020-10-28 19:05:38,352 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e011e0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:05:38, skipping insertion in model container [2020-10-28 19:05:38,352 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:05:38" (1/1) ... [2020-10-28 19:05:38,361 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 19:05:38,533 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 19:05:40,097 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:05:40,123 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 19:05:40,681 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:05:40,731 INFO L208 MainTranslator]: Completed translation [2020-10-28 19:05:40,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:05:40 WrapperNode [2020-10-28 19:05:40,732 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 19:05:40,734 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 19:05:40,734 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 19:05:40,734 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 19:05:40,749 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:05:40" (1/1) ... [2020-10-28 19:05:40,752 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:05:40" (1/1) ... [2020-10-28 19:05:40,836 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:05:40" (1/1) ... [2020-10-28 19:05:40,837 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:05:40" (1/1) ... [2020-10-28 19:05:40,945 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:05:40" (1/1) ... [2020-10-28 19:05:40,983 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:05:40" (1/1) ... [2020-10-28 19:05:41,000 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:05:40" (1/1) ... [2020-10-28 19:05:41,027 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 19:05:41,028 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 19:05:41,029 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 19:05:41,029 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 19:05:41,030 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:05:40" (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 19:05:41,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 19:05:41,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 19:05:41,109 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 19:05:41,110 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 19:05:41,110 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 19:05:41,110 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 19:05:41,110 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 19:05:41,110 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 19:05:41,110 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 19:05:41,111 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 19:05:41,111 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 19:05:41,111 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 19:05:41,111 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 19:05:41,111 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 19:05:41,111 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 19:05:41,111 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 19:05:41,112 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 19:05:41,112 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 19:05:41,112 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 19:05:41,112 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 19:05:41,112 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-28 19:05:41,112 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 19:05:41,113 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 19:05:41,113 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 19:05:41,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 19:05:41,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 19:05:41,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 19:05:41,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 19:05:41,113 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 19:05:41,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 19:05:45,884 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 19:05:45,885 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 19:05:45,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:05:45 BoogieIcfgContainer [2020-10-28 19:05:45,892 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 19:05:45,896 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 19:05:45,897 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 19:05:45,901 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 19:05:45,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 07:05:38" (1/3) ... [2020-10-28 19:05:45,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73b36691 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:05:45, skipping insertion in model container [2020-10-28 19:05:45,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:05:40" (2/3) ... [2020-10-28 19:05:45,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73b36691 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:05:45, skipping insertion in model container [2020-10-28 19:05:45,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:05:45" (3/3) ... [2020-10-28 19:05:45,906 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-28 19:05:45,920 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 19:05:45,931 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 19:05:45,949 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 19:05:46,005 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 19:05:46,005 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 19:05:46,005 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 19:05:46,006 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 19:05:46,006 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 19:05:46,006 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 19:05:46,006 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 19:05:46,006 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 19:05:46,066 INFO L276 IsEmpty]: Start isEmpty. Operand 1760 states. [2020-10-28 19:05:46,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-28 19:05:46,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:05:46,109 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:05:46,110 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:05:46,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:05:46,119 INFO L82 PathProgramCache]: Analyzing trace with hash -634912560, now seen corresponding path program 1 times [2020-10-28 19:05:46,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:05:46,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1507746906] [2020-10-28 19:05:46,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:05:46,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:05:46,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:47,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:47,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:48,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:48,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:49,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:51,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:05:51,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 19:05:51,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 19:05:51,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-28 19:05:51,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:05:51,708 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:05:51,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 19:05:51,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 19:05:51,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-28 19:05:51,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 19:05:54,061 WARN L193 SmtUtils]: Spent 2.00 s on a formula simplification that was a NOOP. DAG size: 649 [2020-10-28 19:05:54,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:05:54,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:05:54,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:54,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:05:54,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:05:54,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:05:54,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-10-28 19:05:54,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:05:54,207 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:05:54,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:05:54,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:05:54,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 19:05:54,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:05:54,298 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 19:05:54,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1507746906] [2020-10-28 19:05:54,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:05:54,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 19:05:54,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948158721] [2020-10-28 19:05:54,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 19:05:54,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:05:54,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 19:05:54,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 19:05:54,325 INFO L87 Difference]: Start difference. First operand 1760 states. Second operand 8 states. [2020-10-28 19:05:56,448 WARN L193 SmtUtils]: Spent 1.97 s on a formula simplification that was a NOOP. DAG size: 653 [2020-10-28 19:06:17,773 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 656 [2020-10-28 19:06:21,636 WARN L193 SmtUtils]: Spent 1.92 s on a formula simplification that was a NOOP. DAG size: 655 [2020-10-28 19:06:21,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:06:21,803 INFO L93 Difference]: Finished difference Result 2493 states and 4329 transitions. [2020-10-28 19:06:21,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 19:06:21,808 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 80 [2020-10-28 19:06:21,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:06:21,875 INFO L225 Difference]: With dead ends: 2493 [2020-10-28 19:06:21,876 INFO L226 Difference]: Without dead ends: 2301 [2020-10-28 19:06:21,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-28 19:06:21,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2020-10-28 19:06:22,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 1766. [2020-10-28 19:06:22,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1766 states. [2020-10-28 19:06:22,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1766 states to 1766 states and 2347 transitions. [2020-10-28 19:06:22,097 INFO L78 Accepts]: Start accepts. Automaton has 1766 states and 2347 transitions. Word has length 80 [2020-10-28 19:06:22,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:06:22,100 INFO L481 AbstractCegarLoop]: Abstraction has 1766 states and 2347 transitions. [2020-10-28 19:06:22,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 19:06:22,100 INFO L276 IsEmpty]: Start isEmpty. Operand 1766 states and 2347 transitions. [2020-10-28 19:06:22,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-28 19:06:22,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:06:22,111 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:06:22,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 19:06:22,111 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:06:22,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:06:22,115 INFO L82 PathProgramCache]: Analyzing trace with hash 57820061, now seen corresponding path program 1 times [2020-10-28 19:06:22,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:06:22,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78453103] [2020-10-28 19:06:22,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:06:22,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:06:22,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:22,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:22,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:23,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:24,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:24,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:24,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:25,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:26,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:27,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:06:27,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 19:06:27,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 19:06:27,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 19:06:27,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:06:27,241 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:06:27,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 19:06:27,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 19:06:27,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-28 19:06:27,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:06:29,502 WARN L193 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 649 [2020-10-28 19:06:29,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:06:29,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:06:29,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:29,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:06:29,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:06:29,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:06:29,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-28 19:06:29,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:06:29,612 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:06:29,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:06:29,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:06:29,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 19:06:29,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:06:29,708 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 19:06:29,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [78453103] [2020-10-28 19:06:29,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:06:29,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:06:29,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960953202] [2020-10-28 19:06:29,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 19:06:29,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:06:29,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 19:06:29,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 19:06:29,724 INFO L87 Difference]: Start difference. First operand 1766 states and 2347 transitions. Second operand 6 states. [2020-10-28 19:06:31,898 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 657 [2020-10-28 19:06:44,681 WARN L193 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 655 [2020-10-28 19:06:45,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:06:45,884 INFO L93 Difference]: Finished difference Result 2617 states and 3545 transitions. [2020-10-28 19:06:45,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 19:06:45,885 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 80 [2020-10-28 19:06:45,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:06:45,894 INFO L225 Difference]: With dead ends: 2617 [2020-10-28 19:06:45,894 INFO L226 Difference]: Without dead ends: 1669 [2020-10-28 19:06:45,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-28 19:06:45,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1669 states. [2020-10-28 19:06:45,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1669 to 1662. [2020-10-28 19:06:45,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1662 states. [2020-10-28 19:06:45,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 2222 transitions. [2020-10-28 19:06:45,985 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 2222 transitions. Word has length 80 [2020-10-28 19:06:45,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:06:45,988 INFO L481 AbstractCegarLoop]: Abstraction has 1662 states and 2222 transitions. [2020-10-28 19:06:45,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 19:06:45,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 2222 transitions. [2020-10-28 19:06:45,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-28 19:06:45,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:06:45,993 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:06:45,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 19:06:45,993 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:06:45,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:06:45,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1885023108, now seen corresponding path program 1 times [2020-10-28 19:06:45,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:06:45,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669543623] [2020-10-28 19:06:45,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:06:46,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:06:46,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:46,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:46,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:47,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:48,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:48,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:48,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:49,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:50,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:51,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:06:51,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 19:06:51,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 19:06:51,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 19:06:51,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:06:51,137 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:06:51,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:06:51,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-28 19:06:51,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 19:06:51,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:06:53,216 WARN L193 SmtUtils]: Spent 1.92 s on a formula simplification that was a NOOP. DAG size: 649 [2020-10-28 19:06:53,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:06:53,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:06:53,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:53,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:06:53,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:06:53,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:06:53,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-28 19:06:53,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:06:53,270 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:06:53,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:06:53,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:06:53,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:06:53,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:06:53,317 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 19:06:53,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669543623] [2020-10-28 19:06:53,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:06:53,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:06:53,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700409445] [2020-10-28 19:06:53,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:06:53,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:06:53,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:06:53,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:06:53,320 INFO L87 Difference]: Start difference. First operand 1662 states and 2222 transitions. Second operand 4 states. [2020-10-28 19:06:55,369 WARN L193 SmtUtils]: Spent 1.95 s on a formula simplification that was a NOOP. DAG size: 653 [2020-10-28 19:07:06,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:07:06,432 INFO L93 Difference]: Finished difference Result 2541 states and 3542 transitions. [2020-10-28 19:07:06,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:07:06,433 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-10-28 19:07:06,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:07:06,444 INFO L225 Difference]: With dead ends: 2541 [2020-10-28 19:07:06,444 INFO L226 Difference]: Without dead ends: 2096 [2020-10-28 19:07:06,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:07:06,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2096 states. [2020-10-28 19:07:06,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2096 to 2088. [2020-10-28 19:07:06,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2088 states. [2020-10-28 19:07:06,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 2856 transitions. [2020-10-28 19:07:06,549 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 2856 transitions. Word has length 80 [2020-10-28 19:07:06,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:07:06,549 INFO L481 AbstractCegarLoop]: Abstraction has 2088 states and 2856 transitions. [2020-10-28 19:07:06,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:07:06,549 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 2856 transitions. [2020-10-28 19:07:06,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-28 19:07:06,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:07:06,554 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:07:06,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 19:07:06,555 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:07:06,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:07:06,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1763562561, now seen corresponding path program 1 times [2020-10-28 19:07:06,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:07:06,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1189563996] [2020-10-28 19:07:06,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:07:06,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:07:06,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:07:06,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:07:06,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:07:07,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:07:08,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:07:11,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:07:11,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 19:07:11,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:07:11,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5069 [2020-10-28 19:07:11,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:07:11,739 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:07:11,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:07:11,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-28 19:07:11,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 19:07:11,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:07:14,070 WARN L193 SmtUtils]: Spent 2.17 s on a formula simplification that was a NOOP. DAG size: 649 [2020-10-28 19:07:14,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:07:14,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:07:14,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:07:14,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:07:14,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:07:14,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:07:14,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-28 19:07:14,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:07:14,124 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:07:14,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:07:14,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:07:14,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:07:14,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:07:14,168 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 19:07:14,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1189563996] [2020-10-28 19:07:14,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:07:14,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:07:14,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305247189] [2020-10-28 19:07:14,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:07:14,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:07:14,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:07:14,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:07:14,171 INFO L87 Difference]: Start difference. First operand 2088 states and 2856 transitions. Second operand 4 states. [2020-10-28 19:07:16,331 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 653 [2020-10-28 19:07:28,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:07:28,475 INFO L93 Difference]: Finished difference Result 3685 states and 5117 transitions. [2020-10-28 19:07:28,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:07:28,476 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-10-28 19:07:28,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:07:28,492 INFO L225 Difference]: With dead ends: 3685 [2020-10-28 19:07:28,492 INFO L226 Difference]: Without dead ends: 3088 [2020-10-28 19:07:28,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:07:28,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3088 states. [2020-10-28 19:07:28,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3088 to 3081. [2020-10-28 19:07:28,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3081 states. [2020-10-28 19:07:28,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3081 states to 3081 states and 4175 transitions. [2020-10-28 19:07:28,642 INFO L78 Accepts]: Start accepts. Automaton has 3081 states and 4175 transitions. Word has length 80 [2020-10-28 19:07:28,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:07:28,643 INFO L481 AbstractCegarLoop]: Abstraction has 3081 states and 4175 transitions. [2020-10-28 19:07:28,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:07:28,643 INFO L276 IsEmpty]: Start isEmpty. Operand 3081 states and 4175 transitions. [2020-10-28 19:07:28,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-28 19:07:28,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:07:28,649 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:07:28,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 19:07:28,649 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:07:28,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:07:28,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1092545620, now seen corresponding path program 1 times [2020-10-28 19:07:28,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:07:28,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787255030] [2020-10-28 19:07:28,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:07:28,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:07:28,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:07:28,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:07:29,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:07:29,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:07:30,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:07:31,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:07:32,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:07:33,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:07:33,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 19:07:33,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 19:07:33,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-28 19:07:33,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:07:33,748 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:07:33,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 19:07:33,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 19:07:33,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-28 19:07:33,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:07:35,982 WARN L193 SmtUtils]: Spent 2.00 s on a formula simplification that was a NOOP. DAG size: 649 [2020-10-28 19:07:35,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:07:36,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:07:36,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:07:36,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:07:36,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:07:36,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:07:36,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-10-28 19:07:36,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:07:36,078 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:07:36,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:07:36,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:07:36,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 19:07:36,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:07:36,136 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 19:07:36,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787255030] [2020-10-28 19:07:36,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:07:36,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 19:07:36,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103451597] [2020-10-28 19:07:36,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 19:07:36,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:07:36,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 19:07:36,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 19:07:36,139 INFO L87 Difference]: Start difference. First operand 3081 states and 4175 transitions. Second operand 8 states. [2020-10-28 19:07:38,375 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification that was a NOOP. DAG size: 654 [2020-10-28 19:07:52,317 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification that was a NOOP. DAG size: 658 [2020-10-28 19:07:56,927 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification that was a NOOP. DAG size: 656 [2020-10-28 19:07:57,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:07:57,170 INFO L93 Difference]: Finished difference Result 8481 states and 12267 transitions. [2020-10-28 19:07:57,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 19:07:57,171 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 80 [2020-10-28 19:07:57,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:07:57,204 INFO L225 Difference]: With dead ends: 8481 [2020-10-28 19:07:57,205 INFO L226 Difference]: Without dead ends: 7298 [2020-10-28 19:07:57,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-28 19:07:57,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7298 states. [2020-10-28 19:07:57,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7298 to 3193. [2020-10-28 19:07:57,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3193 states. [2020-10-28 19:07:57,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3193 states to 3193 states and 4335 transitions. [2020-10-28 19:07:57,468 INFO L78 Accepts]: Start accepts. Automaton has 3193 states and 4335 transitions. Word has length 80 [2020-10-28 19:07:57,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:07:57,469 INFO L481 AbstractCegarLoop]: Abstraction has 3193 states and 4335 transitions. [2020-10-28 19:07:57,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 19:07:57,469 INFO L276 IsEmpty]: Start isEmpty. Operand 3193 states and 4335 transitions. [2020-10-28 19:07:57,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-28 19:07:57,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:07:57,483 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:07:57,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 19:07:57,483 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:07:57,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:07:57,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1400792195, now seen corresponding path program 1 times [2020-10-28 19:07:57,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:07:57,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1539459325] [2020-10-28 19:07:57,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:07:57,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:07:57,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:07:57,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:07:57,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:07:57,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:07:58,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:07:58,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:02,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:08:02,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 19:08:02,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 19:08:02,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-28 19:08:02,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:08:02,612 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:08:02,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:08:02,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-28 19:08:02,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 19:08:02,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:08:04,684 WARN L193 SmtUtils]: Spent 1.96 s on a formula simplification that was a NOOP. DAG size: 649 [2020-10-28 19:08:04,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:08:04,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:08:04,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:04,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:08:04,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:08:04,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:08:04,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-28 19:08:04,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:08:04,734 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:08:04,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:08:04,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:08:04,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:08:04,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:08:04,832 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 19:08:04,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1539459325] [2020-10-28 19:08:04,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:08:04,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:08:04,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897368998] [2020-10-28 19:08:04,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:08:04,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:08:04,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:08:04,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:08:04,835 INFO L87 Difference]: Start difference. First operand 3193 states and 4335 transitions. Second operand 4 states. [2020-10-28 19:08:07,030 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification that was a NOOP. DAG size: 653 [2020-10-28 19:08:19,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:08:19,843 INFO L93 Difference]: Finished difference Result 5821 states and 8182 transitions. [2020-10-28 19:08:19,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:08:19,844 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-10-28 19:08:19,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:08:19,864 INFO L225 Difference]: With dead ends: 5821 [2020-10-28 19:08:19,865 INFO L226 Difference]: Without dead ends: 4352 [2020-10-28 19:08:19,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:08:19,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4352 states. [2020-10-28 19:08:20,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4352 to 4345. [2020-10-28 19:08:20,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4345 states. [2020-10-28 19:08:20,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4345 states to 4345 states and 6001 transitions. [2020-10-28 19:08:20,168 INFO L78 Accepts]: Start accepts. Automaton has 4345 states and 6001 transitions. Word has length 80 [2020-10-28 19:08:20,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:08:20,168 INFO L481 AbstractCegarLoop]: Abstraction has 4345 states and 6001 transitions. [2020-10-28 19:08:20,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:08:20,168 INFO L276 IsEmpty]: Start isEmpty. Operand 4345 states and 6001 transitions. [2020-10-28 19:08:20,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 19:08:20,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:08:20,177 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:08:20,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 19:08:20,177 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:08:20,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:08:20,178 INFO L82 PathProgramCache]: Analyzing trace with hash -134592074, now seen corresponding path program 1 times [2020-10-28 19:08:20,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:08:20,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2107557470] [2020-10-28 19:08:20,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:08:20,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:08:20,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:20,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:20,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:20,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:21,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:21,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:23,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:25,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:08:25,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 19:08:25,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 19:08:25,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 19:08:25,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:08:25,249 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:08:25,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 19:08:25,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:08:25,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 19:08:25,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:08:27,493 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 649 [2020-10-28 19:08:27,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:08:27,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:08:27,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:27,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:08:27,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:08:27,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:08:27,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-28 19:08:27,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:08:27,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:08:27,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:08:27,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:08:27,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:08:27,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:08:27,576 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 19:08:27,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2107557470] [2020-10-28 19:08:27,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:08:27,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 19:08:27,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251930239] [2020-10-28 19:08:27,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 19:08:27,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:08:27,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 19:08:27,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 19:08:27,579 INFO L87 Difference]: Start difference. First operand 4345 states and 6001 transitions. Second operand 8 states. [2020-10-28 19:08:29,870 WARN L193 SmtUtils]: Spent 2.17 s on a formula simplification that was a NOOP. DAG size: 661 [2020-10-28 19:08:44,943 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification that was a NOOP. DAG size: 657 [2020-10-28 19:08:47,151 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 655 [2020-10-28 19:08:51,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:08:51,266 INFO L93 Difference]: Finished difference Result 9136 states and 13187 transitions. [2020-10-28 19:08:51,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 19:08:51,266 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 81 [2020-10-28 19:08:51,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:08:51,304 INFO L225 Difference]: With dead ends: 9136 [2020-10-28 19:08:51,304 INFO L226 Difference]: Without dead ends: 7848 [2020-10-28 19:08:51,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2020-10-28 19:08:51,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7848 states. [2020-10-28 19:08:51,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7848 to 4345. [2020-10-28 19:08:51,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4345 states. [2020-10-28 19:08:51,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4345 states to 4345 states and 5997 transitions. [2020-10-28 19:08:51,658 INFO L78 Accepts]: Start accepts. Automaton has 4345 states and 5997 transitions. Word has length 81 [2020-10-28 19:08:51,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:08:51,658 INFO L481 AbstractCegarLoop]: Abstraction has 4345 states and 5997 transitions. [2020-10-28 19:08:51,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 19:08:51,659 INFO L276 IsEmpty]: Start isEmpty. Operand 4345 states and 5997 transitions. [2020-10-28 19:08:51,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 19:08:51,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:08:51,667 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:08:51,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 19:08:51,667 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:08:51,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:08:51,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1029169353, now seen corresponding path program 1 times [2020-10-28 19:08:51,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:08:51,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281150386] [2020-10-28 19:08:51,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:08:51,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:08:51,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:51,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:51,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:52,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:52,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:56,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:08:56,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 19:08:56,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:08:56,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 19:08:56,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:08:56,746 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:08:56,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 19:08:56,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 19:08:56,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 19:08:56,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:08:58,940 WARN L193 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 649 [2020-10-28 19:08:58,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:08:58,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:08:58,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:59,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:08:59,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:08:59,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:08:59,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-10-28 19:08:59,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:08:59,059 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:08:59,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:08:59,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:08:59,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 19:08:59,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:08:59,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:08:59,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1281150386] [2020-10-28 19:08:59,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:08:59,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:08:59,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094186541] [2020-10-28 19:08:59,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 19:08:59,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:08:59,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 19:08:59,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 19:08:59,104 INFO L87 Difference]: Start difference. First operand 4345 states and 5997 transitions. Second operand 6 states. [2020-10-28 19:09:01,334 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification that was a NOOP. DAG size: 658 [2020-10-28 19:09:10,890 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 656 [2020-10-28 19:09:12,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:09:12,634 INFO L93 Difference]: Finished difference Result 9395 states and 13288 transitions. [2020-10-28 19:09:12,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 19:09:12,635 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-10-28 19:09:12,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:09:12,649 INFO L225 Difference]: With dead ends: 9395 [2020-10-28 19:09:12,649 INFO L226 Difference]: Without dead ends: 5943 [2020-10-28 19:09:12,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 19:09:12,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5943 states. [2020-10-28 19:09:13,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5943 to 5936. [2020-10-28 19:09:13,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5936 states. [2020-10-28 19:09:13,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5936 states to 5936 states and 8422 transitions. [2020-10-28 19:09:13,180 INFO L78 Accepts]: Start accepts. Automaton has 5936 states and 8422 transitions. Word has length 82 [2020-10-28 19:09:13,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:09:13,181 INFO L481 AbstractCegarLoop]: Abstraction has 5936 states and 8422 transitions. [2020-10-28 19:09:13,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 19:09:13,181 INFO L276 IsEmpty]: Start isEmpty. Operand 5936 states and 8422 transitions. [2020-10-28 19:09:13,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 19:09:13,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:09:13,189 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:09:13,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 19:09:13,189 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:09:13,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:09:13,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1136522271, now seen corresponding path program 1 times [2020-10-28 19:09:13,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:09:13,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2105152100] [2020-10-28 19:09:13,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:09:13,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:09:13,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:13,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:13,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:14,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:15,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking...