/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.3.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:51:07,101 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:51:07,104 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:51:07,162 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:51:07,163 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:51:07,169 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:51:07,171 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:51:07,175 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:51:07,178 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:51:07,184 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:51:07,185 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:51:07,186 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:51:07,187 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:51:07,190 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:51:07,191 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:51:07,193 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:51:07,194 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:51:07,197 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:51:07,203 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:51:07,220 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:51:07,222 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:51:07,228 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:51:07,229 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:51:07,230 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:51:07,244 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:51:07,244 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:51:07,245 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:51:07,246 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:51:07,251 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:51:07,252 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:51:07,253 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:51:07,253 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:51:07,257 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:51:07,258 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:51:07,259 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:51:07,259 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:51:07,260 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:51:07,260 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:51:07,260 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:51:07,263 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:51:07,264 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:51:07,265 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 18:51:07,290 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:51:07,291 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:51:07,292 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:51:07,292 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:51:07,293 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:51:07,293 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:51:07,293 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:51:07,293 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:51:07,293 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:51:07,294 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:51:07,294 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:51:07,294 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:51:07,294 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:51:07,294 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:51:07,295 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:51:07,295 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:51:07,295 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:51:07,295 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:51:07,296 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:51:07,296 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:51:07,296 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:51:07,296 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:51:07,296 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:51:07,297 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:51:07,297 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:51:07,297 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:51:07,297 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:51:07,297 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:51:07,297 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:51:07,298 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:51:07,638 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:51:07,687 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:51:07,691 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:51:07,692 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:51:07,693 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:51:07,694 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2020-10-28 18:51:07,779 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/75e971718/a9dd825be36e47eba630e31d1665c293/FLAG4e5313bfb [2020-10-28 18:51:08,560 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:51:08,561 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2020-10-28 18:51:08,588 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/75e971718/a9dd825be36e47eba630e31d1665c293/FLAG4e5313bfb [2020-10-28 18:51:08,678 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/75e971718/a9dd825be36e47eba630e31d1665c293 [2020-10-28 18:51:08,681 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:51:08,688 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:51:08,690 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:51:08,690 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:51:08,694 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:51:08,694 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:51:08" (1/1) ... [2020-10-28 18:51:08,698 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a1892f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:51:08, skipping insertion in model container [2020-10-28 18:51:08,698 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:51:08" (1/1) ... [2020-10-28 18:51:08,707 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:51:08,837 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:51:09,825 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:51:09,839 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:51:10,157 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:51:10,185 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:51:10,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:51:10 WrapperNode [2020-10-28 18:51:10,187 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:51:10,188 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:51:10,188 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:51:10,188 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:51:10,201 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:51:10" (1/1) ... [2020-10-28 18:51:10,203 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:51:10" (1/1) ... [2020-10-28 18:51:10,270 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:51:10" (1/1) ... [2020-10-28 18:51:10,271 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:51:10" (1/1) ... [2020-10-28 18:51:10,333 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:51:10" (1/1) ... [2020-10-28 18:51:10,399 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:51:10" (1/1) ... [2020-10-28 18:51:10,425 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:51:10" (1/1) ... [2020-10-28 18:51:10,447 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:51:10,448 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:51:10,449 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:51:10,449 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:51:10,450 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:51:10" (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 18:51:10,530 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:51:10,530 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:51:10,530 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:51:10,530 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:51:10,531 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:51:10,531 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:51:10,531 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:51:10,531 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:51:10,531 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:51:10,531 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:51:10,531 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:51:10,532 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 18:51:10,532 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:51:10,532 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:51:10,532 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:51:10,532 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:51:10,532 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:51:10,532 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:51:10,533 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:51:10,533 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:51:10,533 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:51:10,533 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:51:10,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:51:10,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:51:10,534 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:51:10,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:51:10,534 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:51:10,534 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:51:13,853 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:51:13,853 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:51:13,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:51:13 BoogieIcfgContainer [2020-10-28 18:51:13,858 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:51:13,860 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:51:13,860 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:51:13,865 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:51:13,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:51:08" (1/3) ... [2020-10-28 18:51:13,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54e4f005 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:51:13, skipping insertion in model container [2020-10-28 18:51:13,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:51:10" (2/3) ... [2020-10-28 18:51:13,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54e4f005 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:51:13, skipping insertion in model container [2020-10-28 18:51:13,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:51:13" (3/3) ... [2020-10-28 18:51:13,868 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2020-10-28 18:51:13,881 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:51:13,891 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:51:13,905 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:51:13,949 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:51:13,949 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:51:13,949 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:51:13,950 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:51:13,950 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:51:13,950 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:51:13,950 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:51:13,950 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:51:13,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1263 states. [2020-10-28 18:51:14,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 18:51:14,022 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:51:14,023 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] [2020-10-28 18:51:14,024 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:51:14,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:51:14,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1096909937, now seen corresponding path program 1 times [2020-10-28 18:51:14,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:51:14,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [455240283] [2020-10-28 18:51:14,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:51:14,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:14,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:14,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:15,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:15,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:16,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:17,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:17,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:18,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:19,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:19,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 18:51:19,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:51:19,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 18:51:19,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:19,440 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:19,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:51:19,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:51:19,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 18:51:19,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 18:51:20,365 WARN L193 SmtUtils]: Spent 651.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:51:20,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:51:20,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:20,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:20,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:20,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:51:20,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:51:20,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 18:51:20,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:20,409 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:20,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:51:20,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:51:20,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:51:20,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:51:20,464 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 18:51:20,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [455240283] [2020-10-28 18:51:20,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:51:20,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:51:20,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937418814] [2020-10-28 18:51:20,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:51:20,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:51:20,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:51:20,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:51:20,495 INFO L87 Difference]: Start difference. First operand 1263 states. Second operand 8 states. [2020-10-28 18:51:21,510 WARN L193 SmtUtils]: Spent 895.00 ms on a formula simplification that was a NOOP. DAG size: 347 [2020-10-28 18:51:30,028 WARN L193 SmtUtils]: Spent 942.00 ms on a formula simplification that was a NOOP. DAG size: 349 [2020-10-28 18:51:31,939 WARN L193 SmtUtils]: Spent 851.00 ms on a formula simplification that was a NOOP. DAG size: 350 [2020-10-28 18:51:33,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:51:33,212 INFO L93 Difference]: Finished difference Result 2375 states and 4088 transitions. [2020-10-28 18:51:33,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 18:51:33,216 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2020-10-28 18:51:33,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:51:33,271 INFO L225 Difference]: With dead ends: 2375 [2020-10-28 18:51:33,271 INFO L226 Difference]: Without dead ends: 1795 [2020-10-28 18:51:33,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-28 18:51:33,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1795 states. [2020-10-28 18:51:33,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1795 to 1426. [2020-10-28 18:51:33,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1426 states. [2020-10-28 18:51:33,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 1954 transitions. [2020-10-28 18:51:33,496 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 1954 transitions. Word has length 56 [2020-10-28 18:51:33,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:51:33,498 INFO L481 AbstractCegarLoop]: Abstraction has 1426 states and 1954 transitions. [2020-10-28 18:51:33,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:51:33,498 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 1954 transitions. [2020-10-28 18:51:33,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 18:51:33,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:51:33,507 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] [2020-10-28 18:51:33,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:51:33,508 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:51:33,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:51:33,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1066679324, now seen corresponding path program 1 times [2020-10-28 18:51:33,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:51:33,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [648484959] [2020-10-28 18:51:33,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:51:33,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:33,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:33,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:33,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:33,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:34,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:34,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:34,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:34,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:36,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:38,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:38,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 18:51:38,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 18:51:38,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 18:51:38,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:38,591 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:38,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:51:38,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 18:51:38,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 18:51:38,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:51:39,430 WARN L193 SmtUtils]: Spent 762.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:51:39,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:51:39,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:39,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:39,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:39,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:51:39,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:51:39,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 18:51:39,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:39,463 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:39,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:51:39,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:51:39,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:51:39,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:51:39,486 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 18:51:39,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [648484959] [2020-10-28 18:51:39,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:51:39,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:51:39,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092061939] [2020-10-28 18:51:39,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:51:39,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:51:39,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:51:39,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:51:39,490 INFO L87 Difference]: Start difference. First operand 1426 states and 1954 transitions. Second operand 4 states. [2020-10-28 18:51:40,365 WARN L193 SmtUtils]: Spent 813.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2020-10-28 18:51:44,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:51:44,815 INFO L93 Difference]: Finished difference Result 2182 states and 3082 transitions. [2020-10-28 18:51:44,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:51:44,815 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-10-28 18:51:44,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:51:44,825 INFO L225 Difference]: With dead ends: 2182 [2020-10-28 18:51:44,825 INFO L226 Difference]: Without dead ends: 1519 [2020-10-28 18:51:44,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:51:44,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1519 states. [2020-10-28 18:51:44,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1519 to 1513. [2020-10-28 18:51:44,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1513 states. [2020-10-28 18:51:44,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1513 states to 1513 states and 2108 transitions. [2020-10-28 18:51:44,905 INFO L78 Accepts]: Start accepts. Automaton has 1513 states and 2108 transitions. Word has length 57 [2020-10-28 18:51:44,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:51:44,906 INFO L481 AbstractCegarLoop]: Abstraction has 1513 states and 2108 transitions. [2020-10-28 18:51:44,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:51:44,906 INFO L276 IsEmpty]: Start isEmpty. Operand 1513 states and 2108 transitions. [2020-10-28 18:51:44,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 18:51:44,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:51:44,910 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] [2020-10-28 18:51:44,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:51:44,910 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:51:44,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:51:44,911 INFO L82 PathProgramCache]: Analyzing trace with hash -13712135, now seen corresponding path program 1 times [2020-10-28 18:51:44,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:51:44,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1590060239] [2020-10-28 18:51:44,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:51:44,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:44,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:45,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:45,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:45,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:45,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:46,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:46,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:47,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:48,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:48,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:49,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:49,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:49,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 18:51:49,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 18:51:49,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 18:51:49,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:49,969 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:49,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:51:49,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:51:49,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 18:51:49,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:51:50,838 WARN L193 SmtUtils]: Spent 768.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:51:50,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:51:50,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:50,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:50,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:50,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:51:50,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:51:50,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-28 18:51:50,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:50,918 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:50,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:51:50,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:51:50,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:51:50,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:51:50,946 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 18:51:50,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1590060239] [2020-10-28 18:51:50,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:51:50,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:51:50,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835101081] [2020-10-28 18:51:50,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:51:50,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:51:50,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:51:50,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:51:50,951 INFO L87 Difference]: Start difference. First operand 1513 states and 2108 transitions. Second operand 6 states. [2020-10-28 18:51:51,938 WARN L193 SmtUtils]: Spent 924.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-28 18:51:56,649 WARN L193 SmtUtils]: Spent 816.00 ms on a formula simplification that was a NOOP. DAG size: 345 [2020-10-28 18:51:57,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:51:57,502 INFO L93 Difference]: Finished difference Result 2548 states and 3664 transitions. [2020-10-28 18:51:57,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:51:57,504 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-10-28 18:51:57,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:51:57,519 INFO L225 Difference]: With dead ends: 2548 [2020-10-28 18:51:57,519 INFO L226 Difference]: Without dead ends: 1809 [2020-10-28 18:51:57,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-28 18:51:57,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1809 states. [2020-10-28 18:51:57,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1809 to 1802. [2020-10-28 18:51:57,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1802 states. [2020-10-28 18:51:57,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1802 states to 1802 states and 2571 transitions. [2020-10-28 18:51:57,606 INFO L78 Accepts]: Start accepts. Automaton has 1802 states and 2571 transitions. Word has length 57 [2020-10-28 18:51:57,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:51:57,608 INFO L481 AbstractCegarLoop]: Abstraction has 1802 states and 2571 transitions. [2020-10-28 18:51:57,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:51:57,610 INFO L276 IsEmpty]: Start isEmpty. Operand 1802 states and 2571 transitions. [2020-10-28 18:51:57,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 18:51:57,613 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:51:57,613 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] [2020-10-28 18:51:57,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:51:57,613 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:51:57,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:51:57,614 INFO L82 PathProgramCache]: Analyzing trace with hash 7588088, now seen corresponding path program 1 times [2020-10-28 18:51:57,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:51:57,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059253882] [2020-10-28 18:51:57,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:51:57,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:57,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:57,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:58,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:58,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:58,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:58,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:59,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:00,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:00,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:00,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:02,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:02,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:02,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:02,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 18:52:02,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:52:02,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5100 [2020-10-28 18:52:02,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:02,764 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:02,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:52:02,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:52:02,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 18:52:02,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:52:03,832 WARN L193 SmtUtils]: Spent 754.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:52:03,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:52:03,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:03,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:03,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:03,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:52:03,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:52:03,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 18:52:03,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:03,868 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:03,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:52:03,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:52:03,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:52:03,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:03,901 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 18:52:03,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059253882] [2020-10-28 18:52:03,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:52:03,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:52:03,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751851966] [2020-10-28 18:52:03,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:52:03,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:52:03,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:52:03,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:52:03,903 INFO L87 Difference]: Start difference. First operand 1802 states and 2571 transitions. Second operand 8 states. [2020-10-28 18:52:04,809 WARN L193 SmtUtils]: Spent 828.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-28 18:52:09,260 WARN L193 SmtUtils]: Spent 854.00 ms on a formula simplification that was a NOOP. DAG size: 355 [2020-10-28 18:52:10,746 WARN L193 SmtUtils]: Spent 816.00 ms on a formula simplification that was a NOOP. DAG size: 353 [2020-10-28 18:52:11,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:52:11,869 INFO L93 Difference]: Finished difference Result 3754 states and 5647 transitions. [2020-10-28 18:52:11,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 18:52:11,870 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-10-28 18:52:11,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:52:11,886 INFO L225 Difference]: With dead ends: 3754 [2020-10-28 18:52:11,886 INFO L226 Difference]: Without dead ends: 3110 [2020-10-28 18:52:11,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-28 18:52:11,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3110 states. [2020-10-28 18:52:12,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3110 to 1790. [2020-10-28 18:52:12,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1790 states. [2020-10-28 18:52:12,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1790 states to 1790 states and 2554 transitions. [2020-10-28 18:52:12,033 INFO L78 Accepts]: Start accepts. Automaton has 1790 states and 2554 transitions. Word has length 57 [2020-10-28 18:52:12,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:52:12,033 INFO L481 AbstractCegarLoop]: Abstraction has 1790 states and 2554 transitions. [2020-10-28 18:52:12,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:52:12,033 INFO L276 IsEmpty]: Start isEmpty. Operand 1790 states and 2554 transitions. [2020-10-28 18:52:12,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 18:52:12,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:52:12,037 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] [2020-10-28 18:52:12,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 18:52:12,037 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:52:12,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:52:12,037 INFO L82 PathProgramCache]: Analyzing trace with hash 129982199, now seen corresponding path program 1 times [2020-10-28 18:52:12,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:52:12,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1363503589] [2020-10-28 18:52:12,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:52:12,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:12,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:12,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:12,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:12,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:12,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:12,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:13,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:13,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:14,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:14,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:14,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:15,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:16,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:17,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:17,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:17,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 18:52:17,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 18:52:17,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 18:52:17,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:17,087 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:17,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 18:52:17,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:52:17,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 18:52:17,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:18,042 WARN L193 SmtUtils]: Spent 775.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:52:18,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:52:18,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:18,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:18,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:18,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:52:18,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:52:18,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 18:52:18,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:18,081 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:18,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:52:18,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:52:18,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:52:18,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:18,108 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 18:52:18,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1363503589] [2020-10-28 18:52:18,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:52:18,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 18:52:18,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256659550] [2020-10-28 18:52:18,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 18:52:18,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:52:18,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 18:52:18,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:52:18,111 INFO L87 Difference]: Start difference. First operand 1790 states and 2554 transitions. Second operand 9 states. [2020-10-28 18:52:19,012 WARN L193 SmtUtils]: Spent 821.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2020-10-28 18:52:23,515 WARN L193 SmtUtils]: Spent 837.00 ms on a formula simplification that was a NOOP. DAG size: 350 [2020-10-28 18:52:25,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:52:25,184 INFO L93 Difference]: Finished difference Result 2957 states and 4402 transitions. [2020-10-28 18:52:25,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 18:52:25,186 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-10-28 18:52:25,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:52:25,200 INFO L225 Difference]: With dead ends: 2957 [2020-10-28 18:52:25,200 INFO L226 Difference]: Without dead ends: 2952 [2020-10-28 18:52:25,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-28 18:52:25,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2952 states. [2020-10-28 18:52:25,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2952 to 1787. [2020-10-28 18:52:25,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1787 states. [2020-10-28 18:52:25,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1787 states to 1787 states and 2549 transitions. [2020-10-28 18:52:25,344 INFO L78 Accepts]: Start accepts. Automaton has 1787 states and 2549 transitions. Word has length 58 [2020-10-28 18:52:25,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:52:25,344 INFO L481 AbstractCegarLoop]: Abstraction has 1787 states and 2549 transitions. [2020-10-28 18:52:25,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 18:52:25,345 INFO L276 IsEmpty]: Start isEmpty. Operand 1787 states and 2549 transitions. [2020-10-28 18:52:25,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 18:52:25,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:52:25,348 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] [2020-10-28 18:52:25,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 18:52:25,348 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:52:25,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:52:25,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1253215674, now seen corresponding path program 1 times [2020-10-28 18:52:25,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:52:25,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1050115960] [2020-10-28 18:52:25,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:52:25,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:25,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:25,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:25,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:25,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:26,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:26,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:26,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:27,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:27,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:27,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:27,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:27,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:28,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:28,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:28,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:28,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:29,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:30,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:30,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 18:52:30,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-28 18:52:30,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 18:52:30,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:30,399 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:30,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 18:52:30,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:52:30,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 18:52:30,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:31,305 WARN L193 SmtUtils]: Spent 752.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:52:31,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:52:31,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:31,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:31,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:31,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:52:31,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:52:31,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 18:52:31,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:31,342 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:31,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:52:31,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:52:31,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:52:31,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:31,383 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 18:52:31,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1050115960] [2020-10-28 18:52:31,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:52:31,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 18:52:31,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584525601] [2020-10-28 18:52:31,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 18:52:31,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:52:31,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 18:52:31,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-28 18:52:31,385 INFO L87 Difference]: Start difference. First operand 1787 states and 2549 transitions. Second operand 10 states. [2020-10-28 18:52:32,362 WARN L193 SmtUtils]: Spent 883.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 18:52:36,650 WARN L193 SmtUtils]: Spent 849.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2020-10-28 18:52:39,159 WARN L193 SmtUtils]: Spent 813.00 ms on a formula simplification that was a NOOP. DAG size: 344 [2020-10-28 18:52:40,281 WARN L193 SmtUtils]: Spent 812.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-28 18:52:40,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:52:40,943 INFO L93 Difference]: Finished difference Result 5008 states and 7537 transitions. [2020-10-28 18:52:40,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 18:52:40,944 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 58 [2020-10-28 18:52:40,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:52:40,963 INFO L225 Difference]: With dead ends: 5008 [2020-10-28 18:52:40,963 INFO L226 Difference]: Without dead ends: 4115 [2020-10-28 18:52:40,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-28 18:52:40,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4115 states. [2020-10-28 18:52:41,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4115 to 1957. [2020-10-28 18:52:41,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1957 states. [2020-10-28 18:52:41,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1957 states to 1957 states and 2845 transitions. [2020-10-28 18:52:41,172 INFO L78 Accepts]: Start accepts. Automaton has 1957 states and 2845 transitions. Word has length 58 [2020-10-28 18:52:41,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:52:41,172 INFO L481 AbstractCegarLoop]: Abstraction has 1957 states and 2845 transitions. [2020-10-28 18:52:41,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 18:52:41,172 INFO L276 IsEmpty]: Start isEmpty. Operand 1957 states and 2845 transitions. [2020-10-28 18:52:41,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 18:52:41,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:52:41,176 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] [2020-10-28 18:52:41,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 18:52:41,176 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:52:41,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:52:41,177 INFO L82 PathProgramCache]: Analyzing trace with hash -48630988, now seen corresponding path program 1 times [2020-10-28 18:52:41,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:52:41,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090966195] [2020-10-28 18:52:41,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:52:41,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:41,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:41,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:41,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:41,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:41,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:41,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:43,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:43,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:43,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:43,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:44,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:44,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:44,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:45,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:45,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:46,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:46,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 18:52:46,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 18:52:46,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 18:52:46,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:46,228 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:46,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 18:52:46,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:52:46,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 18:52:46,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:47,256 WARN L193 SmtUtils]: Spent 782.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:52:47,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:52:47,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:47,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:47,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:47,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:52:47,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:52:47,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 18:52:47,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:47,281 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:47,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:52:47,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:52:47,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:52:47,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:47,304 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 18:52:47,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2090966195] [2020-10-28 18:52:47,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:52:47,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 18:52:47,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871792132] [2020-10-28 18:52:47,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 18:52:47,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:52:47,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 18:52:47,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:52:47,306 INFO L87 Difference]: Start difference. First operand 1957 states and 2845 transitions. Second operand 9 states. [2020-10-28 18:52:48,228 WARN L193 SmtUtils]: Spent 841.00 ms on a formula simplification that was a NOOP. DAG size: 354 [2020-10-28 18:52:52,179 WARN L193 SmtUtils]: Spent 846.00 ms on a formula simplification that was a NOOP. DAG size: 351 [2020-10-28 18:52:54,292 WARN L193 SmtUtils]: Spent 823.00 ms on a formula simplification that was a NOOP. DAG size: 349 [2020-10-28 18:52:54,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:52:54,911 INFO L93 Difference]: Finished difference Result 4138 states and 6274 transitions. [2020-10-28 18:52:54,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 18:52:54,911 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-10-28 18:52:54,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:52:54,927 INFO L225 Difference]: With dead ends: 4138 [2020-10-28 18:52:54,927 INFO L226 Difference]: Without dead ends: 4133 [2020-10-28 18:52:54,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2020-10-28 18:52:54,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4133 states. [2020-10-28 18:52:55,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4133 to 1954. [2020-10-28 18:52:55,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1954 states. [2020-10-28 18:52:55,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1954 states to 1954 states and 2841 transitions. [2020-10-28 18:52:55,142 INFO L78 Accepts]: Start accepts. Automaton has 1954 states and 2841 transitions. Word has length 58 [2020-10-28 18:52:55,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:52:55,143 INFO L481 AbstractCegarLoop]: Abstraction has 1954 states and 2841 transitions. [2020-10-28 18:52:55,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 18:52:55,143 INFO L276 IsEmpty]: Start isEmpty. Operand 1954 states and 2841 transitions. [2020-10-28 18:52:55,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 18:52:55,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:52:55,146 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] [2020-10-28 18:52:55,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 18:52:55,146 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:52:55,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:52:55,146 INFO L82 PathProgramCache]: Analyzing trace with hash -2003024578, now seen corresponding path program 1 times [2020-10-28 18:52:55,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:52:55,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1668366504] [2020-10-28 18:52:55,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:52:55,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:55,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:55,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:55,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:55,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:56,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:58,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:58,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 18:52:58,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:52:58,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3422 [2020-10-28 18:52:58,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:58,601 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:58,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:52:58,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-28 18:52:58,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 18:52:58,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:59,430 WARN L193 SmtUtils]: Spent 780.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:52:59,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:52:59,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:59,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:59,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:59,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:52:59,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:52:59,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 18:52:59,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:59,454 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:59,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:52:59,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:52:59,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:52:59,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:59,470 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 18:52:59,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1668366504] [2020-10-28 18:52:59,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:52:59,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:52:59,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894794295] [2020-10-28 18:52:59,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:52:59,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:52:59,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:52:59,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:52:59,472 INFO L87 Difference]: Start difference. First operand 1954 states and 2841 transitions. Second operand 4 states. [2020-10-28 18:53:03,443 WARN L193 SmtUtils]: Spent 841.00 ms on a formula simplification that was a NOOP. DAG size: 345 [2020-10-28 18:53:04,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:53:04,109 INFO L93 Difference]: Finished difference Result 3540 states and 5357 transitions. [2020-10-28 18:53:04,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:53:04,110 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2020-10-28 18:53:04,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:53:04,121 INFO L225 Difference]: With dead ends: 3540 [2020-10-28 18:53:04,122 INFO L226 Difference]: Without dead ends: 2568 [2020-10-28 18:53:04,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:53:04,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2568 states. [2020-10-28 18:53:04,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2568 to 1953. [2020-10-28 18:53:04,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1953 states. [2020-10-28 18:53:04,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 2861 transitions. [2020-10-28 18:53:04,336 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 2861 transitions. Word has length 59 [2020-10-28 18:53:04,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:53:04,336 INFO L481 AbstractCegarLoop]: Abstraction has 1953 states and 2861 transitions. [2020-10-28 18:53:04,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:53:04,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 2861 transitions. [2020-10-28 18:53:04,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 18:53:04,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:53:04,339 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] [2020-10-28 18:53:04,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 18:53:04,339 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:53:04,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:53:04,340 INFO L82 PathProgramCache]: Analyzing trace with hash 493972963, now seen corresponding path program 1 times [2020-10-28 18:53:04,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:53:04,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1877429581] [2020-10-28 18:53:04,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:53:04,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:53:04,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:04,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:04,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:04,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:05,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:05,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:05,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:05,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:07,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:53:07,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 18:53:07,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:53:07,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3423 [2020-10-28 18:53:07,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:53:07,801 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:53:07,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 18:53:07,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:53:07,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 18:53:07,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:53:08,699 WARN L193 SmtUtils]: Spent 783.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:53:08,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:53:08,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:53:08,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:08,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:53:08,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:53:08,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:53:08,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 18:53:08,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:53:08,731 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:53:08,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:53:08,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:53:08,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:53:08,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:53:08,753 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 18:53:08,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1877429581] [2020-10-28 18:53:08,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:53:08,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 18:53:08,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709673799] [2020-10-28 18:53:08,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 18:53:08,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:53:08,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 18:53:08,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:53:08,755 INFO L87 Difference]: Start difference. First operand 1953 states and 2861 transitions. Second operand 9 states. [2020-10-28 18:53:09,688 WARN L193 SmtUtils]: Spent 860.00 ms on a formula simplification that was a NOOP. DAG size: 347 [2020-10-28 18:53:14,771 WARN L193 SmtUtils]: Spent 844.00 ms on a formula simplification that was a NOOP. DAG size: 349 [2020-10-28 18:53:15,891 WARN L193 SmtUtils]: Spent 889.00 ms on a formula simplification that was a NOOP. DAG size: 351 [2020-10-28 18:53:16,801 WARN L193 SmtUtils]: Spent 825.00 ms on a formula simplification that was a NOOP. DAG size: 350 [2020-10-28 18:53:18,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:53:18,155 INFO L93 Difference]: Finished difference Result 8825 states and 13367 transitions. [2020-10-28 18:53:18,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 18:53:18,156 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2020-10-28 18:53:18,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:53:18,184 INFO L225 Difference]: With dead ends: 8825 [2020-10-28 18:53:18,185 INFO L226 Difference]: Without dead ends: 6962 [2020-10-28 18:53:18,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2020-10-28 18:53:18,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6962 states. [2020-10-28 18:53:18,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6962 to 4066. [2020-10-28 18:53:18,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4066 states. [2020-10-28 18:53:18,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4066 states to 4066 states and 6122 transitions. [2020-10-28 18:53:18,702 INFO L78 Accepts]: Start accepts. Automaton has 4066 states and 6122 transitions. Word has length 61 [2020-10-28 18:53:18,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:53:18,702 INFO L481 AbstractCegarLoop]: Abstraction has 4066 states and 6122 transitions. [2020-10-28 18:53:18,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 18:53:18,702 INFO L276 IsEmpty]: Start isEmpty. Operand 4066 states and 6122 transitions. [2020-10-28 18:53:18,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 18:53:18,706 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:53:18,707 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] [2020-10-28 18:53:18,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 18:53:18,707 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:53:18,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:53:18,707 INFO L82 PathProgramCache]: Analyzing trace with hash -659073175, now seen corresponding path program 1 times [2020-10-28 18:53:18,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:53:18,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701635320] [2020-10-28 18:53:18,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:53:18,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:53:18,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:18,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:18,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:19,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:19,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:19,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:19,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:22,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:53:22,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 18:53:22,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:53:22,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4076 [2020-10-28 18:53:22,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:53:22,817 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:53:22,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:53:22,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 18:53:22,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 18:53:22,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:53:23,679 WARN L193 SmtUtils]: Spent 816.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:53:23,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:53:23,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:53:23,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:23,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:53:23,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:53:23,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:53:23,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 18:53:23,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:53:23,697 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:53:23,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:53:23,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:53:23,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:53:23,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:53:23,714 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 18:53:23,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [701635320] [2020-10-28 18:53:23,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:53:23,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:53:23,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630632988] [2020-10-28 18:53:23,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:53:23,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:53:23,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:53:23,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:53:23,716 INFO L87 Difference]: Start difference. First operand 4066 states and 6122 transitions. Second operand 4 states. [2020-10-28 18:53:24,561 WARN L193 SmtUtils]: Spent 797.00 ms on a formula simplification that was a NOOP. DAG size: 343 [2020-10-28 18:53:28,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:53:28,186 INFO L93 Difference]: Finished difference Result 10109 states and 15583 transitions. [2020-10-28 18:53:28,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:53:28,187 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-28 18:53:28,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:53:28,210 INFO L225 Difference]: With dead ends: 10109 [2020-10-28 18:53:28,210 INFO L226 Difference]: Without dead ends: 7031 [2020-10-28 18:53:28,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:53:28,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7031 states. [2020-10-28 18:53:29,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7031 to 7028. [2020-10-28 18:53:29,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7028 states. [2020-10-28 18:53:29,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7028 states to 7028 states and 10668 transitions. [2020-10-28 18:53:29,122 INFO L78 Accepts]: Start accepts. Automaton has 7028 states and 10668 transitions. Word has length 66 [2020-10-28 18:53:29,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:53:29,122 INFO L481 AbstractCegarLoop]: Abstraction has 7028 states and 10668 transitions. [2020-10-28 18:53:29,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:53:29,122 INFO L276 IsEmpty]: Start isEmpty. Operand 7028 states and 10668 transitions. [2020-10-28 18:53:29,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 18:53:29,127 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:53:29,127 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:53:29,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 18:53:29,127 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:53:29,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:53:29,128 INFO L82 PathProgramCache]: Analyzing trace with hash -353404095, now seen corresponding path program 1 times [2020-10-28 18:53:29,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:53:29,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1769935833] [2020-10-28 18:53:29,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:53:29,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:53:29,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:29,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:29,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:29,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:29,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:31,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:53:31,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 18:53:31,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:53:31,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1973 [2020-10-28 18:53:31,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:53:31,137 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:53:31,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:53:31,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-28 18:53:31,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 18:53:31,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:53:32,009 WARN L193 SmtUtils]: Spent 781.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:53:32,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:53:32,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:53:32,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:32,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:53:32,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:53:32,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:53:32,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 18:53:32,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:53:32,041 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:53:32,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:53:32,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:53:32,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:53:32,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:53:32,062 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 18:53:32,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1769935833] [2020-10-28 18:53:32,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:53:32,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:53:32,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265501340] [2020-10-28 18:53:32,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:53:32,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:53:32,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:53:32,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:53:32,064 INFO L87 Difference]: Start difference. First operand 7028 states and 10668 transitions. Second operand 4 states. [2020-10-28 18:53:32,964 WARN L193 SmtUtils]: Spent 837.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2020-10-28 18:53:37,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:53:37,591 INFO L93 Difference]: Finished difference Result 17900 states and 27541 transitions. [2020-10-28 18:53:37,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:53:37,591 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-28 18:53:37,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:53:37,617 INFO L225 Difference]: With dead ends: 17900 [2020-10-28 18:53:37,617 INFO L226 Difference]: Without dead ends: 11873 [2020-10-28 18:53:37,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:53:37,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11873 states. [2020-10-28 18:53:38,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11873 to 11294. [2020-10-28 18:53:38,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11294 states. [2020-10-28 18:53:38,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11294 states to 11294 states and 17220 transitions. [2020-10-28 18:53:38,840 INFO L78 Accepts]: Start accepts. Automaton has 11294 states and 17220 transitions. Word has length 67 [2020-10-28 18:53:38,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:53:38,840 INFO L481 AbstractCegarLoop]: Abstraction has 11294 states and 17220 transitions. [2020-10-28 18:53:38,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:53:38,840 INFO L276 IsEmpty]: Start isEmpty. Operand 11294 states and 17220 transitions. [2020-10-28 18:53:38,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 18:53:38,844 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:53:38,844 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:53:38,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 18:53:38,844 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:53:38,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:53:38,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1069181087, now seen corresponding path program 1 times [2020-10-28 18:53:38,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:53:38,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [823790936] [2020-10-28 18:53:38,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:53:38,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:53:38,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:39,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:39,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:39,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:40,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:53:40,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 18:53:40,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 18:53:40,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1224 [2020-10-28 18:53:40,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:53:40,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:53:40,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:53:40,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 18:53:40,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 18:53:40,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:53:40,944 WARN L193 SmtUtils]: Spent 783.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:53:40,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:53:40,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:53:40,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:41,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:53:41,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:53:41,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:53:41,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-28 18:53:41,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:53:41,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:53:41,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:53:41,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:53:41,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:53:41,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:53:41,047 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 18:53:41,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [823790936] [2020-10-28 18:53:41,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:53:41,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:53:41,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409264359] [2020-10-28 18:53:41,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:53:41,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:53:41,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:53:41,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:53:41,049 INFO L87 Difference]: Start difference. First operand 11294 states and 17220 transitions. Second operand 4 states. [2020-10-28 18:53:41,909 WARN L193 SmtUtils]: Spent 811.00 ms on a formula simplification that was a NOOP. DAG size: 344 [2020-10-28 18:53:46,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:53:46,987 INFO L93 Difference]: Finished difference Result 28760 states and 44176 transitions. [2020-10-28 18:53:46,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:53:46,988 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-28 18:53:46,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:53:47,031 INFO L225 Difference]: With dead ends: 28760 [2020-10-28 18:53:47,031 INFO L226 Difference]: Without dead ends: 18436 [2020-10-28 18:53:47,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:53:47,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18436 states. [2020-10-28 18:53:49,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18436 to 18433. [2020-10-28 18:53:49,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18433 states. [2020-10-28 18:53:49,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18433 states to 18433 states and 27949 transitions. [2020-10-28 18:53:49,321 INFO L78 Accepts]: Start accepts. Automaton has 18433 states and 27949 transitions. Word has length 68 [2020-10-28 18:53:49,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:53:49,321 INFO L481 AbstractCegarLoop]: Abstraction has 18433 states and 27949 transitions. [2020-10-28 18:53:49,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:53:49,321 INFO L276 IsEmpty]: Start isEmpty. Operand 18433 states and 27949 transitions. [2020-10-28 18:53:49,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 18:53:49,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:53:49,324 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:53:49,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 18:53:49,324 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:53:49,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:53:49,325 INFO L82 PathProgramCache]: Analyzing trace with hash 674491830, now seen corresponding path program 1 times [2020-10-28 18:53:49,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:53:49,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1781835333] [2020-10-28 18:53:49,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:53:49,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:53:49,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:49,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:49,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:49,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:53:49,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 18:53:49,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 18:53:49,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 557 [2020-10-28 18:53:49,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:53:49,916 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:53:49,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:53:49,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:53:49,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 18:53:49,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:53:50,794 WARN L193 SmtUtils]: Spent 782.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:53:50,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:53:50,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:53:50,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:50,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:53:50,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:53:50,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:53:50,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-28 18:53:50,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:53:50,850 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:53:50,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:53:50,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:53:50,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:53:50,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:53:50,875 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 18:53:50,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1781835333] [2020-10-28 18:53:50,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:53:50,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:53:50,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906374057] [2020-10-28 18:53:50,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:53:50,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:53:50,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:53:50,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:53:50,878 INFO L87 Difference]: Start difference. First operand 18433 states and 27949 transitions. Second operand 6 states. [2020-10-28 18:53:51,883 WARN L193 SmtUtils]: Spent 940.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2020-10-28 18:53:55,847 WARN L193 SmtUtils]: Spent 874.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-28 18:53:59,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:53:59,105 INFO L93 Difference]: Finished difference Result 47525 states and 72264 transitions. [2020-10-28 18:53:59,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:53:59,105 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-10-28 18:53:59,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:53:59,161 INFO L225 Difference]: With dead ends: 47525 [2020-10-28 18:53:59,161 INFO L226 Difference]: Without dead ends: 29748 [2020-10-28 18:53:59,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-28 18:53:59,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29748 states. [2020-10-28 18:54:02,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29748 to 29745. [2020-10-28 18:54:02,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29745 states. [2020-10-28 18:54:02,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29745 states to 29745 states and 44511 transitions. [2020-10-28 18:54:02,796 INFO L78 Accepts]: Start accepts. Automaton has 29745 states and 44511 transitions. Word has length 69 [2020-10-28 18:54:02,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:54:02,796 INFO L481 AbstractCegarLoop]: Abstraction has 29745 states and 44511 transitions. [2020-10-28 18:54:02,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:54:02,797 INFO L276 IsEmpty]: Start isEmpty. Operand 29745 states and 44511 transitions. [2020-10-28 18:54:02,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 18:54:02,799 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:54:02,800 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] [2020-10-28 18:54:02,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 18:54:02,800 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:54:02,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:54:02,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1592818096, now seen corresponding path program 1 times [2020-10-28 18:54:02,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:54:02,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1697899490] [2020-10-28 18:54:02,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:54:02,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:54:02,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:02,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:03,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:03,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:03,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:03,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:03,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:03,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:03,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:04,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:54:04,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 18:54:04,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 18:54:04,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1509 [2020-10-28 18:54:04,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:54:04,343 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:54:04,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:54:04,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 18:54:04,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 18:54:04,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:54:05,211 WARN L193 SmtUtils]: Spent 803.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:54:05,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:54:05,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:54:05,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:05,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:54:05,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:54:05,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:54:05,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 18:54:05,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:54:05,232 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:54:05,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:54:05,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:54:05,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:54:05,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:54:05,260 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 18:54:05,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1697899490] [2020-10-28 18:54:05,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:54:05,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:54:05,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840610710] [2020-10-28 18:54:05,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:54:05,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:54:05,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:54:05,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:54:05,262 INFO L87 Difference]: Start difference. First operand 29745 states and 44511 transitions. Second operand 6 states. [2020-10-28 18:54:08,854 WARN L193 SmtUtils]: Spent 817.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-28 18:54:09,750 WARN L193 SmtUtils]: Spent 847.00 ms on a formula simplification that was a NOOP. DAG size: 349 [2020-10-28 18:54:10,680 WARN L193 SmtUtils]: Spent 855.00 ms on a formula simplification that was a NOOP. DAG size: 351 [2020-10-28 18:54:16,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:54:16,064 INFO L93 Difference]: Finished difference Result 81012 states and 121547 transitions. [2020-10-28 18:54:16,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 18:54:16,065 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-10-28 18:54:16,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:54:16,159 INFO L225 Difference]: With dead ends: 81012 [2020-10-28 18:54:16,159 INFO L226 Difference]: Without dead ends: 52169 [2020-10-28 18:54:16,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:54:16,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52169 states. [2020-10-28 18:54:21,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52169 to 39083. [2020-10-28 18:54:21,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39083 states. [2020-10-28 18:54:21,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39083 states to 39083 states and 58607 transitions. [2020-10-28 18:54:21,309 INFO L78 Accepts]: Start accepts. Automaton has 39083 states and 58607 transitions. Word has length 70 [2020-10-28 18:54:21,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:54:21,310 INFO L481 AbstractCegarLoop]: Abstraction has 39083 states and 58607 transitions. [2020-10-28 18:54:21,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:54:21,310 INFO L276 IsEmpty]: Start isEmpty. Operand 39083 states and 58607 transitions. [2020-10-28 18:54:21,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 18:54:21,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:54:21,313 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:54:21,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 18:54:21,313 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:54:21,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:54:21,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1893439480, now seen corresponding path program 1 times [2020-10-28 18:54:21,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:54:21,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637417640] [2020-10-28 18:54:21,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:54:21,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:54:21,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:21,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:21,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:21,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:21,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:21,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:22,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:54:22,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 18:54:22,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 18:54:22,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1097 [2020-10-28 18:54:22,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:54:22,448 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:54:22,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:54:22,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-28 18:54:22,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 18:54:22,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:54:23,272 WARN L193 SmtUtils]: Spent 788.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:54:23,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:54:23,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:54:23,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:23,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:54:23,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:54:23,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:54:23,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 18:54:23,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:54:23,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:54:23,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:54:23,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:54:23,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:54:23,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:54:23,309 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 18:54:23,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1637417640] [2020-10-28 18:54:23,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:54:23,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:54:23,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882572286] [2020-10-28 18:54:23,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:54:23,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:54:23,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:54:23,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:54:23,311 INFO L87 Difference]: Start difference. First operand 39083 states and 58607 transitions. Second operand 4 states. [2020-10-28 18:54:24,198 WARN L193 SmtUtils]: Spent 835.00 ms on a formula simplification that was a NOOP. DAG size: 344 [2020-10-28 18:54:31,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:54:31,807 INFO L93 Difference]: Finished difference Result 49781 states and 74355 transitions. [2020-10-28 18:54:31,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:54:31,808 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-10-28 18:54:31,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:54:31,856 INFO L225 Difference]: With dead ends: 49781 [2020-10-28 18:54:31,856 INFO L226 Difference]: Without dead ends: 37085 [2020-10-28 18:54:31,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:54:31,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37085 states. [2020-10-28 18:54:35,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37085 to 27059. [2020-10-28 18:54:35,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27059 states. [2020-10-28 18:54:35,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27059 states to 27059 states and 39485 transitions. [2020-10-28 18:54:35,211 INFO L78 Accepts]: Start accepts. Automaton has 27059 states and 39485 transitions. Word has length 72 [2020-10-28 18:54:35,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:54:35,211 INFO L481 AbstractCegarLoop]: Abstraction has 27059 states and 39485 transitions. [2020-10-28 18:54:35,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:54:35,211 INFO L276 IsEmpty]: Start isEmpty. Operand 27059 states and 39485 transitions. [2020-10-28 18:54:35,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 18:54:35,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:54:35,213 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:54:35,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 18:54:35,213 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:54:35,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:54:35,214 INFO L82 PathProgramCache]: Analyzing trace with hash 896070429, now seen corresponding path program 1 times [2020-10-28 18:54:35,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:54:35,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1233811433] [2020-10-28 18:54:35,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:54:35,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:54:35,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:35,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:35,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:35,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:35,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:35,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:35,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:36,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:37,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:40,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:54:40,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 18:54:40,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 18:54:40,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 18:54:40,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:54:40,242 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:54:40,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:54:40,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-28 18:54:40,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 18:54:40,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:54:41,069 WARN L193 SmtUtils]: Spent 789.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:54:41,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:54:41,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:54:41,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:41,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:54:41,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:54:41,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:54:41,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 18:54:41,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:54:41,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:54:41,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:54:41,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:54:41,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:54:41,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:54:41,107 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 18:54:41,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1233811433] [2020-10-28 18:54:41,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:54:41,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:54:41,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779629252] [2020-10-28 18:54:41,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:54:41,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:54:41,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:54:41,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:54:41,109 INFO L87 Difference]: Start difference. First operand 27059 states and 39485 transitions. Second operand 4 states. [2020-10-28 18:54:44,563 WARN L193 SmtUtils]: Spent 915.00 ms on a formula simplification that was a NOOP. DAG size: 345