/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+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:50:53,096 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:50:53,100 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:50:53,158 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:50:53,159 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:50:53,166 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:50:53,168 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:50:53,174 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:50:53,177 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:50:53,185 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:50:53,186 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:50:53,187 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:50:53,187 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:50:53,190 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:50:53,191 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:50:53,193 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:50:53,194 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:50:53,195 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:50:53,197 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:50:53,200 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:50:53,202 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:50:53,203 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:50:53,205 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:50:53,206 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:50:53,235 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:50:53,236 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:50:53,236 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:50:53,237 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:50:53,238 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:50:53,239 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:50:53,240 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:50:53,244 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:50:53,245 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:50:53,256 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:50:53,258 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:50:53,258 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:50:53,259 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:50:53,259 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:50:53,259 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:50:53,260 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:50:53,261 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:50:53,272 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 18:50:53,324 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:50:53,324 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:50:53,329 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:50:53,329 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:50:53,330 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:50:53,330 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:50:53,330 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:50:53,330 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:50:53,331 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:50:53,331 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:50:53,332 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:50:53,332 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:50:53,333 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:50:53,333 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:50:53,333 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:50:53,333 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:50:53,334 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:50:53,334 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:50:53,334 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:50:53,334 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:50:53,335 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:50:53,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:50:53,335 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:50:53,335 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:50:53,335 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:50:53,336 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:50:53,336 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:50:53,336 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:50:53,336 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:50:53,337 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:50:53,779 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:50:53,816 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:50:53,820 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:50:53,822 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:50:53,823 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:50:53,825 INFO L432 ainManager$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+lhb-reducer.c [2020-10-28 18:50:53,909 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e1d516ae3/95be7bef6b5549449cbcf44adfd4a639/FLAGa9e698983 [2020-10-28 18:50:54,731 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:50:54,732 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+lhb-reducer.c [2020-10-28 18:50:54,770 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e1d516ae3/95be7bef6b5549449cbcf44adfd4a639/FLAGa9e698983 [2020-10-28 18:50:54,924 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e1d516ae3/95be7bef6b5549449cbcf44adfd4a639 [2020-10-28 18:50:54,930 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:50:54,938 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:50:54,945 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:50:54,945 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:50:54,949 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:50:54,950 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:50:54" (1/1) ... [2020-10-28 18:50:54,955 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5aca9a93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:50:54, skipping insertion in model container [2020-10-28 18:50:54,956 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:50:54" (1/1) ... [2020-10-28 18:50:54,964 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:50:55,060 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:50:55,634 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:50:55,675 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:50:55,985 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:50:56,012 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:50:56,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:50:56 WrapperNode [2020-10-28 18:50:56,013 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:50:56,014 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:50:56,014 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:50:56,014 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:50:56,029 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:50:56" (1/1) ... [2020-10-28 18:50:56,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:50:56" (1/1) ... [2020-10-28 18:50:56,058 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:50:56" (1/1) ... [2020-10-28 18:50:56,059 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:50:56" (1/1) ... [2020-10-28 18:50:56,124 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:50:56" (1/1) ... [2020-10-28 18:50:56,142 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:50:56" (1/1) ... [2020-10-28 18:50:56,150 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:50:56" (1/1) ... [2020-10-28 18:50:56,163 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:50:56,165 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:50:56,165 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:50:56,165 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:50:56,166 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:50:56" (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 18:50:56,250 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:50:56,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:50:56,251 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:50:56,251 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:50:56,251 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:50:56,251 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:50:56,252 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:50:56,252 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:50:56,252 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:50:56,252 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:50:56,252 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:50:56,253 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 18:50:56,253 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:50:56,253 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:50:56,253 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:50:56,253 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:50:56,254 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:50:56,254 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:50:56,254 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:50:56,254 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:50:56,254 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:50:56,254 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:50:56,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:50:56,255 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:50:56,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:50:56,255 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:50:56,255 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:50:56,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:50:58,299 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:50:58,299 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:50:58,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:50:58 BoogieIcfgContainer [2020-10-28 18:50:58,302 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:50:58,304 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:50:58,304 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:50:58,307 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:50:58,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:50:54" (1/3) ... [2020-10-28 18:50:58,309 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64b054ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:50:58, skipping insertion in model container [2020-10-28 18:50:58,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:50:56" (2/3) ... [2020-10-28 18:50:58,309 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64b054ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:50:58, skipping insertion in model container [2020-10-28 18:50:58,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:50:58" (3/3) ... [2020-10-28 18:50:58,311 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-28 18:50:58,322 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:50:58,327 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:50:58,338 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:50:58,371 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:50:58,371 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:50:58,371 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:50:58,372 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:50:58,372 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:50:58,372 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:50:58,372 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:50:58,372 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:50:58,401 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states. [2020-10-28 18:50:58,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 18:50:58,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:50:58,419 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] [2020-10-28 18:50:58,420 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:50:58,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:50:58,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1101731786, now seen corresponding path program 1 times [2020-10-28 18:50:58,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:50:58,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [369288693] [2020-10-28 18:50:58,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:50:58,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:50:59,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:59,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:59,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:59,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:59,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:00,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:01,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:03,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:03,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:03,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:03,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:03,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 18:51:03,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 18:51:03,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-28 18:51:03,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:03,929 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:03,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:51:03,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:51:03,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 18:51:03,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 18:51:04,824 WARN L193 SmtUtils]: Spent 607.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 18:51:04,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:51:04,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:04,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:04,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:04,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:51:04,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:51:04,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-10-28 18:51:04,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:04,923 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:04,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:51:04,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:51:04,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:51:04,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:51:04,969 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 18:51:04,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [369288693] [2020-10-28 18:51:04,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:51:04,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:51:04,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449371216] [2020-10-28 18:51:04,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:51:04,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:51:04,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:51:04,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:51:04,998 INFO L87 Difference]: Start difference. First operand 465 states. Second operand 8 states. [2020-10-28 18:51:05,784 WARN L193 SmtUtils]: Spent 685.00 ms on a formula simplification that was a NOOP. DAG size: 297 [2020-10-28 18:51:10,158 WARN L193 SmtUtils]: Spent 721.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-28 18:51:11,701 WARN L193 SmtUtils]: Spent 670.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2020-10-28 18:51:11,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:51:11,972 INFO L93 Difference]: Finished difference Result 851 states and 1458 transitions. [2020-10-28 18:51:11,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 18:51:11,974 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 55 [2020-10-28 18:51:11,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:51:12,027 INFO L225 Difference]: With dead ends: 851 [2020-10-28 18:51:12,027 INFO L226 Difference]: Without dead ends: 705 [2020-10-28 18:51:12,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-28 18:51:12,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2020-10-28 18:51:12,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 462. [2020-10-28 18:51:12,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 462 states. [2020-10-28 18:51:12,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 604 transitions. [2020-10-28 18:51:12,191 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 604 transitions. Word has length 55 [2020-10-28 18:51:12,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:51:12,192 INFO L481 AbstractCegarLoop]: Abstraction has 462 states and 604 transitions. [2020-10-28 18:51:12,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:51:12,192 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 604 transitions. [2020-10-28 18:51:12,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 18:51:12,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:51:12,200 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] [2020-10-28 18:51:12,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:51:12,200 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:51:12,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:51:12,201 INFO L82 PathProgramCache]: Analyzing trace with hash -2092309806, now seen corresponding path program 1 times [2020-10-28 18:51:12,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:51:12,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976806951] [2020-10-28 18:51:12,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:51:12,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:12,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:12,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:12,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:12,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:12,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:13,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:13,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:13,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:14,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:14,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:14,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:15,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:16,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:16,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:17,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:17,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 18:51:17,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 18:51:17,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 18:51:17,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:17,277 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:17,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:51:17,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-28 18:51:17,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 18:51:17,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 18:51:18,119 WARN L193 SmtUtils]: Spent 716.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 18:51:18,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:51:18,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:18,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:18,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:18,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:51:18,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:51:18,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 18:51:18,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:18,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:18,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:51:18,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:51:18,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:51:18,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:51:18,180 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 18:51:18,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976806951] [2020-10-28 18:51:18,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:51:18,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:51:18,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948524256] [2020-10-28 18:51:18,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:51:18,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:51:18,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:51:18,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:51:18,196 INFO L87 Difference]: Start difference. First operand 462 states and 604 transitions. Second operand 4 states. [2020-10-28 18:51:18,880 WARN L193 SmtUtils]: Spent 633.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-28 18:51:21,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:51:21,509 INFO L93 Difference]: Finished difference Result 729 states and 997 transitions. [2020-10-28 18:51:21,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:51:21,510 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-10-28 18:51:21,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:51:21,518 INFO L225 Difference]: With dead ends: 729 [2020-10-28 18:51:21,518 INFO L226 Difference]: Without dead ends: 586 [2020-10-28 18:51:21,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:51:21,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2020-10-28 18:51:21,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 580. [2020-10-28 18:51:21,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 580 states. [2020-10-28 18:51:21,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 778 transitions. [2020-10-28 18:51:21,570 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 778 transitions. Word has length 55 [2020-10-28 18:51:21,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:51:21,571 INFO L481 AbstractCegarLoop]: Abstraction has 580 states and 778 transitions. [2020-10-28 18:51:21,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:51:21,571 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 778 transitions. [2020-10-28 18:51:21,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 18:51:21,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:51:21,576 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] [2020-10-28 18:51:21,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:51:21,578 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:51:21,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:51:21,582 INFO L82 PathProgramCache]: Analyzing trace with hash -590777575, now seen corresponding path program 1 times [2020-10-28 18:51:21,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:51:21,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1605845597] [2020-10-28 18:51:21,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:51:21,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:21,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:21,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:21,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:21,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:22,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:22,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:22,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:22,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:22,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:23,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:23,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:23,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:26,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:26,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 18:51:26,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:51:26,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 18:51:26,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:26,638 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:26,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:51:26,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:51:26,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 18:51:26,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:51:27,423 WARN L193 SmtUtils]: Spent 607.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 18:51:27,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:51:27,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:27,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:27,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:27,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:51:27,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:51:27,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-28 18:51:27,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:27,505 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:27,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:51:27,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:51:27,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:51:27,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:51:27,541 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 18:51:27,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1605845597] [2020-10-28 18:51:27,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:51:27,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:51:27,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609004777] [2020-10-28 18:51:27,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:51:27,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:51:27,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:51:27,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:51:27,549 INFO L87 Difference]: Start difference. First operand 580 states and 778 transitions. Second operand 8 states. [2020-10-28 18:51:28,206 WARN L193 SmtUtils]: Spent 583.00 ms on a formula simplification that was a NOOP. DAG size: 297 [2020-10-28 18:51:31,341 WARN L193 SmtUtils]: Spent 711.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-28 18:51:32,903 WARN L193 SmtUtils]: Spent 687.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2020-10-28 18:51:33,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:51:33,175 INFO L93 Difference]: Finished difference Result 1464 states and 2103 transitions. [2020-10-28 18:51:33,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 18:51:33,176 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 55 [2020-10-28 18:51:33,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:51:33,184 INFO L225 Difference]: With dead ends: 1464 [2020-10-28 18:51:33,184 INFO L226 Difference]: Without dead ends: 1262 [2020-10-28 18:51:33,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-28 18:51:33,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1262 states. [2020-10-28 18:51:33,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1262 to 616. [2020-10-28 18:51:33,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 616 states. [2020-10-28 18:51:33,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 820 transitions. [2020-10-28 18:51:33,262 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 820 transitions. Word has length 55 [2020-10-28 18:51:33,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:51:33,265 INFO L481 AbstractCegarLoop]: Abstraction has 616 states and 820 transitions. [2020-10-28 18:51:33,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:51:33,265 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 820 transitions. [2020-10-28 18:51:33,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 18:51:33,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:51:33,267 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 18:51:33,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:51:33,268 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:51:33,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:51:33,269 INFO L82 PathProgramCache]: Analyzing trace with hash 425180388, now seen corresponding path program 1 times [2020-10-28 18:51:33,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:51:33,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [999391404] [2020-10-28 18:51:33,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:51:33,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:33,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:33,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:33,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:33,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:34,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:34,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:35,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:35,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:35,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:36,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:36,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:36,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:36,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:37,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:37,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:37,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:37,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:38,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:38,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:38,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 18:51:38,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-28 18:51:38,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 18:51:38,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:38,343 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:38,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:51:38,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:51:38,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 18:51:38,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:51:39,187 WARN L193 SmtUtils]: Spent 655.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 18:51:39,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:51:39,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:39,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:39,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:39,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:51:39,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:51:39,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-28 18:51:39,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:39,242 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:39,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:51:39,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:51:39,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:51:39,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:51:39,277 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 18:51:39,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [999391404] [2020-10-28 18:51:39,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:51:39,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:51:39,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10054494] [2020-10-28 18:51:39,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:51:39,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:51:39,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:51:39,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:51:39,280 INFO L87 Difference]: Start difference. First operand 616 states and 820 transitions. Second operand 8 states. [2020-10-28 18:51:40,043 WARN L193 SmtUtils]: Spent 699.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2020-10-28 18:51:43,241 WARN L193 SmtUtils]: Spent 700.00 ms on a formula simplification that was a NOOP. DAG size: 303 [2020-10-28 18:51:44,950 WARN L193 SmtUtils]: Spent 657.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-28 18:51:45,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:51:45,233 INFO L93 Difference]: Finished difference Result 1397 states and 1961 transitions. [2020-10-28 18:51:45,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 18:51:45,234 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2020-10-28 18:51:45,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:51:45,244 INFO L225 Difference]: With dead ends: 1397 [2020-10-28 18:51:45,244 INFO L226 Difference]: Without dead ends: 1222 [2020-10-28 18:51:45,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-28 18:51:45,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2020-10-28 18:51:45,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 659. [2020-10-28 18:51:45,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 659 states. [2020-10-28 18:51:45,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 882 transitions. [2020-10-28 18:51:45,297 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 882 transitions. Word has length 56 [2020-10-28 18:51:45,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:51:45,298 INFO L481 AbstractCegarLoop]: Abstraction has 659 states and 882 transitions. [2020-10-28 18:51:45,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:51:45,298 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 882 transitions. [2020-10-28 18:51:45,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 18:51:45,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:51:45,302 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:51:45,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 18:51:45,302 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:51:45,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:51:45,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1491503906, now seen corresponding path program 1 times [2020-10-28 18:51:45,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:51:45,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587203653] [2020-10-28 18:51:45,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:51:45,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:45,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:45,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:45,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:45,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:45,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:45,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:46,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:47,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:47,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:48,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:49,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:49,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:50,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:50,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 18:51:50,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:51:50,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 18:51:50,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:50,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:50,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:51:50,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:51:50,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 18:51:50,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:51:51,213 WARN L193 SmtUtils]: Spent 750.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 18:51:51,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:51:51,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:51,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:51,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:51,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:51:51,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:51:51,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-28 18:51:51,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:51,321 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:51,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:51:51,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:51:51,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:51:51,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:51:51,349 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 18:51:51,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1587203653] [2020-10-28 18:51:51,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:51:51,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:51:51,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996912447] [2020-10-28 18:51:51,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:51:51,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:51:51,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:51:51,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:51:51,354 INFO L87 Difference]: Start difference. First operand 659 states and 882 transitions. Second operand 8 states. [2020-10-28 18:51:52,076 WARN L193 SmtUtils]: Spent 648.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-28 18:51:55,136 WARN L193 SmtUtils]: Spent 654.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2020-10-28 18:51:56,829 WARN L193 SmtUtils]: Spent 670.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2020-10-28 18:51:57,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:51:57,136 INFO L93 Difference]: Finished difference Result 1522 states and 2137 transitions. [2020-10-28 18:51:57,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 18:51:57,136 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2020-10-28 18:51:57,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:51:57,143 INFO L225 Difference]: With dead ends: 1522 [2020-10-28 18:51:57,143 INFO L226 Difference]: Without dead ends: 1314 [2020-10-28 18:51:57,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-28 18:51:57,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1314 states. [2020-10-28 18:51:57,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1314 to 667. [2020-10-28 18:51:57,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 667 states. [2020-10-28 18:51:57,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 890 transitions. [2020-10-28 18:51:57,195 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 890 transitions. Word has length 56 [2020-10-28 18:51:57,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:51:57,196 INFO L481 AbstractCegarLoop]: Abstraction has 667 states and 890 transitions. [2020-10-28 18:51:57,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:51:57,196 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 890 transitions. [2020-10-28 18:51:57,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 18:51:57,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:51:57,197 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 18:51:57,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 18:51:57,198 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:51:57,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:51:57,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1876536965, now seen corresponding path program 1 times [2020-10-28 18:51:57,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:51:57,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [571141970] [2020-10-28 18:51:57,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:51:57,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:57,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:57,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:57,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:57,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:57,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:58,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:58,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:59,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:59,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:59,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:59,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:00,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:01,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:01,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:02,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:02,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:02,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 18:52:02,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 18:52:02,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 18:52:02,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:02,238 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:02,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:52:02,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:52:02,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 18:52:02,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:03,273 WARN L193 SmtUtils]: Spent 653.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 18:52:03,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:52:03,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:03,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:03,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:03,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:52:03,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:52:03,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 18:52:03,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:03,302 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:03,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:52:03,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:52:03,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:52:03,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:03,341 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 18:52:03,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [571141970] [2020-10-28 18:52:03,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:52:03,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:52:03,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641000830] [2020-10-28 18:52:03,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:52:03,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:52:03,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:52:03,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:52:03,344 INFO L87 Difference]: Start difference. First operand 667 states and 890 transitions. Second operand 8 states. [2020-10-28 18:52:04,148 WARN L193 SmtUtils]: Spent 731.00 ms on a formula simplification that was a NOOP. DAG size: 311 [2020-10-28 18:52:07,674 WARN L193 SmtUtils]: Spent 759.00 ms on a formula simplification that was a NOOP. DAG size: 309 [2020-10-28 18:52:08,842 WARN L193 SmtUtils]: Spent 689.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 18:52:09,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:52:09,825 INFO L93 Difference]: Finished difference Result 2074 states and 2936 transitions. [2020-10-28 18:52:09,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 18:52:09,826 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-10-28 18:52:09,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:52:09,839 INFO L225 Difference]: With dead ends: 2074 [2020-10-28 18:52:09,839 INFO L226 Difference]: Without dead ends: 1850 [2020-10-28 18:52:09,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-28 18:52:09,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1850 states. [2020-10-28 18:52:09,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1850 to 667. [2020-10-28 18:52:09,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 667 states. [2020-10-28 18:52:09,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 890 transitions. [2020-10-28 18:52:09,919 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 890 transitions. Word has length 57 [2020-10-28 18:52:09,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:52:09,920 INFO L481 AbstractCegarLoop]: Abstraction has 667 states and 890 transitions. [2020-10-28 18:52:09,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:52:09,920 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 890 transitions. [2020-10-28 18:52:09,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 18:52:09,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:52:09,923 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 18:52:09,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 18:52:09,923 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:52:09,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:52:09,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1710846274, now seen corresponding path program 1 times [2020-10-28 18:52:09,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:52:09,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [53980179] [2020-10-28 18:52:09,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:52:09,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:09,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:10,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:10,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:10,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:10,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:11,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:11,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:12,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:12,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:12,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:12,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:12,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:13,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:14,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:14,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:14,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 18:52:14,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 18:52:14,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 18:52:14,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:14,965 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:14,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:52:14,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 18:52:14,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 18:52:14,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:15,627 WARN L193 SmtUtils]: Spent 613.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 18:52:15,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:52:15,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:15,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:15,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:15,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:52:15,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:52:15,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 18:52:15,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:15,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:15,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:52:15,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:52:15,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:52:15,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:52:15,677 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 18:52:15,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [53980179] [2020-10-28 18:52:15,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:52:15,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:52:15,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350292064] [2020-10-28 18:52:15,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:52:15,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:52:15,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:52:15,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:52:15,681 INFO L87 Difference]: Start difference. First operand 667 states and 890 transitions. Second operand 4 states. [2020-10-28 18:52:16,397 WARN L193 SmtUtils]: Spent 667.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-28 18:52:19,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:52:19,136 INFO L93 Difference]: Finished difference Result 1071 states and 1465 transitions. [2020-10-28 18:52:19,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:52:19,137 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-10-28 18:52:19,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:52:19,141 INFO L225 Difference]: With dead ends: 1071 [2020-10-28 18:52:19,141 INFO L226 Difference]: Without dead ends: 860 [2020-10-28 18:52:19,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:52:19,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2020-10-28 18:52:19,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 857. [2020-10-28 18:52:19,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 857 states. [2020-10-28 18:52:19,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 1154 transitions. [2020-10-28 18:52:19,236 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 1154 transitions. Word has length 57 [2020-10-28 18:52:19,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:52:19,237 INFO L481 AbstractCegarLoop]: Abstraction has 857 states and 1154 transitions. [2020-10-28 18:52:19,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:52:19,237 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 1154 transitions. [2020-10-28 18:52:19,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 18:52:19,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:52:19,239 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 18:52:19,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 18:52:19,239 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:52:19,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:52:19,240 INFO L82 PathProgramCache]: Analyzing trace with hash -703147839, now seen corresponding path program 1 times [2020-10-28 18:52:19,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:52:19,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1406620484] [2020-10-28 18:52:19,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:52:19,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:19,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:19,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:19,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:19,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:19,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:20,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:20,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:21,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:21,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:21,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:21,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:21,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:22,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:22,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:23,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:23,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:23,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:23,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:24,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:24,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:24,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 18:52:24,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-28 18:52:24,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 18:52:24,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:24,281 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:24,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:52:24,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:52:24,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-28 18:52:24,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:25,040 WARN L193 SmtUtils]: Spent 666.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 18:52:25,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:52:25,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:25,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:25,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:25,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:52:25,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:52:25,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-28 18:52:25,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:25,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:25,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:52:25,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:52:25,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:52:25,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:25,131 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 18:52:25,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1406620484] [2020-10-28 18:52:25,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:52:25,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:52:25,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552720354] [2020-10-28 18:52:25,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 18:52:25,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:52:25,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 18:52:25,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:52:25,135 INFO L87 Difference]: Start difference. First operand 857 states and 1154 transitions. Second operand 7 states. [2020-10-28 18:52:25,885 WARN L193 SmtUtils]: Spent 686.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-28 18:52:28,962 WARN L193 SmtUtils]: Spent 789.00 ms on a formula simplification that was a NOOP. DAG size: 300 [2020-10-28 18:52:30,527 WARN L193 SmtUtils]: Spent 677.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2020-10-28 18:52:30,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:52:30,963 INFO L93 Difference]: Finished difference Result 2044 states and 2866 transitions. [2020-10-28 18:52:30,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 18:52:30,965 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 57 [2020-10-28 18:52:30,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:52:30,974 INFO L225 Difference]: With dead ends: 2044 [2020-10-28 18:52:30,974 INFO L226 Difference]: Without dead ends: 1781 [2020-10-28 18:52:30,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2020-10-28 18:52:30,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1781 states. [2020-10-28 18:52:31,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1781 to 889. [2020-10-28 18:52:31,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 889 states. [2020-10-28 18:52:31,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 1200 transitions. [2020-10-28 18:52:31,097 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 1200 transitions. Word has length 57 [2020-10-28 18:52:31,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:52:31,098 INFO L481 AbstractCegarLoop]: Abstraction has 889 states and 1200 transitions. [2020-10-28 18:52:31,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 18:52:31,098 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 1200 transitions. [2020-10-28 18:52:31,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 18:52:31,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:52:31,110 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 18:52:31,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 18:52:31,110 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:52:31,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:52:31,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1091941505, now seen corresponding path program 1 times [2020-10-28 18:52:31,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:52:31,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1477600650] [2020-10-28 18:52:31,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:52:31,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:31,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:31,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:31,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:31,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:31,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:31,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:32,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:32,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:32,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:32,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:32,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:33,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:33,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:34,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:34,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:34,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:35,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:36,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:36,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 18:52:36,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-28 18:52:36,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 18:52:36,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:36,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:36,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:52:36,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:52:36,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 18:52:36,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:36,879 WARN L193 SmtUtils]: Spent 640.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 18:52:36,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:52:36,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:36,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:36,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:36,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:52:36,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:52:36,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 18:52:36,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:36,916 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:36,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:52:36,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:52:36,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:52:36,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:36,936 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 18:52:36,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1477600650] [2020-10-28 18:52:36,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:52:36,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:52:36,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355102765] [2020-10-28 18:52:36,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:52:36,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:52:36,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:52:36,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:52:36,939 INFO L87 Difference]: Start difference. First operand 889 states and 1200 transitions. Second operand 6 states. [2020-10-28 18:52:37,710 WARN L193 SmtUtils]: Spent 703.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-28 18:52:40,353 WARN L193 SmtUtils]: Spent 683.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2020-10-28 18:52:40,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:52:40,779 INFO L93 Difference]: Finished difference Result 1812 states and 2494 transitions. [2020-10-28 18:52:40,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:52:40,780 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-10-28 18:52:40,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:52:40,786 INFO L225 Difference]: With dead ends: 1812 [2020-10-28 18:52:40,786 INFO L226 Difference]: Without dead ends: 1171 [2020-10-28 18:52:40,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:52:40,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2020-10-28 18:52:40,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 1162. [2020-10-28 18:52:40,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1162 states. [2020-10-28 18:52:40,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1585 transitions. [2020-10-28 18:52:40,923 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1585 transitions. Word has length 58 [2020-10-28 18:52:40,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:52:40,924 INFO L481 AbstractCegarLoop]: Abstraction has 1162 states and 1585 transitions. [2020-10-28 18:52:40,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:52:40,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1585 transitions. [2020-10-28 18:52:40,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 18:52:40,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:52:40,926 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 18:52:40,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 18:52:40,926 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:52:40,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:52:40,927 INFO L82 PathProgramCache]: Analyzing trace with hash -2032830262, now seen corresponding path program 1 times [2020-10-28 18:52:40,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:52:40,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954251001] [2020-10-28 18:52:40,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:52:40,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:40,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:41,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:41,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:41,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:41,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:42,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:42,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:42,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:42,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:42,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:43,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:43,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:44,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:44,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:44,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:44,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:44,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:45,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:45,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:45,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 18:52:45,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-28 18:52:45,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 18:52:45,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:45,970 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:45,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 18:52:45,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:52:45,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 18:52:45,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:46,761 WARN L193 SmtUtils]: Spent 622.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 18:52:46,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:52:46,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:46,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:46,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:46,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:52:46,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:52:46,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 18:52:46,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:46,786 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:46,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:52:46,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:52:46,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:52:46,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:46,803 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 18:52:46,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [954251001] [2020-10-28 18:52:46,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:52:46,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 18:52:46,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379846779] [2020-10-28 18:52:46,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 18:52:46,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:52:46,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 18:52:46,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:52:46,805 INFO L87 Difference]: Start difference. First operand 1162 states and 1585 transitions. Second operand 9 states. [2020-10-28 18:52:47,528 WARN L193 SmtUtils]: Spent 647.00 ms on a formula simplification that was a NOOP. DAG size: 300 [2020-10-28 18:52:50,567 WARN L193 SmtUtils]: Spent 705.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2020-10-28 18:52:53,191 WARN L193 SmtUtils]: Spent 713.00 ms on a formula simplification that was a NOOP. DAG size: 300 [2020-10-28 18:52:53,908 WARN L193 SmtUtils]: Spent 675.00 ms on a formula simplification that was a NOOP. DAG size: 302 [2020-10-28 18:52:54,814 WARN L193 SmtUtils]: Spent 703.00 ms on a formula simplification that was a NOOP. DAG size: 303 [2020-10-28 18:52:55,733 WARN L193 SmtUtils]: Spent 673.00 ms on a formula simplification that was a NOOP. DAG size: 293 [2020-10-28 18:52:57,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:52:57,549 INFO L93 Difference]: Finished difference Result 6534 states and 9505 transitions. [2020-10-28 18:52:57,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 18:52:57,550 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 59 [2020-10-28 18:52:57,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:52:57,575 INFO L225 Difference]: With dead ends: 6534 [2020-10-28 18:52:57,575 INFO L226 Difference]: Without dead ends: 5786 [2020-10-28 18:52:57,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=232, Invalid=824, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 18:52:57,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5786 states. [2020-10-28 18:52:58,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5786 to 2410. [2020-10-28 18:52:58,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2410 states. [2020-10-28 18:52:58,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2410 states to 2410 states and 3469 transitions. [2020-10-28 18:52:58,043 INFO L78 Accepts]: Start accepts. Automaton has 2410 states and 3469 transitions. Word has length 59 [2020-10-28 18:52:58,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:52:58,043 INFO L481 AbstractCegarLoop]: Abstraction has 2410 states and 3469 transitions. [2020-10-28 18:52:58,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 18:52:58,044 INFO L276 IsEmpty]: Start isEmpty. Operand 2410 states and 3469 transitions. [2020-10-28 18:52:58,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 18:52:58,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:52:58,046 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] [2020-10-28 18:52:58,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 18:52:58,047 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:52:58,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:52:58,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1834357340, now seen corresponding path program 1 times [2020-10-28 18:52:58,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:52:58,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [106027812] [2020-10-28 18:52:58,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:52:58,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:58,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:58,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:58,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:59,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:59,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:01,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:53:01,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 18:53:01,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:53:01,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3763 [2020-10-28 18:53:01,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:53:01,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:53:01,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:53:01,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 18:53:01,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 18:53:01,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:53:02,561 WARN L193 SmtUtils]: Spent 685.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 18:53:02,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:53:02,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:53:02,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:02,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:53:02,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:53:02,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:53:02,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 18:53:02,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:53:02,582 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:53:02,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:53:02,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:53:02,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:53:02,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:53:02,595 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 18:53:02,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [106027812] [2020-10-28 18:53:02,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:53:02,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:53:02,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708491643] [2020-10-28 18:53:02,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:53:02,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:53:02,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:53:02,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:53:02,598 INFO L87 Difference]: Start difference. First operand 2410 states and 3469 transitions. Second operand 4 states. [2020-10-28 18:53:04,855 WARN L193 SmtUtils]: Spent 701.00 ms on a formula simplification that was a NOOP. DAG size: 297 [2020-10-28 18:53:05,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:53:05,628 INFO L93 Difference]: Finished difference Result 6099 states and 8880 transitions. [2020-10-28 18:53:05,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:53:05,629 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-10-28 18:53:05,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:53:05,644 INFO L225 Difference]: With dead ends: 6099 [2020-10-28 18:53:05,644 INFO L226 Difference]: Without dead ends: 4126 [2020-10-28 18:53:05,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:53:05,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4126 states. [2020-10-28 18:53:06,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4126 to 4120. [2020-10-28 18:53:06,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4120 states. [2020-10-28 18:53:06,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4120 states to 4120 states and 5863 transitions. [2020-10-28 18:53:06,468 INFO L78 Accepts]: Start accepts. Automaton has 4120 states and 5863 transitions. Word has length 60 [2020-10-28 18:53:06,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:53:06,468 INFO L481 AbstractCegarLoop]: Abstraction has 4120 states and 5863 transitions. [2020-10-28 18:53:06,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:53:06,468 INFO L276 IsEmpty]: Start isEmpty. Operand 4120 states and 5863 transitions. [2020-10-28 18:53:06,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 18:53:06,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:53:06,472 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 18:53:06,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 18:53:06,473 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:53:06,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:53:06,473 INFO L82 PathProgramCache]: Analyzing trace with hash -180358541, now seen corresponding path program 1 times [2020-10-28 18:53:06,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:53:06,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710952850] [2020-10-28 18:53:06,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:53:06,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:53:06,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:06,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:06,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:07,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:07,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:09,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:53:09,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 18:53:09,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:53:09,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2726 [2020-10-28 18:53:09,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:53:09,232 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:53:09,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:53:09,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 18:53:09,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 18:53:09,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:53:09,934 WARN L193 SmtUtils]: Spent 671.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 18:53:09,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:53:09,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:53:09,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:09,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:53:09,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:53:09,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:53:09,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 18:53:09,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:53:09,951 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:53:09,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:53:09,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:53:09,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:53:09,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:53:09,967 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 18:53:09,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710952850] [2020-10-28 18:53:09,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:53:09,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:53:09,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847202523] [2020-10-28 18:53:09,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:53:09,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:53:09,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:53:09,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:53:09,969 INFO L87 Difference]: Start difference. First operand 4120 states and 5863 transitions. Second operand 4 states. [2020-10-28 18:53:10,715 WARN L193 SmtUtils]: Spent 703.00 ms on a formula simplification that was a NOOP. DAG size: 293 [2020-10-28 18:53:13,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:53:13,377 INFO L93 Difference]: Finished difference Result 10666 states and 15430 transitions. [2020-10-28 18:53:13,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:53:13,377 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2020-10-28 18:53:13,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:53:13,406 INFO L225 Difference]: With dead ends: 10666 [2020-10-28 18:53:13,406 INFO L226 Difference]: Without dead ends: 6862 [2020-10-28 18:53:13,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:53:13,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6862 states. [2020-10-28 18:53:14,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6862 to 5238. [2020-10-28 18:53:14,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5238 states. [2020-10-28 18:53:14,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5238 states to 5238 states and 7535 transitions. [2020-10-28 18:53:14,508 INFO L78 Accepts]: Start accepts. Automaton has 5238 states and 7535 transitions. Word has length 61 [2020-10-28 18:53:14,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:53:14,508 INFO L481 AbstractCegarLoop]: Abstraction has 5238 states and 7535 transitions. [2020-10-28 18:53:14,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:53:14,509 INFO L276 IsEmpty]: Start isEmpty. Operand 5238 states and 7535 transitions. [2020-10-28 18:53:14,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-28 18:53:14,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:53:14,513 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] [2020-10-28 18:53:14,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 18:53:14,513 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:53:14,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:53:14,514 INFO L82 PathProgramCache]: Analyzing trace with hash 17275653, now seen corresponding path program 1 times [2020-10-28 18:53:14,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:53:14,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1930482332] [2020-10-28 18:53:14,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:53:14,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:53:14,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:14,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:14,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:15,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:15,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:15,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:15,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:16,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:18,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:53:18,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 18:53:18,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:53:18,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3822 [2020-10-28 18:53:18,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:53:18,372 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:53:18,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 18:53:18,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:53:18,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 18:53:18,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:53:19,235 WARN L193 SmtUtils]: Spent 626.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 18:53:19,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:53:19,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:53:19,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:19,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:53:19,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:53:19,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:53:19,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 18:53:19,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:53:19,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:53:19,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:53:19,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:53:19,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:53:19,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:53:19,276 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 18:53:19,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1930482332] [2020-10-28 18:53:19,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:53:19,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 18:53:19,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409380003] [2020-10-28 18:53:19,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 18:53:19,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:53:19,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 18:53:19,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:53:19,279 INFO L87 Difference]: Start difference. First operand 5238 states and 7535 transitions. Second operand 9 states. [2020-10-28 18:53:20,034 WARN L193 SmtUtils]: Spent 681.00 ms on a formula simplification that was a NOOP. DAG size: 304 [2020-10-28 18:53:23,940 WARN L193 SmtUtils]: Spent 736.00 ms on a formula simplification that was a NOOP. DAG size: 303 [2020-10-28 18:53:24,959 WARN L193 SmtUtils]: Spent 734.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-28 18:53:27,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:53:27,396 INFO L93 Difference]: Finished difference Result 17795 states and 25889 transitions. [2020-10-28 18:53:27,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 18:53:27,397 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 62 [2020-10-28 18:53:27,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:53:27,440 INFO L225 Difference]: With dead ends: 17795 [2020-10-28 18:53:27,440 INFO L226 Difference]: Without dead ends: 17790 [2020-10-28 18:53:27,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2020-10-28 18:53:27,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17790 states. [2020-10-28 18:53:28,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17790 to 5235. [2020-10-28 18:53:28,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5235 states. [2020-10-28 18:53:28,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5235 states to 5235 states and 7531 transitions. [2020-10-28 18:53:28,353 INFO L78 Accepts]: Start accepts. Automaton has 5235 states and 7531 transitions. Word has length 62 [2020-10-28 18:53:28,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:53:28,354 INFO L481 AbstractCegarLoop]: Abstraction has 5235 states and 7531 transitions. [2020-10-28 18:53:28,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 18:53:28,354 INFO L276 IsEmpty]: Start isEmpty. Operand 5235 states and 7531 transitions. [2020-10-28 18:53:28,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 18:53:28,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:53:28,360 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:53:28,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 18:53:28,361 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:53:28,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:53:28,361 INFO L82 PathProgramCache]: Analyzing trace with hash 2063072488, now seen corresponding path program 1 times [2020-10-28 18:53:28,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:53:28,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [336872032] [2020-10-28 18:53:28,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:53:28,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:53:28,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:28,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:28,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:28,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:28,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:28,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:29,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:33,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:53:33,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 18:53:33,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:53:33,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 18:53:33,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:53:33,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:53:33,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:53:33,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 18:53:33,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 18:53:33,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:53:34,189 WARN L193 SmtUtils]: Spent 752.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 18:53:34,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:53:34,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:53:34,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:34,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:53:34,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:53:34,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:53:34,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 18:53:34,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:53:34,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:53:34,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:53:34,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:53:34,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:53:34,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:53:34,241 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 18:53:34,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [336872032] [2020-10-28 18:53:34,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:53:34,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:53:34,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466821348] [2020-10-28 18:53:34,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:53:34,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:53:34,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:53:34,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:53:34,243 INFO L87 Difference]: Start difference. First operand 5235 states and 7531 transitions. Second operand 4 states. [2020-10-28 18:53:35,018 WARN L193 SmtUtils]: Spent 718.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-28 18:53:37,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:53:37,969 INFO L93 Difference]: Finished difference Result 13317 states and 19377 transitions. [2020-10-28 18:53:37,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:53:37,970 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-10-28 18:53:37,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:53:37,992 INFO L225 Difference]: With dead ends: 13317 [2020-10-28 18:53:37,992 INFO L226 Difference]: Without dead ends: 9181 [2020-10-28 18:53:38,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:53:38,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9181 states. [2020-10-28 18:53:39,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9181 to 9178. [2020-10-28 18:53:39,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9178 states. [2020-10-28 18:53:39,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9178 states to 9178 states and 13153 transitions. [2020-10-28 18:53:39,759 INFO L78 Accepts]: Start accepts. Automaton has 9178 states and 13153 transitions. Word has length 71 [2020-10-28 18:53:39,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:53:39,759 INFO L481 AbstractCegarLoop]: Abstraction has 9178 states and 13153 transitions. [2020-10-28 18:53:39,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:53:39,760 INFO L276 IsEmpty]: Start isEmpty. Operand 9178 states and 13153 transitions. [2020-10-28 18:53:39,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 18:53:39,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:53:39,768 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 18:53:39,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 18:53:39,768 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:53:39,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:53:39,769 INFO L82 PathProgramCache]: Analyzing trace with hash -718413138, now seen corresponding path program 1 times [2020-10-28 18:53:39,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:53:39,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [668099349] [2020-10-28 18:53:39,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:53:39,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:53:39,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:39,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:39,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:40,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:40,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:42,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:53:42,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 18:53:42,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:53:42,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2782 [2020-10-28 18:53:42,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:53:42,583 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:53:42,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:53:42,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-28 18:53:42,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 18:53:42,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:53:43,323 WARN L193 SmtUtils]: Spent 671.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 18:53:43,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:53:43,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:53:43,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:43,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:53:43,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:53:43,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:53:43,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 18:53:43,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:53:43,355 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:53:43,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:53:43,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:53:43,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:53:43,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:53:43,378 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 18:53:43,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [668099349] [2020-10-28 18:53:43,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:53:43,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:53:43,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061419138] [2020-10-28 18:53:43,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:53:43,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:53:43,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:53:43,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:53:43,380 INFO L87 Difference]: Start difference. First operand 9178 states and 13153 transitions. Second operand 4 states. [2020-10-28 18:53:44,146 WARN L193 SmtUtils]: Spent 717.00 ms on a formula simplification that was a NOOP. DAG size: 300 [2020-10-28 18:53:48,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:53:48,328 INFO L93 Difference]: Finished difference Result 22130 states and 31769 transitions. [2020-10-28 18:53:48,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:53:48,329 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-10-28 18:53:48,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:53:48,363 INFO L225 Difference]: With dead ends: 22130 [2020-10-28 18:53:48,363 INFO L226 Difference]: Without dead ends: 14065 [2020-10-28 18:53:48,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:53:48,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14065 states. [2020-10-28 18:53:51,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14065 to 13280. [2020-10-28 18:53:51,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13280 states. [2020-10-28 18:53:51,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13280 states to 13280 states and 18867 transitions. [2020-10-28 18:53:51,126 INFO L78 Accepts]: Start accepts. Automaton has 13280 states and 18867 transitions. Word has length 72 [2020-10-28 18:53:51,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:53:51,126 INFO L481 AbstractCegarLoop]: Abstraction has 13280 states and 18867 transitions. [2020-10-28 18:53:51,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:53:51,126 INFO L276 IsEmpty]: Start isEmpty. Operand 13280 states and 18867 transitions. [2020-10-28 18:53:51,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 18:53:51,133 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:53:51,133 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:53:51,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 18:53:51,133 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:53:51,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:53:51,134 INFO L82 PathProgramCache]: Analyzing trace with hash 45909317, now seen corresponding path program 1 times [2020-10-28 18:53:51,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:53:51,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1997769921] [2020-10-28 18:53:51,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:53:51,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:53:51,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:51,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:51,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:51,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:52,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:53:52,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 18:53:52,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 18:53:52,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1591 [2020-10-28 18:53:52,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:53:52,761 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:53:52,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:53:52,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-28 18:53:52,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 18:53:52,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:53:53,499 WARN L193 SmtUtils]: Spent 671.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 18:53:53,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:53:53,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:53:53,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:53,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:53:53,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:53:53,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:53:53,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 18:53:53,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:53:53,518 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:53:53,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:53:53,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:53:53,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:53:53,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:53:53,537 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 18:53:53,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1997769921] [2020-10-28 18:53:53,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:53:53,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:53:53,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485775548] [2020-10-28 18:53:53,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:53:53,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:53:53,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:53:53,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:53:53,539 INFO L87 Difference]: Start difference. First operand 13280 states and 18867 transitions. Second operand 4 states. [2020-10-28 18:53:54,297 WARN L193 SmtUtils]: Spent 706.00 ms on a formula simplification that was a NOOP. DAG size: 300 [2020-10-28 18:54:00,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:54:00,656 INFO L93 Difference]: Finished difference Result 36270 states and 51567 transitions. [2020-10-28 18:54:00,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:54:00,657 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-10-28 18:54:00,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:54:00,699 INFO L225 Difference]: With dead ends: 36270 [2020-10-28 18:54:00,699 INFO L226 Difference]: Without dead ends: 24103 [2020-10-28 18:54:00,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:54:00,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24103 states. [2020-10-28 18:54:05,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24103 to 21916. [2020-10-28 18:54:05,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21916 states. [2020-10-28 18:54:05,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21916 states to 21916 states and 30931 transitions. [2020-10-28 18:54:05,290 INFO L78 Accepts]: Start accepts. Automaton has 21916 states and 30931 transitions. Word has length 73 [2020-10-28 18:54:05,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:54:05,291 INFO L481 AbstractCegarLoop]: Abstraction has 21916 states and 30931 transitions. [2020-10-28 18:54:05,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:54:05,291 INFO L276 IsEmpty]: Start isEmpty. Operand 21916 states and 30931 transitions. [2020-10-28 18:54:05,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 18:54:05,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:54:05,294 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:54:05,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 18:54:05,295 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:54:05,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:54:05,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1154962273, now seen corresponding path program 1 times [2020-10-28 18:54:05,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:54:05,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [870015255] [2020-10-28 18:54:05,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:54:05,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:54:05,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:05,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:05,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:06,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:54:06,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 18:54:06,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 18:54:06,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 716 [2020-10-28 18:54:06,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:54:06,037 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:54:06,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:54:06,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-28 18:54:06,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 18:54:06,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:54:06,775 WARN L193 SmtUtils]: Spent 672.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 18:54:06,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:54:06,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:54:06,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:06,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:54:06,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:54:06,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:54:06,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 18:54:06,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:54:06,799 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:54:06,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:54:06,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:54:06,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:54:06,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:54:06,818 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 18:54:06,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [870015255] [2020-10-28 18:54:06,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:54:06,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:54:06,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838060672] [2020-10-28 18:54:06,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:54:06,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:54:06,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:54:06,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:54:06,820 INFO L87 Difference]: Start difference. First operand 21916 states and 30931 transitions. Second operand 4 states. [2020-10-28 18:54:07,590 WARN L193 SmtUtils]: Spent 722.00 ms on a formula simplification that was a NOOP. DAG size: 300 [2020-10-28 18:54:16,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:54:16,927 INFO L93 Difference]: Finished difference Result 59938 states and 84343 transitions. [2020-10-28 18:54:16,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:54:16,928 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 74 [2020-10-28 18:54:16,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:54:16,980 INFO L225 Difference]: With dead ends: 59938 [2020-10-28 18:54:16,980 INFO L226 Difference]: Without dead ends: 38931 [2020-10-28 18:54:17,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:54:17,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38931 states. [2020-10-28 18:54:24,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38931 to 35344. [2020-10-28 18:54:24,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35344 states. [2020-10-28 18:54:24,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35344 states to 35344 states and 49117 transitions. [2020-10-28 18:54:24,185 INFO L78 Accepts]: Start accepts. Automaton has 35344 states and 49117 transitions. Word has length 74 [2020-10-28 18:54:24,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:54:24,185 INFO L481 AbstractCegarLoop]: Abstraction has 35344 states and 49117 transitions. [2020-10-28 18:54:24,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:54:24,185 INFO L276 IsEmpty]: Start isEmpty. Operand 35344 states and 49117 transitions. [2020-10-28 18:54:24,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 18:54:24,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:54:24,188 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:54:24,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 18:54:24,188 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:54:24,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:54:24,189 INFO L82 PathProgramCache]: Analyzing trace with hash 515453143, now seen corresponding path program 1 times [2020-10-28 18:54:24,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:54:24,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614322674] [2020-10-28 18:54:24,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:54:24,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:54:24,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:24,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:24,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:24,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:24,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:24,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:24,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:24,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:24,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:25,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:54:25,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 18:54:25,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 18:54:25,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1087 [2020-10-28 18:54:25,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:54:25,307 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:54:25,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:54:25,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 18:54:25,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-28 18:54:25,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:54:25,993 WARN L193 SmtUtils]: Spent 620.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 18:54:25,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:54:26,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:54:26,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:26,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:54:26,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:54:26,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:54:26,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 18:54:26,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:54:26,013 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:54:26,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:54:26,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:54:26,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:54:26,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:54:26,043 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 18:54:26,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [614322674] [2020-10-28 18:54:26,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:54:26,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:54:26,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195038160] [2020-10-28 18:54:26,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:54:26,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:54:26,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:54:26,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:54:26,045 INFO L87 Difference]: Start difference. First operand 35344 states and 49117 transitions. Second operand 6 states. [2020-10-28 18:54:29,059 WARN L193 SmtUtils]: Spent 727.00 ms on a formula simplification that was a NOOP. DAG size: 303 [2020-10-28 18:54:29,879 WARN L193 SmtUtils]: Spent 723.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-28 18:54:30,687 WARN L193 SmtUtils]: Spent 691.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2020-10-28 18:54:35,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:54:35,834 INFO L93 Difference]: Finished difference Result 45875 states and 63543 transitions. [2020-10-28 18:54:35,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 18:54:35,834 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 74 [2020-10-28 18:54:35,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:54:35,867 INFO L225 Difference]: With dead ends: 45875 [2020-10-28 18:54:35,867 INFO L226 Difference]: Without dead ends: 23295 [2020-10-28 18:54:35,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:54:35,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23295 states.