/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/eca-rers2012/Problem03_label16.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 10:13:50,699 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 10:13:50,702 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 10:13:50,751 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 10:13:50,752 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 10:13:50,758 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 10:13:50,761 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 10:13:50,767 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 10:13:50,769 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 10:13:50,771 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 10:13:50,772 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 10:13:50,774 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 10:13:50,774 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 10:13:50,776 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 10:13:50,777 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 10:13:50,778 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 10:13:50,780 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 10:13:50,781 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 10:13:50,794 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 10:13:50,796 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 10:13:50,798 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 10:13:50,800 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 10:13:50,801 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 10:13:50,802 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 10:13:50,806 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 10:13:50,806 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 10:13:50,807 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 10:13:50,808 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 10:13:50,808 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 10:13:50,810 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 10:13:50,810 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 10:13:50,811 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 10:13:50,812 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 10:13:50,813 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 10:13:50,814 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 10:13:50,815 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 10:13:50,816 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 10:13:50,816 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 10:13:50,816 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 10:13:50,817 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 10:13:50,818 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 10:13:50,819 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 10:13:50,848 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 10:13:50,848 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 10:13:50,850 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 10:13:50,850 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 10:13:50,851 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 10:13:50,851 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 10:13:50,851 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 10:13:50,851 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 10:13:50,852 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 10:13:50,852 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 10:13:50,852 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 10:13:50,852 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 10:13:50,853 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 10:13:50,853 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 10:13:50,853 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 10:13:50,854 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 10:13:50,854 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 10:13:50,854 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 10:13:50,854 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 10:13:50,855 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 10:13:50,855 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 10:13:50,855 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 10:13:50,856 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 10:13:50,856 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 10:13:50,856 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 10:13:50,856 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 10:13:50,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 10:13:50,857 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 10:13:50,857 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 10:13:50,857 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 10:13:51,238 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 10:13:51,270 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 10:13:51,273 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 10:13:51,275 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 10:13:51,275 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 10:13:51,277 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label16.c [2020-10-28 10:13:51,363 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d79e8f47b/a2ed53c1b54e4566b6512a23cb004fb1/FLAG6b88dc017 [2020-10-28 10:13:52,258 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 10:13:52,259 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem03_label16.c [2020-10-28 10:13:52,277 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d79e8f47b/a2ed53c1b54e4566b6512a23cb004fb1/FLAG6b88dc017 [2020-10-28 10:13:52,357 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d79e8f47b/a2ed53c1b54e4566b6512a23cb004fb1 [2020-10-28 10:13:52,361 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 10:13:52,370 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 10:13:52,374 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 10:13:52,374 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 10:13:52,378 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 10:13:52,380 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:13:52" (1/1) ... [2020-10-28 10:13:52,384 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e70e563 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:13:52, skipping insertion in model container [2020-10-28 10:13:52,385 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:13:52" (1/1) ... [2020-10-28 10:13:52,393 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 10:13:52,481 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 10:13:53,245 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 10:13:53,257 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 10:13:53,458 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 10:13:53,481 INFO L208 MainTranslator]: Completed translation [2020-10-28 10:13:53,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:13:53 WrapperNode [2020-10-28 10:13:53,482 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 10:13:53,483 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 10:13:53,483 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 10:13:53,483 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 10:13:53,498 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:13:53" (1/1) ... [2020-10-28 10:13:53,498 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:13:53" (1/1) ... [2020-10-28 10:13:53,546 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:13:53" (1/1) ... [2020-10-28 10:13:53,547 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:13:53" (1/1) ... [2020-10-28 10:13:53,697 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:13:53" (1/1) ... [2020-10-28 10:13:53,712 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:13:53" (1/1) ... [2020-10-28 10:13:53,725 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:13:53" (1/1) ... [2020-10-28 10:13:53,743 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 10:13:53,744 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 10:13:53,744 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 10:13:53,744 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 10:13:53,745 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:13:53" (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 10:13:53,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 10:13:53,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 10:13:53,835 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 10:13:53,836 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 10:13:53,836 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 10:13:53,837 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 10:13:53,837 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 10:13:53,837 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 10:13:53,837 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 10:13:53,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 10:13:53,838 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 10:13:53,839 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 10:13:53,839 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 10:13:53,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 10:13:53,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 10:13:53,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 10:13:53,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 10:13:53,841 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 10:13:53,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 10:13:56,185 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 10:13:56,185 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 10:13:56,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:13:56 BoogieIcfgContainer [2020-10-28 10:13:56,188 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 10:13:56,189 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 10:13:56,190 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 10:13:56,193 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 10:13:56,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 10:13:52" (1/3) ... [2020-10-28 10:13:56,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e38d5c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:13:56, skipping insertion in model container [2020-10-28 10:13:56,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:13:53" (2/3) ... [2020-10-28 10:13:56,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e38d5c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:13:56, skipping insertion in model container [2020-10-28 10:13:56,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:13:56" (3/3) ... [2020-10-28 10:13:56,197 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label16.c [2020-10-28 10:13:56,209 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 10:13:56,215 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 10:13:56,230 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 10:13:56,261 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 10:13:56,261 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 10:13:56,261 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 10:13:56,262 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 10:13:56,262 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 10:13:56,262 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 10:13:56,262 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 10:13:56,262 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 10:13:56,287 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states. [2020-10-28 10:13:56,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-10-28 10:13:56,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:13:56,305 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:13:56,306 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:13:56,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:13:56,312 INFO L82 PathProgramCache]: Analyzing trace with hash 2143766272, now seen corresponding path program 1 times [2020-10-28 10:13:56,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:13:56,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1168891268] [2020-10-28 10:13:56,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:13:56,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:56,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:57,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:01,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:01,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 182 [2020-10-28 10:14:01,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:14:01,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5058 [2020-10-28 10:14:01,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:01,801 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:01,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:14:01,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:14:01,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 173 [2020-10-28 10:14:01,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 10:14:02,385 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:14:02,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:14:02,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:02,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:02,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:02,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:14:02,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:02,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-28 10:14:02,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:02,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:02,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:14:02,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:02,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:14:02,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:14:02,542 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 10:14:02,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1168891268] [2020-10-28 10:14:02,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:14:02,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 10:14:02,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513782758] [2020-10-28 10:14:02,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 10:14:02,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:14:02,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 10:14:02,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 10:14:02,578 INFO L87 Difference]: Start difference. First operand 315 states. Second operand 4 states. [2020-10-28 10:14:02,922 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:14:06,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:14:06,808 INFO L93 Difference]: Finished difference Result 844 states and 1491 transitions. [2020-10-28 10:14:06,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:14:06,811 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 172 [2020-10-28 10:14:06,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:14:06,843 INFO L225 Difference]: With dead ends: 844 [2020-10-28 10:14:06,843 INFO L226 Difference]: Without dead ends: 465 [2020-10-28 10:14:06,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:14:06,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2020-10-28 10:14:06,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 461. [2020-10-28 10:14:06,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 461 states. [2020-10-28 10:14:06,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 652 transitions. [2020-10-28 10:14:06,938 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 652 transitions. Word has length 172 [2020-10-28 10:14:06,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:14:06,942 INFO L481 AbstractCegarLoop]: Abstraction has 461 states and 652 transitions. [2020-10-28 10:14:06,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 10:14:06,942 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 652 transitions. [2020-10-28 10:14:06,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-10-28 10:14:06,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:14:06,960 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:14:06,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 10:14:06,960 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:14:06,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:14:06,961 INFO L82 PathProgramCache]: Analyzing trace with hash -134349089, now seen corresponding path program 1 times [2020-10-28 10:14:06,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:14:06,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355617142] [2020-10-28 10:14:06,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:14:07,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:07,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:07,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:09,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:09,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 196 [2020-10-28 10:14:09,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:14:09,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2551 [2020-10-28 10:14:09,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:09,581 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:09,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:14:09,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 10:14:09,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 170 [2020-10-28 10:14:09,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 10:14:10,029 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:14:10,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:14:10,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:10,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:10,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:10,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:14:10,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:10,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 10:14:10,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:10,061 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:10,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:14:10,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:10,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:14:10,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-10-28 10:14:10,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:14:10,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:10,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:10,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:10,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 10:14:10,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:10,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 10:14:10,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:10,209 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:10,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:14:10,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:10,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 10:14:10,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:10,284 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:14:10,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355617142] [2020-10-28 10:14:10,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:14:10,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 10:14:10,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617466607] [2020-10-28 10:14:10,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 10:14:10,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:14:10,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 10:14:10,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:14:10,289 INFO L87 Difference]: Start difference. First operand 461 states and 652 transitions. Second operand 5 states. [2020-10-28 10:14:10,667 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:14:13,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:14:13,911 INFO L93 Difference]: Finished difference Result 1352 states and 1930 transitions. [2020-10-28 10:14:13,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:14:13,912 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 184 [2020-10-28 10:14:13,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:14:13,926 INFO L225 Difference]: With dead ends: 1352 [2020-10-28 10:14:13,927 INFO L226 Difference]: Without dead ends: 897 [2020-10-28 10:14:13,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:14:13,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2020-10-28 10:14:14,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 892. [2020-10-28 10:14:14,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 892 states. [2020-10-28 10:14:14,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 1188 transitions. [2020-10-28 10:14:14,012 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 1188 transitions. Word has length 184 [2020-10-28 10:14:14,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:14:14,014 INFO L481 AbstractCegarLoop]: Abstraction has 892 states and 1188 transitions. [2020-10-28 10:14:14,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 10:14:14,014 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 1188 transitions. [2020-10-28 10:14:14,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-10-28 10:14:14,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:14:14,025 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:14:14,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 10:14:14,025 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:14:14,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:14:14,028 INFO L82 PathProgramCache]: Analyzing trace with hash 24552841, now seen corresponding path program 1 times [2020-10-28 10:14:14,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:14:14,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1161242438] [2020-10-28 10:14:14,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:14:14,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:14,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:14,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:15,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:17,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:19,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:19,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 208 [2020-10-28 10:14:19,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 10:14:19,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-28 10:14:19,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:19,114 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:19,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:14:19,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 10:14:19,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 172 [2020-10-28 10:14:19,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:19,632 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:14:19,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:14:19,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:19,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:19,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:19,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:14:19,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:19,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 10:14:19,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:19,663 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:19,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:14:19,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:19,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:14:19,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:14:19,790 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-28 10:14:19,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:14:19,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:19,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:19,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:19,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 10:14:19,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:19,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 10:14:19,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:19,807 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:19,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:14:19,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:19,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:14:19,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:14:19,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 10:14:19,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:19,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:19,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:19,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-28 10:14:19,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:19,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 10:14:19,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:19,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:19,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:14:19,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:19,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 10:14:19,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:20,007 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-28 10:14:20,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1161242438] [2020-10-28 10:14:20,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:14:20,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 10:14:20,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936596301] [2020-10-28 10:14:20,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 10:14:20,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:14:20,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 10:14:20,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:14:20,016 INFO L87 Difference]: Start difference. First operand 892 states and 1188 transitions. Second operand 6 states. [2020-10-28 10:14:20,251 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:14:20,619 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:14:24,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:14:24,861 INFO L93 Difference]: Finished difference Result 2204 states and 3045 transitions. [2020-10-28 10:14:24,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 10:14:24,862 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 194 [2020-10-28 10:14:24,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:14:24,871 INFO L225 Difference]: With dead ends: 2204 [2020-10-28 10:14:24,872 INFO L226 Difference]: Without dead ends: 1318 [2020-10-28 10:14:24,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 10:14:24,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2020-10-28 10:14:24,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 1311. [2020-10-28 10:14:24,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1311 states. [2020-10-28 10:14:24,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1311 states to 1311 states and 1791 transitions. [2020-10-28 10:14:24,931 INFO L78 Accepts]: Start accepts. Automaton has 1311 states and 1791 transitions. Word has length 194 [2020-10-28 10:14:24,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:14:24,932 INFO L481 AbstractCegarLoop]: Abstraction has 1311 states and 1791 transitions. [2020-10-28 10:14:24,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 10:14:24,933 INFO L276 IsEmpty]: Start isEmpty. Operand 1311 states and 1791 transitions. [2020-10-28 10:14:24,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-10-28 10:14:24,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:14:24,939 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:14:24,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 10:14:24,939 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:14:24,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:14:24,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1660838458, now seen corresponding path program 1 times [2020-10-28 10:14:24,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:14:24,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1234978353] [2020-10-28 10:14:24,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:14:24,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:25,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:25,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:27,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:29,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:29,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 212 [2020-10-28 10:14:29,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:14:29,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 10:14:29,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:29,991 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:29,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:14:29,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-28 10:14:29,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 170 [2020-10-28 10:14:29,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:30,374 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:14:30,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:14:30,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:30,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:30,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:30,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:14:30,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:30,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 10:14:30,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:30,392 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:30,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:14:30,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:30,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:14:30,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:30,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:14:30,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:30,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:30,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:30,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 10:14:30,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:30,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 10:14:30,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:30,582 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:30,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:14:30,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:30,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:14:30,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:30,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 10:14:30,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:30,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:30,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:30,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-28 10:14:30,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:30,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-28 10:14:30,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:30,642 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:30,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:14:30,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:30,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 10:14:30,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:30,730 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 10:14:30,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1234978353] [2020-10-28 10:14:30,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:14:30,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 10:14:30,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336427291] [2020-10-28 10:14:30,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 10:14:30,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:14:30,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 10:14:30,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:14:30,733 INFO L87 Difference]: Start difference. First operand 1311 states and 1791 transitions. Second operand 5 states. [2020-10-28 10:14:30,981 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-28 10:14:34,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:14:34,193 INFO L93 Difference]: Finished difference Result 3885 states and 5402 transitions. [2020-10-28 10:14:34,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:14:34,199 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 198 [2020-10-28 10:14:34,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:14:34,216 INFO L225 Difference]: With dead ends: 3885 [2020-10-28 10:14:34,216 INFO L226 Difference]: Without dead ends: 2580 [2020-10-28 10:14:34,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:14:34,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2580 states. [2020-10-28 10:14:34,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2580 to 2571. [2020-10-28 10:14:34,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2571 states. [2020-10-28 10:14:34,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2571 states to 2571 states and 3431 transitions. [2020-10-28 10:14:34,334 INFO L78 Accepts]: Start accepts. Automaton has 2571 states and 3431 transitions. Word has length 198 [2020-10-28 10:14:34,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:14:34,334 INFO L481 AbstractCegarLoop]: Abstraction has 2571 states and 3431 transitions. [2020-10-28 10:14:34,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 10:14:34,335 INFO L276 IsEmpty]: Start isEmpty. Operand 2571 states and 3431 transitions. [2020-10-28 10:14:34,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-10-28 10:14:34,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:14:34,345 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:14:34,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 10:14:34,346 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:14:34,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:14:34,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1198458992, now seen corresponding path program 1 times [2020-10-28 10:14:34,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:14:34,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674049425] [2020-10-28 10:14:34,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:14:34,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:34,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:35,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:36,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:37,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:37,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 216 [2020-10-28 10:14:37,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:14:37,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2619 [2020-10-28 10:14:37,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:37,038 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:37,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:14:37,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-28 10:14:37,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 170 [2020-10-28 10:14:37,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:37,369 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:14:37,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:14:37,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:37,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:37,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:37,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:14:37,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:37,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 10:14:37,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:37,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:37,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:14:37,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:37,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:14:37,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:37,504 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-28 10:14:37,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:14:37,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:37,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:37,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:37,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 10:14:37,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:37,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-10-28 10:14:37,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:37,610 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:37,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:14:37,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:37,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 10:14:37,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:14:37,761 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 28 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:14:37,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674049425] [2020-10-28 10:14:37,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:14:37,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 10:14:37,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087044012] [2020-10-28 10:14:37,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 10:14:37,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:14:37,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 10:14:37,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:14:37,764 INFO L87 Difference]: Start difference. First operand 2571 states and 3431 transitions. Second operand 5 states. [2020-10-28 10:14:38,199 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:14:41,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:14:41,457 INFO L93 Difference]: Finished difference Result 7671 states and 10452 transitions. [2020-10-28 10:14:41,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:14:41,459 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 204 [2020-10-28 10:14:41,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:14:41,494 INFO L225 Difference]: With dead ends: 7671 [2020-10-28 10:14:41,495 INFO L226 Difference]: Without dead ends: 5106 [2020-10-28 10:14:41,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:14:41,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5106 states. [2020-10-28 10:14:41,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5106 to 5083. [2020-10-28 10:14:41,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5083 states. [2020-10-28 10:14:41,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5083 states to 5083 states and 6824 transitions. [2020-10-28 10:14:41,682 INFO L78 Accepts]: Start accepts. Automaton has 5083 states and 6824 transitions. Word has length 204 [2020-10-28 10:14:41,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:14:41,682 INFO L481 AbstractCegarLoop]: Abstraction has 5083 states and 6824 transitions. [2020-10-28 10:14:41,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 10:14:41,682 INFO L276 IsEmpty]: Start isEmpty. Operand 5083 states and 6824 transitions. [2020-10-28 10:14:41,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-10-28 10:14:41,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:14:41,698 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:14:41,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 10:14:41,699 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:14:41,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:14:41,699 INFO L82 PathProgramCache]: Analyzing trace with hash 911933095, now seen corresponding path program 1 times [2020-10-28 10:14:41,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:14:41,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574321393] [2020-10-28 10:14:41,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:14:41,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:41,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:41,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:41,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:46,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:46,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 231 [2020-10-28 10:14:46,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:14:46,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 10:14:46,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:46,740 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:46,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:14:46,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-28 10:14:46,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 10:14:46,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:46,998 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:14:46,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:14:47,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:47,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:47,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:47,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:14:47,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:47,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 10:14:47,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:47,013 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:47,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:14:47,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:47,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:14:47,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:47,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:14:47,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:47,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:47,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:47,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 10:14:47,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:47,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 10:14:47,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:47,152 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:47,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:14:47,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:47,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:14:47,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:47,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 10:14:47,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:47,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:47,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:47,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-28 10:14:47,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:47,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-28 10:14:47,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:47,204 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:47,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:14:47,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:47,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 10:14:47,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:47,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-28 10:14:47,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:47,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:47,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:47,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-28 10:14:47,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:47,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-28 10:14:47,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:47,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:47,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:14:47,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:14:47,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 10:14:47,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:47,389 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 59 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-28 10:14:47,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574321393] [2020-10-28 10:14:47,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:14:47,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:14:47,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190670310] [2020-10-28 10:14:47,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:14:47,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:14:47,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:14:47,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:14:47,393 INFO L87 Difference]: Start difference. First operand 5083 states and 6824 transitions. Second operand 7 states. [2020-10-28 10:14:47,712 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:14:48,122 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:14:51,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:14:51,928 INFO L93 Difference]: Finished difference Result 13451 states and 18869 transitions. [2020-10-28 10:14:51,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 10:14:51,929 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 215 [2020-10-28 10:14:51,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:14:51,993 INFO L225 Difference]: With dead ends: 13451 [2020-10-28 10:14:51,993 INFO L226 Difference]: Without dead ends: 8374 [2020-10-28 10:14:52,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-28 10:14:52,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8374 states. [2020-10-28 10:14:52,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8374 to 8317. [2020-10-28 10:14:52,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8317 states. [2020-10-28 10:14:52,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8317 states to 8317 states and 10955 transitions. [2020-10-28 10:14:52,390 INFO L78 Accepts]: Start accepts. Automaton has 8317 states and 10955 transitions. Word has length 215 [2020-10-28 10:14:52,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:14:52,390 INFO L481 AbstractCegarLoop]: Abstraction has 8317 states and 10955 transitions. [2020-10-28 10:14:52,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:14:52,390 INFO L276 IsEmpty]: Start isEmpty. Operand 8317 states and 10955 transitions. [2020-10-28 10:14:52,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-10-28 10:14:52,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:14:52,418 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:14:52,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 10:14:52,418 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:14:52,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:14:52,419 INFO L82 PathProgramCache]: Analyzing trace with hash 126904366, now seen corresponding path program 1 times [2020-10-28 10:14:52,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:14:52,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [66969049] [2020-10-28 10:14:52,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:14:52,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:52,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:52,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:54,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:54,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:57,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:57,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 251 [2020-10-28 10:14:57,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 10:14:57,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5052 [2020-10-28 10:14:57,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:57,516 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:57,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:14:57,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 10:14:57,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 206 [2020-10-28 10:14:57,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:57,941 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:14:57,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:14:57,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:57,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:57,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:57,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:14:57,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:57,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 10:14:57,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:57,963 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:57,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:14:57,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:57,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:14:57,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:58,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:14:58,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:58,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:58,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:58,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 10:14:58,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:58,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 10:14:58,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:58,072 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:58,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:14:58,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:58,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:14:58,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:58,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 10:14:58,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:58,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:58,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:58,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-28 10:14:58,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:58,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-28 10:14:58,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:58,120 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:58,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:14:58,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:58,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 10:14:58,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:58,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-28 10:14:58,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:58,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:58,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:58,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 10:14:58,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:58,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-28 10:14:58,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:58,220 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:58,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:14:58,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:14:58,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 10:14:58,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:58,337 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 48 proven. 32 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-28 10:14:58,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [66969049] [2020-10-28 10:14:58,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:14:58,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 10:14:58,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397678799] [2020-10-28 10:14:58,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 10:14:58,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:14:58,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 10:14:58,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:14:58,339 INFO L87 Difference]: Start difference. First operand 8317 states and 10955 transitions. Second operand 6 states. [2020-10-28 10:14:58,913 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:15:02,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:15:02,880 INFO L93 Difference]: Finished difference Result 23331 states and 32231 transitions. [2020-10-28 10:15:02,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 10:15:02,881 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 235 [2020-10-28 10:15:02,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:15:02,997 INFO L225 Difference]: With dead ends: 23331 [2020-10-28 10:15:02,997 INFO L226 Difference]: Without dead ends: 15020 [2020-10-28 10:15:03,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 10:15:03,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15020 states. [2020-10-28 10:15:03,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15020 to 14850. [2020-10-28 10:15:03,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14850 states. [2020-10-28 10:15:03,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14850 states to 14850 states and 19973 transitions. [2020-10-28 10:15:03,560 INFO L78 Accepts]: Start accepts. Automaton has 14850 states and 19973 transitions. Word has length 235 [2020-10-28 10:15:03,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:15:03,561 INFO L481 AbstractCegarLoop]: Abstraction has 14850 states and 19973 transitions. [2020-10-28 10:15:03,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 10:15:03,561 INFO L276 IsEmpty]: Start isEmpty. Operand 14850 states and 19973 transitions. [2020-10-28 10:15:03,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-10-28 10:15:03,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:15:03,616 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:15:03,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 10:15:03,617 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:15:03,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:15:03,617 INFO L82 PathProgramCache]: Analyzing trace with hash -157295569, now seen corresponding path program 1 times [2020-10-28 10:15:03,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:15:03,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1593265800] [2020-10-28 10:15:03,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:15:03,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:03,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:03,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:06,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:06,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:07,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:08,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:08,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 272 [2020-10-28 10:15:08,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 10:15:08,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-28 10:15:08,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:08,706 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:08,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:15:08,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 62 [2020-10-28 10:15:08,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 206 [2020-10-28 10:15:08,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:09,094 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:15:09,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:15:09,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:09,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:09,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:09,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:15:09,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:09,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 10:15:09,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:09,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:09,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:15:09,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:15:09,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:15:09,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:09,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:15:09,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:09,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:09,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:09,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 10:15:09,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:09,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 10:15:09,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:09,243 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:09,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:15:09,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:15:09,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:15:09,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:09,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 10:15:09,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:09,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:09,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:09,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 10:15:09,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:09,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-28 10:15:09,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:09,309 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:09,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:15:09,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:15:09,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 10:15:09,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:09,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-28 10:15:09,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:09,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:09,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:09,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 10:15:09,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:09,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-28 10:15:09,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:09,458 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:09,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:15:09,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:15:09,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 10:15:09,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:09,606 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 86 proven. 32 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-28 10:15:09,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1593265800] [2020-10-28 10:15:09,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:15:09,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 10:15:09,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469072229] [2020-10-28 10:15:09,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 10:15:09,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:15:09,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 10:15:09,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:15:09,609 INFO L87 Difference]: Start difference. First operand 14850 states and 19973 transitions. Second operand 6 states. [2020-10-28 10:15:09,871 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 10:15:13,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:15:13,377 INFO L93 Difference]: Finished difference Result 41015 states and 57383 transitions. [2020-10-28 10:15:13,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 10:15:13,377 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 256 [2020-10-28 10:15:13,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:15:13,519 INFO L225 Difference]: With dead ends: 41015 [2020-10-28 10:15:13,519 INFO L226 Difference]: Without dead ends: 26171 [2020-10-28 10:15:13,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 10:15:13,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26171 states. [2020-10-28 10:15:14,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26171 to 25190. [2020-10-28 10:15:14,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25190 states. [2020-10-28 10:15:14,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25190 states to 25190 states and 33617 transitions. [2020-10-28 10:15:14,458 INFO L78 Accepts]: Start accepts. Automaton has 25190 states and 33617 transitions. Word has length 256 [2020-10-28 10:15:14,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:15:14,459 INFO L481 AbstractCegarLoop]: Abstraction has 25190 states and 33617 transitions. [2020-10-28 10:15:14,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 10:15:14,459 INFO L276 IsEmpty]: Start isEmpty. Operand 25190 states and 33617 transitions. [2020-10-28 10:15:14,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2020-10-28 10:15:14,552 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:15:14,553 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:15:14,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 10:15:14,553 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:15:14,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:15:14,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1065339383, now seen corresponding path program 1 times [2020-10-28 10:15:14,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:15:14,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2844767] [2020-10-28 10:15:14,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:15:14,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:14,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:14,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:15,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:16,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:19,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:19,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 313 [2020-10-28 10:15:19,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 10:15:19,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5117 [2020-10-28 10:15:19,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:19,722 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:19,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:15:19,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-28 10:15:19,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-28 10:15:19,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:20,030 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:15:20,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:15:20,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:20,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:20,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:20,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:15:20,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:20,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 10:15:20,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:20,046 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:20,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:15:20,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:15:20,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:15:20,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:20,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:15:20,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:20,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:20,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:20,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 10:15:20,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:20,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 10:15:20,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:20,173 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:20,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:15:20,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:15:20,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:15:20,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:20,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 10:15:20,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:20,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:20,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:20,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-28 10:15:20,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:20,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-28 10:15:20,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:20,234 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:20,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:15:20,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:15:20,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 10:15:20,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:20,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-28 10:15:20,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:20,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:20,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:20,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 10:15:20,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:20,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-10-28 10:15:20,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:20,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:20,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:15:20,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:15:20,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 10:15:20,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:20,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-28 10:15:20,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:20,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:20,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:20,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 10:15:20,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:20,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 152 [2020-10-28 10:15:20,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:20,583 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:20,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:15:20,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:15:20,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-28 10:15:20,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:20,743 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 158 proven. 6 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-10-28 10:15:20,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2844767] [2020-10-28 10:15:20,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:15:20,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:15:20,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887618637] [2020-10-28 10:15:20,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:15:20,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:15:20,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:15:20,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:15:20,745 INFO L87 Difference]: Start difference. First operand 25190 states and 33617 transitions. Second operand 7 states. [2020-10-28 10:15:21,289 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 10:15:21,662 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:15:29,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:15:29,180 INFO L93 Difference]: Finished difference Result 99774 states and 149766 transitions. [2020-10-28 10:15:29,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 10:15:29,181 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 295 [2020-10-28 10:15:29,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:15:29,869 INFO L225 Difference]: With dead ends: 99774 [2020-10-28 10:15:29,870 INFO L226 Difference]: Without dead ends: 74590 [2020-10-28 10:15:29,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 10:15:30,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74590 states. [2020-10-28 10:15:33,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74590 to 72165. [2020-10-28 10:15:33,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72165 states. [2020-10-28 10:15:33,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72165 states to 72165 states and 99319 transitions. [2020-10-28 10:15:33,350 INFO L78 Accepts]: Start accepts. Automaton has 72165 states and 99319 transitions. Word has length 295 [2020-10-28 10:15:33,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:15:33,350 INFO L481 AbstractCegarLoop]: Abstraction has 72165 states and 99319 transitions. [2020-10-28 10:15:33,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:15:33,351 INFO L276 IsEmpty]: Start isEmpty. Operand 72165 states and 99319 transitions. [2020-10-28 10:15:33,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2020-10-28 10:15:33,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:15:33,807 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:15:33,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 10:15:33,807 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:15:33,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:15:33,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1125174387, now seen corresponding path program 1 times [2020-10-28 10:15:33,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:15:33,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1880132391] [2020-10-28 10:15:33,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:15:33,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:33,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:33,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:34,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:34,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:35,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:38,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:38,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:38,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 315 [2020-10-28 10:15:38,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 10:15:38,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 10:15:38,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:38,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:38,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:15:38,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-28 10:15:38,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-28 10:15:38,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:39,162 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:15:39,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:15:39,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:39,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:39,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:39,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:15:39,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:39,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 10:15:39,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:39,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:39,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:15:39,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:15:39,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:15:39,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:39,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:15:39,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:39,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:39,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:39,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 10:15:39,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:39,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 10:15:39,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:39,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:39,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:15:39,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:15:39,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:15:39,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:39,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 10:15:39,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:39,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:39,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:39,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-28 10:15:39,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:39,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-28 10:15:39,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:39,340 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:39,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:15:39,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:15:39,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 10:15:39,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:39,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-28 10:15:39,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:39,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:39,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:39,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 10:15:39,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:39,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-28 10:15:39,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:39,460 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:39,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:15:39,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:15:39,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 10:15:39,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:39,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-10-28 10:15:39,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:39,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:39,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:39,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 10:15:39,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:39,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 185 [2020-10-28 10:15:39,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:39,718 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:39,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:15:39,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:15:39,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-28 10:15:39,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:39,830 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 164 proven. 6 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-10-28 10:15:39,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1880132391] [2020-10-28 10:15:39,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:15:39,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:15:39,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537269466] [2020-10-28 10:15:39,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:15:39,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:15:39,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:15:39,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:15:39,833 INFO L87 Difference]: Start difference. First operand 72165 states and 99319 transitions. Second operand 7 states. [2020-10-28 10:15:40,208 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:15:40,872 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:15:51,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:15:51,659 INFO L93 Difference]: Finished difference Result 284672 states and 449084 transitions. [2020-10-28 10:15:51,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 10:15:51,661 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 297 [2020-10-28 10:15:51,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:15:53,736 INFO L225 Difference]: With dead ends: 284672 [2020-10-28 10:15:53,736 INFO L226 Difference]: Without dead ends: 212513 [2020-10-28 10:15:54,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 10:15:54,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212513 states. [2020-10-28 10:16:02,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212513 to 206338. [2020-10-28 10:16:02,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206338 states. [2020-10-28 10:16:03,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206338 states to 206338 states and 297049 transitions. [2020-10-28 10:16:03,932 INFO L78 Accepts]: Start accepts. Automaton has 206338 states and 297049 transitions. Word has length 297 [2020-10-28 10:16:03,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:16:03,932 INFO L481 AbstractCegarLoop]: Abstraction has 206338 states and 297049 transitions. [2020-10-28 10:16:03,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:16:03,933 INFO L276 IsEmpty]: Start isEmpty. Operand 206338 states and 297049 transitions. [2020-10-28 10:16:04,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2020-10-28 10:16:04,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:16:04,927 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:16:04,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 10:16:04,927 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:16:04,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:16:04,928 INFO L82 PathProgramCache]: Analyzing trace with hash 165820933, now seen corresponding path program 1 times [2020-10-28 10:16:04,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:16:04,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066428586] [2020-10-28 10:16:04,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:16:04,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:04,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:05,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:05,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:05,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:09,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:09,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:10,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:10,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 318 [2020-10-28 10:16:10,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 10:16:10,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5069 [2020-10-28 10:16:10,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:10,045 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:10,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:16:10,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 10:16:10,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-28 10:16:10,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:10,390 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:16:10,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:16:10,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:10,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:10,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:10,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:16:10,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:10,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 10:16:10,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:10,405 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:10,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:16:10,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:16:10,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:16:10,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:10,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:16:10,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:10,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:10,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:10,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 10:16:10,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:10,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 10:16:10,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:10,525 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:10,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:16:10,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:16:10,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:16:10,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:10,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 10:16:10,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:10,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:10,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:10,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-28 10:16:10,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:10,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-28 10:16:10,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:10,567 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:10,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:16:10,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:16:10,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 10:16:10,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:10,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-28 10:16:10,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:10,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:10,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:10,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 10:16:10,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:10,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-28 10:16:10,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:10,688 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:10,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:16:10,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:16:10,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 10:16:10,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:10,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-28 10:16:10,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:10,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:10,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:10,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 10:16:10,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:10,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-10-28 10:16:10,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:10,899 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:10,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:16:10,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:16:10,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-28 10:16:10,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:11,070 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 169 proven. 10 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-10-28 10:16:11,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066428586] [2020-10-28 10:16:11,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:16:11,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 10:16:11,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591619953] [2020-10-28 10:16:11,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 10:16:11,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:16:11,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 10:16:11,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 10:16:11,072 INFO L87 Difference]: Start difference. First operand 206338 states and 297049 transitions. Second operand 8 states. [2020-10-28 10:16:11,523 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 10:16:12,191 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:16:13,933 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-28 10:16:28,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:16:28,220 INFO L93 Difference]: Finished difference Result 437922 states and 688783 transitions. [2020-10-28 10:16:28,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 10:16:28,221 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 300 [2020-10-28 10:16:28,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:16:30,521 INFO L225 Difference]: With dead ends: 437922 [2020-10-28 10:16:30,521 INFO L226 Difference]: Without dead ends: 231590 [2020-10-28 10:16:31,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-28 10:16:31,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231590 states. [2020-10-28 10:16:39,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231590 to 222928. [2020-10-28 10:16:39,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222928 states. [2020-10-28 10:16:41,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222928 states to 222928 states and 316090 transitions. [2020-10-28 10:16:41,261 INFO L78 Accepts]: Start accepts. Automaton has 222928 states and 316090 transitions. Word has length 300 [2020-10-28 10:16:41,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:16:41,262 INFO L481 AbstractCegarLoop]: Abstraction has 222928 states and 316090 transitions. [2020-10-28 10:16:41,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 10:16:41,262 INFO L276 IsEmpty]: Start isEmpty. Operand 222928 states and 316090 transitions. [2020-10-28 10:16:41,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2020-10-28 10:16:41,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:16:41,837 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:16:41,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 10:16:41,838 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:16:41,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:16:41,838 INFO L82 PathProgramCache]: Analyzing trace with hash -465363769, now seen corresponding path program 1 times [2020-10-28 10:16:41,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:16:41,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [571359520] [2020-10-28 10:16:41,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:16:41,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:42,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:42,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:44,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:46,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:46,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 315 [2020-10-28 10:16:46,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:16:46,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4710 [2020-10-28 10:16:46,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:46,591 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:46,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:16:46,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-28 10:16:46,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-28 10:16:46,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:46,898 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:16:46,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:16:46,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:46,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:46,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:46,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:16:46,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:46,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 10:16:46,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:46,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:46,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:16:46,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:16:46,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:16:46,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:47,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:16:47,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:47,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:47,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:47,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 10:16:47,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:47,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-28 10:16:47,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:47,078 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:47,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:16:47,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:16:47,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 10:16:47,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:47,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-28 10:16:47,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:47,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:47,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:47,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-28 10:16:47,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:47,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 237 [2020-10-28 10:16:47,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:47,358 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:47,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:16:47,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:16:47,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-28 10:16:47,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:47,779 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 152 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 10:16:47,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [571359520] [2020-10-28 10:16:47,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:16:47,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:16:47,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810073692] [2020-10-28 10:16:47,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:16:47,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:16:47,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:16:47,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:16:47,781 INFO L87 Difference]: Start difference. First operand 222928 states and 316090 transitions. Second operand 7 states. [2020-10-28 10:16:48,221 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 10:16:49,637 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-28 10:16:59,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:16:59,797 INFO L93 Difference]: Finished difference Result 445811 states and 696593 transitions. [2020-10-28 10:16:59,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 10:16:59,798 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 301 [2020-10-28 10:16:59,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted.