/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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/loops-crafted-1/Mono1_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:50:31,716 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:50:31,719 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:50:31,762 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:50:31,763 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:50:31,769 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:50:31,772 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:50:31,776 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:50:31,780 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:50:31,788 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:50:31,790 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:50:31,791 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:50:31,791 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:50:31,796 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:50:31,799 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:50:31,802 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:50:31,803 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:50:31,807 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:50:31,814 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:50:31,818 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:50:31,821 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:50:31,823 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:50:31,825 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:50:31,827 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:50:31,840 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:50:31,840 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:50:31,841 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:50:31,842 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:50:31,845 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:50:31,847 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:50:31,847 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:50:31,847 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:50:31,851 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:50:31,853 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:50:31,854 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:50:31,854 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:50:31,855 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:50:31,855 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:50:31,855 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:50:31,856 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:50:31,857 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:50:31,862 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 [2020-10-29 09:50:31,913 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:50:31,914 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:50:31,918 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:50:31,918 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:50:31,918 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:50:31,918 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:50:31,919 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:50:31,919 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:50:31,919 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:50:31,919 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:50:31,920 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:50:31,921 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:50:31,921 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:50:31,921 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:50:31,921 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:50:31,921 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:50:31,922 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:50:31,922 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:50:31,922 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:50:31,922 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:50:31,923 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:50:31,923 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:50:31,923 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:50:31,923 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:50:31,923 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:50:31,924 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:50:31,924 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:50:31,924 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:50:31,924 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:50:31,924 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:50:32,373 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:50:32,422 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:50:32,425 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:50:32,427 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:50:32,427 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:50:32,428 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/Mono1_1-2.c [2020-10-29 09:50:32,522 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/355dcdd26/ae6d4741f58647a4a4ca283d9cbe4c21/FLAG5109cd2cb [2020-10-29 09:50:33,162 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:50:33,163 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/Mono1_1-2.c [2020-10-29 09:50:33,170 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/355dcdd26/ae6d4741f58647a4a4ca283d9cbe4c21/FLAG5109cd2cb [2020-10-29 09:50:33,547 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/355dcdd26/ae6d4741f58647a4a4ca283d9cbe4c21 [2020-10-29 09:50:33,550 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:50:33,557 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:50:33,559 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:50:33,559 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:50:33,563 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:50:33,564 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:50:33" (1/1) ... [2020-10-29 09:50:33,567 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bff44d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:50:33, skipping insertion in model container [2020-10-29 09:50:33,567 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:50:33" (1/1) ... [2020-10-29 09:50:33,576 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:50:33,590 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:50:33,754 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:50:33,764 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:50:33,781 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:50:33,797 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:50:33,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:50:33 WrapperNode [2020-10-29 09:50:33,798 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:50:33,799 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:50:33,799 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:50:33,799 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:50:33,812 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:50:33" (1/1) ... [2020-10-29 09:50:33,812 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:50:33" (1/1) ... [2020-10-29 09:50:33,820 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:50:33" (1/1) ... [2020-10-29 09:50:33,820 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:50:33" (1/1) ... [2020-10-29 09:50:33,826 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:50:33" (1/1) ... [2020-10-29 09:50:33,830 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:50:33" (1/1) ... [2020-10-29 09:50:33,831 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:50:33" (1/1) ... [2020-10-29 09:50:33,833 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:50:33,834 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:50:33,834 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:50:33,834 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:50:33,835 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:50:33" (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 [2020-10-29 09:50:33,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:50:33,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:50:33,905 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:50:33,905 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 09:50:33,906 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:50:33,906 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:50:33,906 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:50:33,906 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:50:33,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:50:33,906 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 09:50:33,907 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:50:33,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:50:33,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:50:33,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:50:33,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:50:33,907 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:50:33,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:50:34,132 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:50:34,133 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-29 09:50:34,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:50:34 BoogieIcfgContainer [2020-10-29 09:50:34,135 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:50:34,137 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:50:34,137 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:50:34,141 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:50:34,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:50:33" (1/3) ... [2020-10-29 09:50:34,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59e64b5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:50:34, skipping insertion in model container [2020-10-29 09:50:34,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:50:33" (2/3) ... [2020-10-29 09:50:34,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59e64b5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:50:34, skipping insertion in model container [2020-10-29 09:50:34,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:50:34" (3/3) ... [2020-10-29 09:50:34,145 INFO L111 eAbstractionObserver]: Analyzing ICFG Mono1_1-2.c [2020-10-29 09:50:34,159 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:50:34,164 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:50:34,181 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:50:34,214 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:50:34,215 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:50:34,215 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:50:34,215 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:50:34,215 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:50:34,216 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:50:34,216 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:50:34,216 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:50:34,235 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-10-29 09:50:34,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-29 09:50:34,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:34,242 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:34,243 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:34,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:34,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1347720711, now seen corresponding path program 1 times [2020-10-29 09:50:34,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:34,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [984756088] [2020-10-29 09:50:34,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:34,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:34,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:34,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:34,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-29 09:50:34,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:34,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-10-29 09:50:34,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:34,582 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:34,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:34,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:50:34,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:34,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 09:50:34,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:34,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:34,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:34,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:34,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:34,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:34,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 09:50:34,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:34,805 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:34,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:34,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:34,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:34,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:50:34,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:34,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [984756088] [2020-10-29 09:50:34,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:50:34,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-29 09:50:34,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257747083] [2020-10-29 09:50:34,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-29 09:50:34,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:34,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-29 09:50:34,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-29 09:50:34,854 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2020-10-29 09:50:34,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:34,925 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2020-10-29 09:50:34,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-29 09:50:34,927 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-29 09:50:34,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:34,936 INFO L225 Difference]: With dead ends: 35 [2020-10-29 09:50:34,936 INFO L226 Difference]: Without dead ends: 14 [2020-10-29 09:50:34,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-29 09:50:34,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-29 09:50:34,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-29 09:50:34,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-29 09:50:34,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-10-29 09:50:34,985 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2020-10-29 09:50:34,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:34,986 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-10-29 09:50:34,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-29 09:50:34,986 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-10-29 09:50:34,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-29 09:50:34,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:34,987 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:34,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:50:34,988 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:34,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:34,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1061429201, now seen corresponding path program 1 times [2020-10-29 09:50:34,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:34,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1495790403] [2020-10-29 09:50:34,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:35,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:35,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:35,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:35,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-29 09:50:35,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:35,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-10-29 09:50:35,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:35,144 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:35,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:50:35,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:35,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 09:50:35,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:35,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:35,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:35,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:35,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:35,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:35,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:35,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 09:50:35,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:35,244 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:35,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:35,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:35,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:35,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:50:35,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:35,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1495790403] [2020-10-29 09:50:35,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:50:35,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:50:35,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351875171] [2020-10-29 09:50:35,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:50:35,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:35,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:50:35,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:50:35,256 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 4 states. [2020-10-29 09:50:35,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:35,340 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2020-10-29 09:50:35,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:50:35,341 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-29 09:50:35,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:35,342 INFO L225 Difference]: With dead ends: 24 [2020-10-29 09:50:35,342 INFO L226 Difference]: Without dead ends: 16 [2020-10-29 09:50:35,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:50:35,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-29 09:50:35,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-29 09:50:35,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-29 09:50:35,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-10-29 09:50:35,351 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2020-10-29 09:50:35,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:35,351 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-10-29 09:50:35,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:50:35,352 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-10-29 09:50:35,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-29 09:50:35,352 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:35,353 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:35,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:50:35,353 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:35,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:35,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1101414388, now seen corresponding path program 1 times [2020-10-29 09:50:35,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:35,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [4052612] [2020-10-29 09:50:35,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:35,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:35,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:35,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:35,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-29 09:50:35,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:35,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-29 09:50:35,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:35,447 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:35,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:50:35,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:50:35,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 09:50:35,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:50:35,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:35,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:35,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:35,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:35,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:35,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:35,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 09:50:35,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:35,521 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:35,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:35,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:35,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:35,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:50:35,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:35,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [4052612] [2020-10-29 09:50:35,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:50:35,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:50:35,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312164284] [2020-10-29 09:50:35,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:50:35,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:35,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:50:35,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:50:35,532 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 4 states. [2020-10-29 09:50:35,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:35,617 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-10-29 09:50:35,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:50:35,618 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-29 09:50:35,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:35,619 INFO L225 Difference]: With dead ends: 24 [2020-10-29 09:50:35,619 INFO L226 Difference]: Without dead ends: 18 [2020-10-29 09:50:35,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:50:35,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-29 09:50:35,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-10-29 09:50:35,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-29 09:50:35,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-10-29 09:50:35,628 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2020-10-29 09:50:35,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:35,629 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-10-29 09:50:35,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:50:35,629 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-10-29 09:50:35,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-29 09:50:35,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:35,630 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:35,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:50:35,631 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:35,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:35,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1647486503, now seen corresponding path program 1 times [2020-10-29 09:50:35,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:35,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518340159] [2020-10-29 09:50:35,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:35,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:35,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:35,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:35,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:35,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-29 09:50:35,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:50:35,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 239 [2020-10-29 09:50:35,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:35,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:35,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 09:50:35,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:35,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-29 09:50:35,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 09:50:35,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:35,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:35,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:35,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:35,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:35,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:35,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:50:35,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:35,988 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:35,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:35,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:35,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:35,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:50:35,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:35,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518340159] [2020-10-29 09:50:35,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:35,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 09:50:35,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254328026] [2020-10-29 09:50:35,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 09:50:35,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:35,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 09:50:35,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:50:35,999 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 5 states. [2020-10-29 09:50:36,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:36,124 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2020-10-29 09:50:36,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 09:50:36,125 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-29 09:50:36,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:36,125 INFO L225 Difference]: With dead ends: 28 [2020-10-29 09:50:36,126 INFO L226 Difference]: Without dead ends: 19 [2020-10-29 09:50:36,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:50:36,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-29 09:50:36,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-29 09:50:36,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-29 09:50:36,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-10-29 09:50:36,133 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2020-10-29 09:50:36,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:36,133 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-10-29 09:50:36,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 09:50:36,133 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-10-29 09:50:36,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-29 09:50:36,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:36,134 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:36,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 09:50:36,135 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:36,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:36,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1678553212, now seen corresponding path program 2 times [2020-10-29 09:50:36,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:36,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235631616] [2020-10-29 09:50:36,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:36,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:36,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:36,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:36,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:36,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-29 09:50:36,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:50:36,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 204 [2020-10-29 09:50:36,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:36,355 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:36,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:50:36,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:36,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 09:50:36,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:36,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:36,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:36,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:36,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:36,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:36,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:36,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:50:36,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:36,449 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:36,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:36,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:36,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:36,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:36,455 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:36,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [235631616] [2020-10-29 09:50:36,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:36,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 09:50:36,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776222068] [2020-10-29 09:50:36,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:50:36,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:36,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:50:36,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:50:36,457 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 6 states. [2020-10-29 09:50:36,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:36,630 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-10-29 09:50:36,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:50:36,630 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-29 09:50:36,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:36,631 INFO L225 Difference]: With dead ends: 30 [2020-10-29 09:50:36,631 INFO L226 Difference]: Without dead ends: 21 [2020-10-29 09:50:36,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:50:36,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-29 09:50:36,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-29 09:50:36,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-29 09:50:36,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-29 09:50:36,639 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2020-10-29 09:50:36,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:36,639 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-29 09:50:36,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:50:36,639 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-29 09:50:36,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-29 09:50:36,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:36,640 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:36,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 09:50:36,641 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:36,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:36,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1747916193, now seen corresponding path program 3 times [2020-10-29 09:50:36,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:36,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1070524596] [2020-10-29 09:50:36,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:36,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:36,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:36,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:36,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:36,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-29 09:50:36,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:50:36,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 248 [2020-10-29 09:50:36,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:36,903 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:36,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:50:36,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:36,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-29 09:50:36,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:37,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:37,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:37,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:37,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:37,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:37,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:37,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:50:37,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:37,011 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:37,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:37,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:37,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:37,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:50:37,016 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:37,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1070524596] [2020-10-29 09:50:37,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:37,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 09:50:37,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347239965] [2020-10-29 09:50:37,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:50:37,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:37,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:50:37,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:50:37,019 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-10-29 09:50:37,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:37,213 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-10-29 09:50:37,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:50:37,213 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-29 09:50:37,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:37,214 INFO L225 Difference]: With dead ends: 32 [2020-10-29 09:50:37,214 INFO L226 Difference]: Without dead ends: 23 [2020-10-29 09:50:37,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:50:37,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-29 09:50:37,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-29 09:50:37,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-29 09:50:37,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-10-29 09:50:37,222 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2020-10-29 09:50:37,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:37,222 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-10-29 09:50:37,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:50:37,222 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-10-29 09:50:37,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-29 09:50:37,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:37,223 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:37,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 09:50:37,224 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:37,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:37,224 INFO L82 PathProgramCache]: Analyzing trace with hash -345098366, now seen corresponding path program 4 times [2020-10-29 09:50:37,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:37,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [859625695] [2020-10-29 09:50:37,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:37,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:37,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:37,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:37,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:37,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-29 09:50:37,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:50:37,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 223 [2020-10-29 09:50:37,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:37,460 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:37,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:50:37,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:37,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:50:37,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:50:37,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:37,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:37,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:37,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:37,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:37,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:37,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:50:37,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:37,579 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:37,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:37,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:37,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:37,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:37,585 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:37,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [859625695] [2020-10-29 09:50:37,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:37,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:50:37,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273395343] [2020-10-29 09:50:37,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:50:37,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:37,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:50:37,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:50:37,588 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 8 states. [2020-10-29 09:50:37,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:37,865 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-10-29 09:50:37,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:50:37,866 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-29 09:50:37,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:37,867 INFO L225 Difference]: With dead ends: 34 [2020-10-29 09:50:37,867 INFO L226 Difference]: Without dead ends: 25 [2020-10-29 09:50:37,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:50:37,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-29 09:50:37,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-29 09:50:37,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-29 09:50:37,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-10-29 09:50:37,874 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2020-10-29 09:50:37,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:37,874 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-10-29 09:50:37,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:50:37,875 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-10-29 09:50:37,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 09:50:37,875 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:37,876 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:37,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 09:50:37,876 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:37,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:37,876 INFO L82 PathProgramCache]: Analyzing trace with hash -856897563, now seen corresponding path program 5 times [2020-10-29 09:50:37,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:37,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938799877] [2020-10-29 09:50:37,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:37,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:37,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:37,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:38,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:38,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 09:50:38,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:50:38,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 183 [2020-10-29 09:50:38,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:38,074 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:38,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:50:38,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:38,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:50:38,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:38,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:38,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:38,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:38,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:38,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:38,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:38,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:50:38,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:38,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:38,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:38,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:38,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:38,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:38,220 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:38,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938799877] [2020-10-29 09:50:38,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:38,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:50:38,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255278222] [2020-10-29 09:50:38,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:50:38,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:38,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:50:38,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:50:38,226 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 9 states. [2020-10-29 09:50:38,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:38,521 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-10-29 09:50:38,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:50:38,521 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-29 09:50:38,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:38,522 INFO L225 Difference]: With dead ends: 36 [2020-10-29 09:50:38,522 INFO L226 Difference]: Without dead ends: 27 [2020-10-29 09:50:38,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:50:38,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-29 09:50:38,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-29 09:50:38,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-29 09:50:38,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-10-29 09:50:38,529 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2020-10-29 09:50:38,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:38,530 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-10-29 09:50:38,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:50:38,530 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-10-29 09:50:38,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 09:50:38,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:38,531 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:38,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 09:50:38,531 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:38,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:38,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1225313160, now seen corresponding path program 6 times [2020-10-29 09:50:38,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:38,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1058570467] [2020-10-29 09:50:38,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:38,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:38,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:38,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:38,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:38,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-29 09:50:38,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:50:38,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 224 [2020-10-29 09:50:38,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:38,768 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:38,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:50:38,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:38,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 09:50:38,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:38,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:38,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:38,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:38,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:38,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:38,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:38,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:50:38,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:38,939 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:38,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:38,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:38,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:38,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:38,946 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:38,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1058570467] [2020-10-29 09:50:38,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:38,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:50:38,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315167975] [2020-10-29 09:50:38,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:50:38,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:38,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:50:38,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:50:38,955 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 10 states. [2020-10-29 09:50:39,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:39,330 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2020-10-29 09:50:39,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:50:39,331 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-29 09:50:39,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:39,332 INFO L225 Difference]: With dead ends: 38 [2020-10-29 09:50:39,332 INFO L226 Difference]: Without dead ends: 29 [2020-10-29 09:50:39,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:50:39,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-29 09:50:39,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-29 09:50:39,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-29 09:50:39,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-10-29 09:50:39,343 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2020-10-29 09:50:39,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:39,343 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-10-29 09:50:39,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:50:39,344 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-10-29 09:50:39,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 09:50:39,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:39,345 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:39,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 09:50:39,345 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:39,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:39,345 INFO L82 PathProgramCache]: Analyzing trace with hash 775058027, now seen corresponding path program 7 times [2020-10-29 09:50:39,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:39,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [789641370] [2020-10-29 09:50:39,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:39,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:39,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:39,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:39,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:39,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:50:39,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:50:39,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 326 [2020-10-29 09:50:39,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:39,697 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:39,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:50:39,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:39,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 09:50:39,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:39,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:39,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:39,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:39,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:39,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:39,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:39,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:50:39,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:39,903 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:39,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:39,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:39,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:39,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:39,911 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:39,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [789641370] [2020-10-29 09:50:39,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:39,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:50:39,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821206203] [2020-10-29 09:50:39,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:50:39,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:39,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:50:39,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:50:39,914 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 11 states. [2020-10-29 09:50:40,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:40,470 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2020-10-29 09:50:40,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:50:40,471 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-29 09:50:40,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:40,471 INFO L225 Difference]: With dead ends: 40 [2020-10-29 09:50:40,472 INFO L226 Difference]: Without dead ends: 31 [2020-10-29 09:50:40,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:50:40,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-29 09:50:40,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-29 09:50:40,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-29 09:50:40,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-10-29 09:50:40,493 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2020-10-29 09:50:40,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:40,493 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-10-29 09:50:40,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:50:40,493 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-10-29 09:50:40,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:50:40,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:40,494 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:40,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 09:50:40,495 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:40,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:40,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1871572110, now seen corresponding path program 8 times [2020-10-29 09:50:40,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:40,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650427141] [2020-10-29 09:50:40,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:40,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:40,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:40,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:40,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:40,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:50:40,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:50:40,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 322 [2020-10-29 09:50:40,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:40,831 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:40,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:50:40,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:40,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 09:50:40,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:41,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:41,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:41,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:41,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:41,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:41,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:41,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:50:41,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:41,031 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:41,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:41,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:41,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:41,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:41,040 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:41,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [650427141] [2020-10-29 09:50:41,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:41,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:50:41,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582325965] [2020-10-29 09:50:41,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:50:41,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:41,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:50:41,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:50:41,044 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 12 states. [2020-10-29 09:50:41,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:41,709 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2020-10-29 09:50:41,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:50:41,709 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-29 09:50:41,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:41,710 INFO L225 Difference]: With dead ends: 42 [2020-10-29 09:50:41,710 INFO L226 Difference]: Without dead ends: 33 [2020-10-29 09:50:41,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:50:41,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-29 09:50:41,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-29 09:50:41,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-29 09:50:41,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-10-29 09:50:41,718 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2020-10-29 09:50:41,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:41,719 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-10-29 09:50:41,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:50:41,719 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-10-29 09:50:41,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:50:41,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:41,720 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:41,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 09:50:41,720 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:41,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:41,721 INFO L82 PathProgramCache]: Analyzing trace with hash -940348943, now seen corresponding path program 9 times [2020-10-29 09:50:41,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:41,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [35407617] [2020-10-29 09:50:41,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:41,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:41,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:41,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:42,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:42,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-29 09:50:42,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:50:42,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 313 [2020-10-29 09:50:42,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:42,048 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:42,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:50:42,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:42,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 09:50:42,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:50:42,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:42,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:42,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:42,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:42,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:42,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:42,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:50:42,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:42,279 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:42,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:42,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:42,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:42,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:50:42,287 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:42,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [35407617] [2020-10-29 09:50:42,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:42,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:50:42,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307294505] [2020-10-29 09:50:42,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:50:42,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:42,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:50:42,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:50:42,291 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2020-10-29 09:50:42,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:42,932 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2020-10-29 09:50:42,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:50:42,933 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-10-29 09:50:42,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:42,934 INFO L225 Difference]: With dead ends: 44 [2020-10-29 09:50:42,935 INFO L226 Difference]: Without dead ends: 35 [2020-10-29 09:50:42,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:50:42,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-29 09:50:42,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-29 09:50:42,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-29 09:50:42,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-10-29 09:50:42,947 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2020-10-29 09:50:42,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:42,948 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-10-29 09:50:42,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:50:42,948 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-10-29 09:50:42,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 09:50:42,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:42,949 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:42,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 09:50:42,949 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:42,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:42,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1662051692, now seen corresponding path program 10 times [2020-10-29 09:50:42,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:42,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1881940345] [2020-10-29 09:50:42,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:42,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:42,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:43,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:43,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:43,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-29 09:50:43,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:50:43,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 408 [2020-10-29 09:50:43,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:43,373 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:43,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:50:43,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:43,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 09:50:43,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:43,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:43,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:43,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:43,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:43,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:43,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:43,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:50:43,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:43,625 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:43,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:43,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:43,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:43,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:43,631 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:43,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1881940345] [2020-10-29 09:50:43,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:43,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:50:43,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141417630] [2020-10-29 09:50:43,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:50:43,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:43,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:50:43,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:50:43,634 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 14 states. [2020-10-29 09:50:44,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:44,314 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2020-10-29 09:50:44,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:50:44,315 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-10-29 09:50:44,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:44,316 INFO L225 Difference]: With dead ends: 46 [2020-10-29 09:50:44,316 INFO L226 Difference]: Without dead ends: 37 [2020-10-29 09:50:44,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:50:44,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-29 09:50:44,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-29 09:50:44,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-29 09:50:44,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-10-29 09:50:44,328 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2020-10-29 09:50:44,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:44,329 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-10-29 09:50:44,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:50:44,329 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-10-29 09:50:44,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-29 09:50:44,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:44,331 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:44,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 09:50:44,332 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:44,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:44,332 INFO L82 PathProgramCache]: Analyzing trace with hash 566308471, now seen corresponding path program 11 times [2020-10-29 09:50:44,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:44,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [87480833] [2020-10-29 09:50:44,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:44,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:44,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:44,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:44,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:44,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:50:44,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:50:44,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 510 [2020-10-29 09:50:44,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:44,864 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:44,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:50:44,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:44,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-29 09:50:44,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:45,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:45,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:45,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:45,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:45,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:45,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:45,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:50:45,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:45,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:45,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:45,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:45,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:45,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:45,161 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:45,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [87480833] [2020-10-29 09:50:45,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:45,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:50:45,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372667392] [2020-10-29 09:50:45,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:50:45,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:45,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:50:45,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:50:45,164 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 15 states. [2020-10-29 09:50:46,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:46,069 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2020-10-29 09:50:46,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:50:46,070 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2020-10-29 09:50:46,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:46,071 INFO L225 Difference]: With dead ends: 48 [2020-10-29 09:50:46,071 INFO L226 Difference]: Without dead ends: 39 [2020-10-29 09:50:46,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:50:46,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-29 09:50:46,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-29 09:50:46,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-29 09:50:46,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-10-29 09:50:46,089 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2020-10-29 09:50:46,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:46,089 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-10-29 09:50:46,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:50:46,089 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-10-29 09:50:46,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 09:50:46,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:46,093 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:46,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 09:50:46,093 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:46,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:46,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1168255590, now seen corresponding path program 12 times [2020-10-29 09:50:46,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:46,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [951919240] [2020-10-29 09:50:46,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:46,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:46,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:46,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:46,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:46,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-29 09:50:46,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:50:46,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 441 [2020-10-29 09:50:46,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:46,556 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:46,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:50:46,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:46,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 09:50:46,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:46,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:46,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:46,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:46,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:46,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:46,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:46,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:50:46,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:46,833 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:46,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:46,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:46,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:46,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:46,841 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:46,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [951919240] [2020-10-29 09:50:46,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:46,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:50:46,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573098955] [2020-10-29 09:50:46,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:50:46,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:46,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:50:46,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:50:46,844 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 16 states. [2020-10-29 09:50:47,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:47,780 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2020-10-29 09:50:47,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:50:47,780 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-10-29 09:50:47,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:47,782 INFO L225 Difference]: With dead ends: 50 [2020-10-29 09:50:47,782 INFO L226 Difference]: Without dead ends: 41 [2020-10-29 09:50:47,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2020-10-29 09:50:47,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-29 09:50:47,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-29 09:50:47,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-29 09:50:47,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-10-29 09:50:47,800 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2020-10-29 09:50:47,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:47,802 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-10-29 09:50:47,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:50:47,803 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-10-29 09:50:47,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-29 09:50:47,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:47,806 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:47,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 09:50:47,807 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:47,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:47,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1637007363, now seen corresponding path program 13 times [2020-10-29 09:50:47,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:47,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [38956631] [2020-10-29 09:50:47,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:47,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:47,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:47,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:48,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:48,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-29 09:50:48,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:50:48,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 574 [2020-10-29 09:50:48,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:48,403 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:48,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:50:48,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:48,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 09:50:48,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:50:48,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:48,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:48,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:48,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:48,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:48,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:48,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:50:48,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:48,732 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:48,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:48,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:48,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:48,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:48,740 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:48,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [38956631] [2020-10-29 09:50:48,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:48,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:50:48,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212274832] [2020-10-29 09:50:48,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:50:48,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:48,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:50:48,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:50:48,745 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 17 states. [2020-10-29 09:50:49,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:49,806 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2020-10-29 09:50:49,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:50:49,806 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 40 [2020-10-29 09:50:49,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:49,807 INFO L225 Difference]: With dead ends: 52 [2020-10-29 09:50:49,807 INFO L226 Difference]: Without dead ends: 43 [2020-10-29 09:50:49,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:50:49,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-29 09:50:49,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-29 09:50:49,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-29 09:50:49,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-10-29 09:50:49,820 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2020-10-29 09:50:49,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:49,820 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-10-29 09:50:49,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:50:49,821 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-10-29 09:50:49,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-29 09:50:49,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:49,823 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:49,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 09:50:49,823 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:49,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:49,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1135895136, now seen corresponding path program 14 times [2020-10-29 09:50:49,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:49,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323941120] [2020-10-29 09:50:49,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:49,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:49,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:49,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:50,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:50,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-29 09:50:50,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:50:50,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 462 [2020-10-29 09:50:50,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:50,309 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:50,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:50:50,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:50,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 09:50:50,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:50,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:50,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:50,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:50,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:50,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:50,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:50,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:50:50,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:50,677 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:50,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:50,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:50,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:50,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:50,686 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:50,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323941120] [2020-10-29 09:50:50,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:50,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:50:50,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675047779] [2020-10-29 09:50:50,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:50:50,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:50,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:50:50,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:50:50,693 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 18 states. [2020-10-29 09:50:51,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:51,784 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2020-10-29 09:50:51,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:50:51,784 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2020-10-29 09:50:51,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:51,785 INFO L225 Difference]: With dead ends: 54 [2020-10-29 09:50:51,785 INFO L226 Difference]: Without dead ends: 45 [2020-10-29 09:50:51,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 09:50:51,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-29 09:50:51,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-29 09:50:51,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-29 09:50:51,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-10-29 09:50:51,796 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2020-10-29 09:50:51,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:51,796 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-10-29 09:50:51,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:50:51,796 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-10-29 09:50:51,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-29 09:50:51,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:51,797 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:51,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 09:50:51,797 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:51,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:51,798 INFO L82 PathProgramCache]: Analyzing trace with hash -603382141, now seen corresponding path program 15 times [2020-10-29 09:50:51,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:51,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245367649] [2020-10-29 09:50:51,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:51,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:51,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:51,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:52,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:52,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-29 09:50:52,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:50:52,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 684 [2020-10-29 09:50:52,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:52,498 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:52,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 09:50:52,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:52,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-29 09:50:52,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:52,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:52,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:52,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:52,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:52,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:52,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:52,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:50:52,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:52,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:52,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:52,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:52,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:52,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:52,927 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:52,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245367649] [2020-10-29 09:50:52,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:52,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 09:50:52,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224307830] [2020-10-29 09:50:52,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 09:50:52,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:52,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 09:50:52,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:50:52,931 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 19 states. [2020-10-29 09:50:54,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:54,127 INFO L93 Difference]: Finished difference Result 56 states and 59 transitions. [2020-10-29 09:50:54,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:50:54,128 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 44 [2020-10-29 09:50:54,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:54,129 INFO L225 Difference]: With dead ends: 56 [2020-10-29 09:50:54,129 INFO L226 Difference]: Without dead ends: 47 [2020-10-29 09:50:54,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 09:50:54,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-29 09:50:54,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-29 09:50:54,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-29 09:50:54,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-10-29 09:50:54,139 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2020-10-29 09:50:54,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:54,139 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-10-29 09:50:54,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 09:50:54,139 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-10-29 09:50:54,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-29 09:50:54,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:54,140 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:54,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 09:50:54,140 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:54,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:54,141 INFO L82 PathProgramCache]: Analyzing trace with hash 40497830, now seen corresponding path program 16 times [2020-10-29 09:50:54,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:54,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [595519518] [2020-10-29 09:50:54,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:54,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:54,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:54,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:54,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:54,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 09:50:54,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:50:54,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 630 [2020-10-29 09:50:54,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:54,787 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:54,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 09:50:54,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:54,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-29 09:50:54,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:55,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:55,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:55,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:55,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:55,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:55,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:55,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:50:55,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:55,172 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:55,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:55,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:55,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:55,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:55,181 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:55,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [595519518] [2020-10-29 09:50:55,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:55,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 09:50:55,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339085551] [2020-10-29 09:50:55,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 09:50:55,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:55,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 09:50:55,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:50:55,185 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 20 states. [2020-10-29 09:50:56,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:56,577 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2020-10-29 09:50:56,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 09:50:56,577 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 46 [2020-10-29 09:50:56,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:56,578 INFO L225 Difference]: With dead ends: 58 [2020-10-29 09:50:56,578 INFO L226 Difference]: Without dead ends: 49 [2020-10-29 09:50:56,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 09:50:56,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-29 09:50:56,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-29 09:50:56,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-29 09:50:56,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-10-29 09:50:56,596 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2020-10-29 09:50:56,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:56,596 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-10-29 09:50:56,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 09:50:56,597 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-10-29 09:50:56,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 09:50:56,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:56,600 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:56,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 09:50:56,600 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:56,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:56,600 INFO L82 PathProgramCache]: Analyzing trace with hash 333859337, now seen corresponding path program 17 times [2020-10-29 09:50:56,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:56,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1052608689] [2020-10-29 09:50:56,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:56,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:56,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:56,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:57,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:57,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-29 09:50:57,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:50:57,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 759 [2020-10-29 09:50:57,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:57,382 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:57,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 09:50:57,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:57,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-29 09:50:57,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:57,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:57,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:57,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:57,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:57,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:57,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:57,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:50:57,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:57,800 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:57,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:57,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:57,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:57,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:57,812 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:57,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1052608689] [2020-10-29 09:50:57,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:57,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 09:50:57,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7959727] [2020-10-29 09:50:57,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 09:50:57,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:57,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 09:50:57,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:50:57,814 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 21 states. [2020-10-29 09:50:59,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:59,341 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2020-10-29 09:50:59,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 09:50:59,342 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 48 [2020-10-29 09:50:59,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:59,342 INFO L225 Difference]: With dead ends: 60 [2020-10-29 09:50:59,342 INFO L226 Difference]: Without dead ends: 51 [2020-10-29 09:50:59,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2020-10-29 09:50:59,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-29 09:50:59,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-29 09:50:59,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-29 09:50:59,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-10-29 09:50:59,366 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2020-10-29 09:50:59,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:59,366 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-10-29 09:50:59,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 09:50:59,367 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-10-29 09:50:59,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-29 09:50:59,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:59,367 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:59,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 09:50:59,367 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:59,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:59,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1213573972, now seen corresponding path program 18 times [2020-10-29 09:50:59,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:59,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1585529033] [2020-10-29 09:50:59,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:59,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:59,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:59,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:00,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:00,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-29 09:51:00,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:51:00,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 895 [2020-10-29 09:51:00,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:00,291 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:00,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 09:51:00,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:51:00,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 09:51:00,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:00,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:51:00,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:00,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:00,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:00,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:51:00,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:51:00,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:51:00,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:00,753 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:00,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:51:00,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:51:00,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:51:00,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:00,763 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 19 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:51:00,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1585529033] [2020-10-29 09:51:00,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:51:00,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 09:51:00,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751656566] [2020-10-29 09:51:00,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 09:51:00,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:51:00,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 09:51:00,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:51:00,768 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 22 states. [2020-10-29 09:51:02,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:51:02,378 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2020-10-29 09:51:02,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 09:51:02,379 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 50 [2020-10-29 09:51:02,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:51:02,380 INFO L225 Difference]: With dead ends: 62 [2020-10-29 09:51:02,380 INFO L226 Difference]: Without dead ends: 53 [2020-10-29 09:51:02,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2020-10-29 09:51:02,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-29 09:51:02,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-29 09:51:02,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-29 09:51:02,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-10-29 09:51:02,390 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2020-10-29 09:51:02,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:51:02,390 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-10-29 09:51:02,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 09:51:02,391 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-10-29 09:51:02,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 09:51:02,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:51:02,391 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:51:02,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 09:51:02,392 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:51:02,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:51:02,392 INFO L82 PathProgramCache]: Analyzing trace with hash 2056667791, now seen corresponding path program 19 times [2020-10-29 09:51:02,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:51:02,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [859806880] [2020-10-29 09:51:02,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:51:02,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:02,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:02,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:03,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:03,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-29 09:51:03,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:51:03,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1025 [2020-10-29 09:51:03,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:03,436 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:03,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-29 09:51:03,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:51:03,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 09:51:03,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:03,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:51:03,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:03,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:03,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:03,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:51:03,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:51:03,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:51:03,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:03,982 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:03,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:51:03,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:51:03,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:51:03,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:03,991 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:51:03,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [859806880] [2020-10-29 09:51:03,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:51:03,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-29 09:51:03,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889451262] [2020-10-29 09:51:03,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-29 09:51:03,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:51:03,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-29 09:51:03,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:51:03,994 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 23 states. [2020-10-29 09:51:05,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:51:05,837 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2020-10-29 09:51:05,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 09:51:05,839 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 52 [2020-10-29 09:51:05,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:51:05,839 INFO L225 Difference]: With dead ends: 64 [2020-10-29 09:51:05,839 INFO L226 Difference]: Without dead ends: 55 [2020-10-29 09:51:05,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2020-10-29 09:51:05,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-29 09:51:05,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-29 09:51:05,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-29 09:51:05,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-10-29 09:51:05,852 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2020-10-29 09:51:05,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:51:05,852 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-10-29 09:51:05,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-29 09:51:05,852 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-10-29 09:51:05,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-29 09:51:05,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:51:05,854 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:51:05,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 09:51:05,854 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:51:05,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:51:05,854 INFO L82 PathProgramCache]: Analyzing trace with hash 842941362, now seen corresponding path program 20 times [2020-10-29 09:51:05,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:51:05,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2000156522] [2020-10-29 09:51:05,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:51:05,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:05,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:05,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:06,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:06,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 09:51:06,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:51:06,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 710 [2020-10-29 09:51:06,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:06,582 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:06,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-29 09:51:06,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:51:06,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-29 09:51:06,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:07,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:51:07,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:07,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:07,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:07,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:51:07,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:51:07,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:51:07,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:07,184 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:07,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:51:07,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:51:07,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:51:07,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:07,193 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 21 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:51:07,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2000156522] [2020-10-29 09:51:07,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:51:07,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-29 09:51:07,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517817225] [2020-10-29 09:51:07,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-29 09:51:07,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:51:07,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-29 09:51:07,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:51:07,196 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 24 states. [2020-10-29 09:51:09,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:51:09,240 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2020-10-29 09:51:09,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-29 09:51:09,241 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 54 [2020-10-29 09:51:09,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:51:09,242 INFO L225 Difference]: With dead ends: 66 [2020-10-29 09:51:09,242 INFO L226 Difference]: Without dead ends: 57 [2020-10-29 09:51:09,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=189, Invalid=1791, Unknown=0, NotChecked=0, Total=1980 [2020-10-29 09:51:09,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-29 09:51:09,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-29 09:51:09,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-29 09:51:09,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-10-29 09:51:09,252 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2020-10-29 09:51:09,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:51:09,252 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-10-29 09:51:09,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-29 09:51:09,252 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-10-29 09:51:09,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-29 09:51:09,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:51:09,253 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:51:09,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 09:51:09,253 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:51:09,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:51:09,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1612019691, now seen corresponding path program 21 times [2020-10-29 09:51:09,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:51:09,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1068268455] [2020-10-29 09:51:09,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:51:09,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:09,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:09,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:10,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:10,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-29 09:51:10,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:51:10,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 978 [2020-10-29 09:51:10,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:10,249 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:10,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-29 09:51:10,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:51:10,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-29 09:51:10,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:10,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:51:10,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:10,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:10,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:10,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:51:10,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:51:10,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:51:10,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:10,877 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:10,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:51:10,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:51:10,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:51:10,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:10,888 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 22 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:51:10,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1068268455] [2020-10-29 09:51:10,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:51:10,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-29 09:51:10,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561281519] [2020-10-29 09:51:10,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-29 09:51:10,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:51:10,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-29 09:51:10,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:51:10,890 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 25 states. [2020-10-29 09:51:13,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:51:13,017 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2020-10-29 09:51:13,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 09:51:13,018 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 56 [2020-10-29 09:51:13,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:51:13,019 INFO L225 Difference]: With dead ends: 68 [2020-10-29 09:51:13,019 INFO L226 Difference]: Without dead ends: 59 [2020-10-29 09:51:13,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=198, Invalid=1964, Unknown=0, NotChecked=0, Total=2162 [2020-10-29 09:51:13,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-29 09:51:13,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-29 09:51:13,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-29 09:51:13,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-10-29 09:51:13,028 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2020-10-29 09:51:13,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:51:13,028 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-10-29 09:51:13,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-29 09:51:13,028 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-10-29 09:51:13,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-29 09:51:13,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:51:13,029 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:51:13,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 09:51:13,030 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:51:13,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:51:13,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1402421176, now seen corresponding path program 22 times [2020-10-29 09:51:13,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:51:13,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1849935239] [2020-10-29 09:51:13,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:51:13,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:13,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:13,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:14,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:14,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-29 09:51:14,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:51:14,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1041 [2020-10-29 09:51:14,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:14,087 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:14,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-29 09:51:14,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:51:14,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-29 09:51:14,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:14,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:51:14,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:14,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:14,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:14,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:51:14,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:51:14,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:51:14,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:14,778 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:14,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:51:14,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:51:14,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:51:14,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:14,789 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 23 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:51:14,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1849935239] [2020-10-29 09:51:14,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:51:14,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-29 09:51:14,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679788140] [2020-10-29 09:51:14,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-29 09:51:14,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:51:14,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-29 09:51:14,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2020-10-29 09:51:14,792 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 26 states. [2020-10-29 09:51:17,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:51:17,002 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2020-10-29 09:51:17,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 09:51:17,004 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 58 [2020-10-29 09:51:17,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:51:17,006 INFO L225 Difference]: With dead ends: 70 [2020-10-29 09:51:17,006 INFO L226 Difference]: Without dead ends: 61 [2020-10-29 09:51:17,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=207, Invalid=2145, Unknown=0, NotChecked=0, Total=2352 [2020-10-29 09:51:17,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-29 09:51:17,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-29 09:51:17,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-29 09:51:17,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2020-10-29 09:51:17,014 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2020-10-29 09:51:17,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:51:17,014 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2020-10-29 09:51:17,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-29 09:51:17,015 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2020-10-29 09:51:17,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-29 09:51:17,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:51:17,015 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:51:17,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-29 09:51:17,016 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:51:17,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:51:17,016 INFO L82 PathProgramCache]: Analyzing trace with hash -822830437, now seen corresponding path program 23 times [2020-10-29 09:51:17,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:51:17,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773594606] [2020-10-29 09:51:17,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:51:17,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:17,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:17,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:18,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:18,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-29 09:51:18,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:51:18,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1007 [2020-10-29 09:51:18,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:18,041 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:18,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-29 09:51:18,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:51:18,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-29 09:51:18,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:18,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:51:18,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:18,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:18,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:18,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:51:18,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:51:18,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:51:18,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:18,760 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:18,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:51:18,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:51:18,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:51:18,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:18,770 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 24 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:51:18,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773594606] [2020-10-29 09:51:18,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:51:18,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-29 09:51:18,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753624001] [2020-10-29 09:51:18,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-29 09:51:18,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:51:18,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-29 09:51:18,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:51:18,773 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 27 states. [2020-10-29 09:51:21,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:51:21,247 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2020-10-29 09:51:21,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-29 09:51:21,248 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 60 [2020-10-29 09:51:21,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:51:21,249 INFO L225 Difference]: With dead ends: 72 [2020-10-29 09:51:21,249 INFO L226 Difference]: Without dead ends: 63 [2020-10-29 09:51:21,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=216, Invalid=2334, Unknown=0, NotChecked=0, Total=2550 [2020-10-29 09:51:21,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-29 09:51:21,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-29 09:51:21,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-29 09:51:21,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-10-29 09:51:21,258 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 60 [2020-10-29 09:51:21,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:51:21,258 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-10-29 09:51:21,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-29 09:51:21,258 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-10-29 09:51:21,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-29 09:51:21,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:51:21,259 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:51:21,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-29 09:51:21,260 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:51:21,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:51:21,260 INFO L82 PathProgramCache]: Analyzing trace with hash -395917122, now seen corresponding path program 24 times [2020-10-29 09:51:21,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:51:21,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [298266368] [2020-10-29 09:51:21,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:51:21,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:21,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:21,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:22,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:22,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 09:51:22,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:51:22,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1259 [2020-10-29 09:51:22,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:22,536 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:22,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-29 09:51:22,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:51:22,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-29 09:51:22,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:23,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:51:23,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:23,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:23,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:23,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:51:23,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:51:23,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:51:23,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:23,311 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:23,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:51:23,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:51:23,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:51:23,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:23,322 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 25 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:51:23,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [298266368] [2020-10-29 09:51:23,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:51:23,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-29 09:51:23,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443214286] [2020-10-29 09:51:23,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-29 09:51:23,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:51:23,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-29 09:51:23,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2020-10-29 09:51:23,324 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 28 states. [2020-10-29 09:51:25,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:51:25,935 INFO L93 Difference]: Finished difference Result 74 states and 77 transitions. [2020-10-29 09:51:25,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-29 09:51:25,936 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 62 [2020-10-29 09:51:25,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:51:25,937 INFO L225 Difference]: With dead ends: 74 [2020-10-29 09:51:25,937 INFO L226 Difference]: Without dead ends: 65 [2020-10-29 09:51:25,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=225, Invalid=2531, Unknown=0, NotChecked=0, Total=2756 [2020-10-29 09:51:25,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-29 09:51:25,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-29 09:51:25,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-29 09:51:25,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2020-10-29 09:51:25,945 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 62 [2020-10-29 09:51:25,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:51:25,946 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2020-10-29 09:51:25,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-29 09:51:25,946 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2020-10-29 09:51:25,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-29 09:51:25,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:51:25,946 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:51:25,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-29 09:51:25,946 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:51:25,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:51:25,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1845885473, now seen corresponding path program 25 times [2020-10-29 09:51:25,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:51:25,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [671633455] [2020-10-29 09:51:25,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:51:25,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:25,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:26,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:27,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:27,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-29 09:51:27,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:51:27,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1374 [2020-10-29 09:51:27,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:27,339 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:27,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-29 09:51:27,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:51:27,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-29 09:51:27,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:28,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:51:28,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:28,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:28,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:28,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:51:28,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:51:28,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:51:28,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:28,147 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:28,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:51:28,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:51:28,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:51:28,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:28,158 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 26 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:51:28,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [671633455] [2020-10-29 09:51:28,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:51:28,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-29 09:51:28,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724647284] [2020-10-29 09:51:28,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-29 09:51:28,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:51:28,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-29 09:51:28,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2020-10-29 09:51:28,160 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 29 states. [2020-10-29 09:51:30,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:51:30,993 INFO L93 Difference]: Finished difference Result 76 states and 79 transitions. [2020-10-29 09:51:30,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-29 09:51:30,994 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 64 [2020-10-29 09:51:30,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:51:30,996 INFO L225 Difference]: With dead ends: 76 [2020-10-29 09:51:30,996 INFO L226 Difference]: Without dead ends: 67 [2020-10-29 09:51:30,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=234, Invalid=2736, Unknown=0, NotChecked=0, Total=2970 [2020-10-29 09:51:30,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-29 09:51:31,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-29 09:51:31,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-29 09:51:31,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2020-10-29 09:51:31,004 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2020-10-29 09:51:31,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:51:31,004 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2020-10-29 09:51:31,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-29 09:51:31,004 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2020-10-29 09:51:31,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-29 09:51:31,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:51:31,005 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:51:31,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-29 09:51:31,005 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:51:31,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:51:31,006 INFO L82 PathProgramCache]: Analyzing trace with hash 144596676, now seen corresponding path program 26 times [2020-10-29 09:51:31,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:51:31,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137816187] [2020-10-29 09:51:31,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:51:31,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:31,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:31,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:32,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:32,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 09:51:32,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:51:32,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1175 [2020-10-29 09:51:32,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:32,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:32,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-29 09:51:32,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:51:32,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-29 09:51:32,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:33,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:51:33,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:33,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:33,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:33,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:51:33,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:51:33,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:51:33,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:33,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:33,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:51:33,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:51:33,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:51:33,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:33,045 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 27 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:51:33,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137816187] [2020-10-29 09:51:33,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:51:33,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-29 09:51:33,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80005000] [2020-10-29 09:51:33,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-29 09:51:33,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:51:33,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-29 09:51:33,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2020-10-29 09:51:33,049 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 30 states. [2020-10-29 09:51:36,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:51:36,007 INFO L93 Difference]: Finished difference Result 78 states and 81 transitions. [2020-10-29 09:51:36,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-29 09:51:36,008 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 66 [2020-10-29 09:51:36,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:51:36,009 INFO L225 Difference]: With dead ends: 78 [2020-10-29 09:51:36,010 INFO L226 Difference]: Without dead ends: 69 [2020-10-29 09:51:36,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=243, Invalid=2949, Unknown=0, NotChecked=0, Total=3192 [2020-10-29 09:51:36,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-29 09:51:36,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-10-29 09:51:36,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-29 09:51:36,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-10-29 09:51:36,019 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2020-10-29 09:51:36,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:51:36,019 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-10-29 09:51:36,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-29 09:51:36,019 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-10-29 09:51:36,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-29 09:51:36,020 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:51:36,020 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:51:36,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-29 09:51:36,020 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:51:36,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:51:36,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1588602535, now seen corresponding path program 27 times [2020-10-29 09:51:36,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:51:36,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1714136718] [2020-10-29 09:51:36,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:51:36,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:36,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:36,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:37,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:37,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 09:51:37,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:51:37,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 967 [2020-10-29 09:51:37,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:37,005 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:37,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-29 09:51:37,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:51:37,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-29 09:51:37,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:37,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:51:37,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:37,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:37,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:37,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:51:37,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:51:37,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:51:37,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:37,856 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:37,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:51:37,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:51:37,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:51:37,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:37,865 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 28 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:51:37,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1714136718] [2020-10-29 09:51:37,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:51:37,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-29 09:51:37,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841071132] [2020-10-29 09:51:37,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-29 09:51:37,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:51:37,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-29 09:51:37,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:51:37,867 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 31 states. [2020-10-29 09:51:40,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:51:40,937 INFO L93 Difference]: Finished difference Result 80 states and 83 transitions. [2020-10-29 09:51:40,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-29 09:51:40,938 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 68 [2020-10-29 09:51:40,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:51:40,939 INFO L225 Difference]: With dead ends: 80 [2020-10-29 09:51:40,939 INFO L226 Difference]: Without dead ends: 71 [2020-10-29 09:51:40,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=252, Invalid=3170, Unknown=0, NotChecked=0, Total=3422 [2020-10-29 09:51:40,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-29 09:51:40,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-29 09:51:40,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-29 09:51:40,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2020-10-29 09:51:40,948 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 68 [2020-10-29 09:51:40,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:51:40,948 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2020-10-29 09:51:40,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-29 09:51:40,948 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2020-10-29 09:51:40,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-29 09:51:40,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:51:40,949 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:51:40,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-29 09:51:40,949 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:51:40,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:51:40,950 INFO L82 PathProgramCache]: Analyzing trace with hash 2003796426, now seen corresponding path program 28 times [2020-10-29 09:51:40,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:51:40,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [206000749] [2020-10-29 09:51:40,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:51:40,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:40,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:41,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:41,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:41,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 09:51:41,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:51:41,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 802 [2020-10-29 09:51:41,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:41,770 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:41,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-29 09:51:41,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:51:41,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-29 09:51:41,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:42,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:51:42,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:42,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:42,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:42,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:51:42,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:51:42,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:51:42,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:42,708 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:42,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:51:42,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:51:42,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:51:42,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:42,717 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 29 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:51:42,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [206000749] [2020-10-29 09:51:42,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:51:42,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-29 09:51:42,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167349160] [2020-10-29 09:51:42,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-29 09:51:42,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:51:42,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-29 09:51:42,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2020-10-29 09:51:42,719 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 32 states. [2020-10-29 09:51:46,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:51:46,073 INFO L93 Difference]: Finished difference Result 82 states and 85 transitions. [2020-10-29 09:51:46,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-29 09:51:46,074 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 70 [2020-10-29 09:51:46,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:51:46,075 INFO L225 Difference]: With dead ends: 82 [2020-10-29 09:51:46,075 INFO L226 Difference]: Without dead ends: 73 [2020-10-29 09:51:46,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=261, Invalid=3399, Unknown=0, NotChecked=0, Total=3660 [2020-10-29 09:51:46,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-29 09:51:46,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-29 09:51:46,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-29 09:51:46,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2020-10-29 09:51:46,083 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 70 [2020-10-29 09:51:46,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:51:46,084 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2020-10-29 09:51:46,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-29 09:51:46,084 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2020-10-29 09:51:46,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 09:51:46,084 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:51:46,084 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:51:46,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-29 09:51:46,085 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:51:46,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:51:46,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1573167149, now seen corresponding path program 29 times [2020-10-29 09:51:46,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:51:46,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1751501564] [2020-10-29 09:51:46,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:51:46,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:46,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:46,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:47,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:47,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-29 09:51:47,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:51:47,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1044 [2020-10-29 09:51:47,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:47,144 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:47,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-29 09:51:47,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:51:47,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-29 09:51:47,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:48,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:51:48,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:48,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:48,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:48,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:51:48,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:51:48,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:51:48,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:48,193 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:48,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:51:48,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:51:48,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:51:48,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:48,206 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 30 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:51:48,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1751501564] [2020-10-29 09:51:48,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:51:48,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-29 09:51:48,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475573342] [2020-10-29 09:51:48,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-29 09:51:48,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:51:48,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-29 09:51:48,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 09:51:48,208 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 33 states. [2020-10-29 09:51:51,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:51:51,780 INFO L93 Difference]: Finished difference Result 84 states and 87 transitions. [2020-10-29 09:51:51,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-29 09:51:51,781 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 72 [2020-10-29 09:51:51,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:51:51,782 INFO L225 Difference]: With dead ends: 84 [2020-10-29 09:51:51,782 INFO L226 Difference]: Without dead ends: 75 [2020-10-29 09:51:51,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=270, Invalid=3636, Unknown=0, NotChecked=0, Total=3906 [2020-10-29 09:51:51,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-29 09:51:51,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-10-29 09:51:51,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-29 09:51:51,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-10-29 09:51:51,792 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2020-10-29 09:51:51,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:51:51,793 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-10-29 09:51:51,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-29 09:51:51,793 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-10-29 09:51:51,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-29 09:51:51,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:51:51,794 INFO L422 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:51:51,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-29 09:51:51,794 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:51:51,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:51:51,795 INFO L82 PathProgramCache]: Analyzing trace with hash 55292368, now seen corresponding path program 30 times [2020-10-29 09:51:51,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:51:51,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670557684] [2020-10-29 09:51:51,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:51:51,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:51,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:51,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:52,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:52,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-29 09:51:52,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:51:52,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 898 [2020-10-29 09:51:52,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:52,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:52,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-29 09:51:52,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:51:52,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-29 09:51:52,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:53,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:51:53,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:53,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:53,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:53,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:51:53,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:51:53,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:51:53,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:53,800 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:53,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:51:53,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:51:53,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:51:53,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:53,813 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 31 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:51:53,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670557684] [2020-10-29 09:51:53,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:51:53,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-29 09:51:53,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094400853] [2020-10-29 09:51:53,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-29 09:51:53,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:51:53,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-29 09:51:53,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2020-10-29 09:51:53,815 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 34 states. [2020-10-29 09:51:57,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:51:57,606 INFO L93 Difference]: Finished difference Result 86 states and 89 transitions. [2020-10-29 09:51:57,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-29 09:51:57,607 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 74 [2020-10-29 09:51:57,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:51:57,608 INFO L225 Difference]: With dead ends: 86 [2020-10-29 09:51:57,608 INFO L226 Difference]: Without dead ends: 77 [2020-10-29 09:51:57,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=279, Invalid=3881, Unknown=0, NotChecked=0, Total=4160 [2020-10-29 09:51:57,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-29 09:51:57,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-10-29 09:51:57,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-29 09:51:57,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2020-10-29 09:51:57,618 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2020-10-29 09:51:57,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:51:57,618 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2020-10-29 09:51:57,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-29 09:51:57,619 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2020-10-29 09:51:57,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-29 09:51:57,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:51:57,620 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:51:57,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-29 09:51:57,620 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:51:57,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:51:57,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1666508467, now seen corresponding path program 31 times [2020-10-29 09:51:57,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:51:57,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1875169868] [2020-10-29 09:51:57,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:51:57,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:57,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:57,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:59,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:59,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-29 09:51:59,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:51:59,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1514 [2020-10-29 09:51:59,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:59,153 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:59,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-29 09:51:59,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:51:59,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-29 09:51:59,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:00,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:00,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:00,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:00,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:00,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:00,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:00,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:52:00,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:00,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:00,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:00,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:00,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:00,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:00,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 32 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:00,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1875169868] [2020-10-29 09:52:00,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:00,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-29 09:52:00,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081530922] [2020-10-29 09:52:00,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-29 09:52:00,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:00,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-29 09:52:00,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 09:52:00,311 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 35 states. [2020-10-29 09:52:04,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:04,238 INFO L93 Difference]: Finished difference Result 88 states and 91 transitions. [2020-10-29 09:52:04,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-29 09:52:04,239 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 76 [2020-10-29 09:52:04,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:04,240 INFO L225 Difference]: With dead ends: 88 [2020-10-29 09:52:04,240 INFO L226 Difference]: Without dead ends: 79 [2020-10-29 09:52:04,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=288, Invalid=4134, Unknown=0, NotChecked=0, Total=4422 [2020-10-29 09:52:04,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-29 09:52:04,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-29 09:52:04,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-29 09:52:04,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2020-10-29 09:52:04,251 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 76 [2020-10-29 09:52:04,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:04,252 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2020-10-29 09:52:04,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-29 09:52:04,252 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2020-10-29 09:52:04,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-29 09:52:04,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:04,253 INFO L422 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:04,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-29 09:52:04,253 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:04,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:04,254 INFO L82 PathProgramCache]: Analyzing trace with hash -438014250, now seen corresponding path program 32 times [2020-10-29 09:52:04,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:04,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178033357] [2020-10-29 09:52:04,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:04,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:04,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:04,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:05,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:05,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 09:52:05,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:05,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1202 [2020-10-29 09:52:05,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:05,472 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:05,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-29 09:52:05,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:05,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-29 09:52:05,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:06,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:06,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:06,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:06,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:06,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:06,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:06,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:52:06,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:06,728 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:06,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:06,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:06,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:06,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:06,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 33 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:06,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178033357] [2020-10-29 09:52:06,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:06,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-29 09:52:06,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291406972] [2020-10-29 09:52:06,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-29 09:52:06,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:06,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-29 09:52:06,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1159, Unknown=0, NotChecked=0, Total=1260 [2020-10-29 09:52:06,745 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 36 states. [2020-10-29 09:52:10,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:10,850 INFO L93 Difference]: Finished difference Result 90 states and 93 transitions. [2020-10-29 09:52:10,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-29 09:52:10,851 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 78 [2020-10-29 09:52:10,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:10,852 INFO L225 Difference]: With dead ends: 90 [2020-10-29 09:52:10,852 INFO L226 Difference]: Without dead ends: 81 [2020-10-29 09:52:10,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=297, Invalid=4395, Unknown=0, NotChecked=0, Total=4692 [2020-10-29 09:52:10,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-29 09:52:10,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-10-29 09:52:10,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-29 09:52:10,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-10-29 09:52:10,861 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 78 [2020-10-29 09:52:10,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:10,862 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-10-29 09:52:10,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-29 09:52:10,862 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-10-29 09:52:10,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-29 09:52:10,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:10,863 INFO L422 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:10,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-29 09:52:10,863 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:10,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:10,863 INFO L82 PathProgramCache]: Analyzing trace with hash 45251129, now seen corresponding path program 33 times [2020-10-29 09:52:10,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:10,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561441920] [2020-10-29 09:52:10,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:10,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:10,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:11,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:11,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:11,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-29 09:52:11,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:11,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1108 [2020-10-29 09:52:11,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:11,991 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:11,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-29 09:52:11,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:11,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-29 09:52:11,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:13,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:13,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:13,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:13,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:13,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:13,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:13,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:52:13,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:13,266 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:13,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:13,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:13,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:13,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:13,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 34 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:13,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561441920] [2020-10-29 09:52:13,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:13,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-29 09:52:13,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684633507] [2020-10-29 09:52:13,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-29 09:52:13,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:13,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-29 09:52:13,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 09:52:13,279 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 37 states. [2020-10-29 09:52:17,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:17,657 INFO L93 Difference]: Finished difference Result 92 states and 95 transitions. [2020-10-29 09:52:17,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-29 09:52:17,658 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 80 [2020-10-29 09:52:17,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:17,659 INFO L225 Difference]: With dead ends: 92 [2020-10-29 09:52:17,659 INFO L226 Difference]: Without dead ends: 83 [2020-10-29 09:52:17,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=306, Invalid=4664, Unknown=0, NotChecked=0, Total=4970 [2020-10-29 09:52:17,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-29 09:52:17,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-29 09:52:17,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-29 09:52:17,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2020-10-29 09:52:17,666 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2020-10-29 09:52:17,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:17,667 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2020-10-29 09:52:17,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-29 09:52:17,667 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2020-10-29 09:52:17,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-29 09:52:17,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:17,667 INFO L422 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:17,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-29 09:52:17,668 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:17,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:17,668 INFO L82 PathProgramCache]: Analyzing trace with hash 606812380, now seen corresponding path program 34 times [2020-10-29 09:52:17,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:17,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2058575662] [2020-10-29 09:52:17,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:17,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:17,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:18,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:19,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:19,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-29 09:52:19,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:19,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1346 [2020-10-29 09:52:19,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:19,030 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:19,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-29 09:52:19,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:19,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-29 09:52:19,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:20,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:20,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:20,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:20,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:20,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:20,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:20,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:52:20,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:20,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:20,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:20,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:20,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:20,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:20,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 35 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:20,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2058575662] [2020-10-29 09:52:20,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:20,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-29 09:52:20,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710211856] [2020-10-29 09:52:20,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-29 09:52:20,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:20,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-29 09:52:20,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1299, Unknown=0, NotChecked=0, Total=1406 [2020-10-29 09:52:20,347 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 38 states. [2020-10-29 09:52:24,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:24,957 INFO L93 Difference]: Finished difference Result 94 states and 97 transitions. [2020-10-29 09:52:24,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-29 09:52:24,957 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 82 [2020-10-29 09:52:24,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:24,959 INFO L225 Difference]: With dead ends: 94 [2020-10-29 09:52:24,959 INFO L226 Difference]: Without dead ends: 85 [2020-10-29 09:52:24,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=315, Invalid=4941, Unknown=0, NotChecked=0, Total=5256 [2020-10-29 09:52:24,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-29 09:52:24,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-10-29 09:52:24,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-29 09:52:24,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2020-10-29 09:52:24,968 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 82 [2020-10-29 09:52:24,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:24,969 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2020-10-29 09:52:24,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-29 09:52:24,969 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2020-10-29 09:52:24,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-29 09:52:24,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:24,970 INFO L422 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:24,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-29 09:52:24,970 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:24,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:24,970 INFO L82 PathProgramCache]: Analyzing trace with hash -898704705, now seen corresponding path program 35 times [2020-10-29 09:52:24,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:24,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [515310736] [2020-10-29 09:52:24,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:24,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:25,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:25,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:26,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:26,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-29 09:52:26,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:26,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1825 [2020-10-29 09:52:26,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:26,817 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:26,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-29 09:52:26,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:26,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-29 09:52:26,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:28,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:28,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:28,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:28,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:28,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:28,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:28,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:52:28,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:28,217 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:28,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:28,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:28,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:28,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:28,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 36 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:28,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [515310736] [2020-10-29 09:52:28,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:28,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-29 09:52:28,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337212436] [2020-10-29 09:52:28,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-29 09:52:28,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:28,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-29 09:52:28,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2020-10-29 09:52:28,232 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 39 states. [2020-10-29 09:52:33,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:33,098 INFO L93 Difference]: Finished difference Result 96 states and 99 transitions. [2020-10-29 09:52:33,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-29 09:52:33,099 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 84 [2020-10-29 09:52:33,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:33,100 INFO L225 Difference]: With dead ends: 96 [2020-10-29 09:52:33,100 INFO L226 Difference]: Without dead ends: 87 [2020-10-29 09:52:33,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=324, Invalid=5226, Unknown=0, NotChecked=0, Total=5550 [2020-10-29 09:52:33,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-29 09:52:33,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-10-29 09:52:33,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-29 09:52:33,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-10-29 09:52:33,110 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 84 [2020-10-29 09:52:33,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:33,110 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-10-29 09:52:33,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-29 09:52:33,110 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-10-29 09:52:33,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-29 09:52:33,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:33,111 INFO L422 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:33,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-29 09:52:33,111 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:33,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:33,111 INFO L82 PathProgramCache]: Analyzing trace with hash -296644638, now seen corresponding path program 36 times [2020-10-29 09:52:33,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:33,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [526008522] [2020-10-29 09:52:33,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:33,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:33,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:33,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:35,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:35,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-29 09:52:35,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:35,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1940 [2020-10-29 09:52:35,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:35,077 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:35,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-29 09:52:35,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:35,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-29 09:52:35,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:36,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:36,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:36,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:36,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:36,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:36,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:36,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:52:36,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:36,602 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:36,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:36,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:36,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:36,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:36,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 37 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:36,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [526008522] [2020-10-29 09:52:36,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:36,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-29 09:52:36,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543100201] [2020-10-29 09:52:36,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-29 09:52:36,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:36,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-29 09:52:36,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1447, Unknown=0, NotChecked=0, Total=1560 [2020-10-29 09:52:36,619 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 40 states. [2020-10-29 09:52:41,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:41,841 INFO L93 Difference]: Finished difference Result 98 states and 101 transitions. [2020-10-29 09:52:41,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-29 09:52:41,842 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 86 [2020-10-29 09:52:41,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:41,843 INFO L225 Difference]: With dead ends: 98 [2020-10-29 09:52:41,843 INFO L226 Difference]: Without dead ends: 89 [2020-10-29 09:52:41,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=333, Invalid=5519, Unknown=0, NotChecked=0, Total=5852 [2020-10-29 09:52:41,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-29 09:52:41,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-10-29 09:52:41,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-29 09:52:41,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2020-10-29 09:52:41,853 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 86 [2020-10-29 09:52:41,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:41,854 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2020-10-29 09:52:41,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-29 09:52:41,854 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2020-10-29 09:52:41,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-29 09:52:41,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:41,855 INFO L422 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:41,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-29 09:52:41,855 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:41,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:41,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1537505211, now seen corresponding path program 37 times [2020-10-29 09:52:41,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:41,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1631973792] [2020-10-29 09:52:41,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:41,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:41,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:41,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:43,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:43,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-29 09:52:43,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:43,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1780 [2020-10-29 09:52:43,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:43,658 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:43,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-29 09:52:43,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:43,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-29 09:52:43,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:45,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:45,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:45,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:45,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:45,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:45,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:45,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:52:45,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:45,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:45,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:45,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:45,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:45,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:45,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 38 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:45,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1631973792] [2020-10-29 09:52:45,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:45,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-29 09:52:45,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480742593] [2020-10-29 09:52:45,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-29 09:52:45,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:45,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-29 09:52:45,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1524, Unknown=0, NotChecked=0, Total=1640 [2020-10-29 09:52:45,301 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 41 states. [2020-10-29 09:52:50,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:50,623 INFO L93 Difference]: Finished difference Result 100 states and 103 transitions. [2020-10-29 09:52:50,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-29 09:52:50,624 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 88 [2020-10-29 09:52:50,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:50,625 INFO L225 Difference]: With dead ends: 100 [2020-10-29 09:52:50,625 INFO L226 Difference]: Without dead ends: 91 [2020-10-29 09:52:50,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=342, Invalid=5820, Unknown=0, NotChecked=0, Total=6162 [2020-10-29 09:52:50,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-29 09:52:50,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-10-29 09:52:50,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-29 09:52:50,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2020-10-29 09:52:50,637 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 88 [2020-10-29 09:52:50,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:50,638 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2020-10-29 09:52:50,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-29 09:52:50,638 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2020-10-29 09:52:50,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-29 09:52:50,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:50,639 INFO L422 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:50,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-29 09:52:50,639 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:50,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:50,640 INFO L82 PathProgramCache]: Analyzing trace with hash -3607576, now seen corresponding path program 38 times [2020-10-29 09:52:50,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:50,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1569729200] [2020-10-29 09:52:50,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:50,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:50,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:51,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:52,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:52,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-29 09:52:52,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:52,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1754 [2020-10-29 09:52:52,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:52,417 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:52,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-29 09:52:52,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:52,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-29 09:52:52,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:54,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:54,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:54,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:54,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:54,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:54,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:54,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:52:54,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:54,008 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:54,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:54,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:54,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:54,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:54,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 39 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:54,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1569729200] [2020-10-29 09:52:54,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:54,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-29 09:52:54,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886973605] [2020-10-29 09:52:54,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-29 09:52:54,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:54,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-29 09:52:54,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1603, Unknown=0, NotChecked=0, Total=1722 [2020-10-29 09:52:54,027 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 42 states. [2020-10-29 09:52:59,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:59,702 INFO L93 Difference]: Finished difference Result 102 states and 105 transitions. [2020-10-29 09:52:59,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-29 09:52:59,703 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 90 [2020-10-29 09:52:59,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:59,704 INFO L225 Difference]: With dead ends: 102 [2020-10-29 09:52:59,704 INFO L226 Difference]: Without dead ends: 93 [2020-10-29 09:52:59,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=351, Invalid=6129, Unknown=0, NotChecked=0, Total=6480 [2020-10-29 09:52:59,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-29 09:52:59,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-10-29 09:52:59,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-29 09:52:59,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2020-10-29 09:52:59,715 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 90 [2020-10-29 09:52:59,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:59,715 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2020-10-29 09:52:59,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-29 09:52:59,716 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2020-10-29 09:52:59,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-29 09:52:59,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:59,716 INFO L422 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:59,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-29 09:52:59,717 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:59,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:59,717 INFO L82 PathProgramCache]: Analyzing trace with hash 898237131, now seen corresponding path program 39 times [2020-10-29 09:52:59,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:59,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1044570230] [2020-10-29 09:52:59,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:59,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:59,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:01,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:02,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:02,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-29 09:53:02,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:02,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2511 [2020-10-29 09:53:02,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:02,251 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:02,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-29 09:53:02,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:02,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-29 09:53:02,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:03,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:03,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:03,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:03,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:03,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:03,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:03,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:53:03,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:03,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:03,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:03,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:03,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:03,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:03,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 40 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:03,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1044570230] [2020-10-29 09:53:03,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:03,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-29 09:53:03,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993757180] [2020-10-29 09:53:03,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-29 09:53:03,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:03,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-29 09:53:03,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1684, Unknown=0, NotChecked=0, Total=1806 [2020-10-29 09:53:03,995 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 43 states. [2020-10-29 09:53:09,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:09,838 INFO L93 Difference]: Finished difference Result 104 states and 107 transitions. [2020-10-29 09:53:09,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-29 09:53:09,838 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 92 [2020-10-29 09:53:09,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:09,840 INFO L225 Difference]: With dead ends: 104 [2020-10-29 09:53:09,840 INFO L226 Difference]: Without dead ends: 95 [2020-10-29 09:53:09,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=360, Invalid=6446, Unknown=0, NotChecked=0, Total=6806 [2020-10-29 09:53:09,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-29 09:53:09,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-10-29 09:53:09,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-29 09:53:09,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2020-10-29 09:53:09,849 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 92 [2020-10-29 09:53:09,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:09,849 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2020-10-29 09:53:09,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-29 09:53:09,849 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2020-10-29 09:53:09,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-29 09:53:09,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:09,850 INFO L422 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:09,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-29 09:53:09,850 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:09,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:09,851 INFO L82 PathProgramCache]: Analyzing trace with hash -12393234, now seen corresponding path program 40 times [2020-10-29 09:53:09,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:09,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1196315225] [2020-10-29 09:53:09,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:09,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:09,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:11,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:11,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:11,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-29 09:53:11,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:11,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1944 [2020-10-29 09:53:11,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:11,820 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:11,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-29 09:53:11,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:11,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-29 09:53:11,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:13,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:13,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:13,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:13,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:13,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:13,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:13,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:53:13,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:13,579 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:13,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:13,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:13,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:13,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:13,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 41 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:13,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1196315225] [2020-10-29 09:53:13,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:13,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-29 09:53:13,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255713307] [2020-10-29 09:53:13,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-29 09:53:13,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:13,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-29 09:53:13,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1767, Unknown=0, NotChecked=0, Total=1892 [2020-10-29 09:53:13,597 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 44 states. [2020-10-29 09:53:19,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:19,603 INFO L93 Difference]: Finished difference Result 106 states and 109 transitions. [2020-10-29 09:53:19,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-29 09:53:19,609 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 94 [2020-10-29 09:53:19,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:19,610 INFO L225 Difference]: With dead ends: 106 [2020-10-29 09:53:19,610 INFO L226 Difference]: Without dead ends: 97 [2020-10-29 09:53:19,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=369, Invalid=6771, Unknown=0, NotChecked=0, Total=7140 [2020-10-29 09:53:19,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-29 09:53:19,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-10-29 09:53:19,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-29 09:53:19,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2020-10-29 09:53:19,619 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 94 [2020-10-29 09:53:19,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:19,620 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2020-10-29 09:53:19,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-29 09:53:19,620 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2020-10-29 09:53:19,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-29 09:53:19,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:19,621 INFO L422 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:19,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-29 09:53:19,621 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:19,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:19,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1045154385, now seen corresponding path program 41 times [2020-10-29 09:53:19,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:19,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [365310363] [2020-10-29 09:53:19,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:19,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:19,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:19,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:22,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:22,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-29 09:53:22,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:22,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2439 [2020-10-29 09:53:22,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:22,079 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:22,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-29 09:53:22,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:22,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-29 09:53:22,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:23,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:23,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:23,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:23,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:23,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:23,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:23,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:53:23,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:23,981 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:23,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:23,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:23,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:23,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:23,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 42 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:23,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [365310363] [2020-10-29 09:53:23,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:23,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-29 09:53:23,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907288177] [2020-10-29 09:53:23,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-29 09:53:23,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:23,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-29 09:53:23,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1852, Unknown=0, NotChecked=0, Total=1980 [2020-10-29 09:53:23,999 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 45 states. [2020-10-29 09:53:30,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:30,454 INFO L93 Difference]: Finished difference Result 108 states and 111 transitions. [2020-10-29 09:53:30,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-29 09:53:30,455 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 96 [2020-10-29 09:53:30,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:30,456 INFO L225 Difference]: With dead ends: 108 [2020-10-29 09:53:30,456 INFO L226 Difference]: Without dead ends: 99 [2020-10-29 09:53:30,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=378, Invalid=7104, Unknown=0, NotChecked=0, Total=7482 [2020-10-29 09:53:30,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-29 09:53:30,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-10-29 09:53:30,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-29 09:53:30,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2020-10-29 09:53:30,464 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 96 [2020-10-29 09:53:30,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:30,464 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2020-10-29 09:53:30,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-29 09:53:30,464 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2020-10-29 09:53:30,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-29 09:53:30,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:30,465 INFO L422 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:30,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-29 09:53:30,465 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:30,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:30,465 INFO L82 PathProgramCache]: Analyzing trace with hash -558832908, now seen corresponding path program 42 times [2020-10-29 09:53:30,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:30,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1365027289] [2020-10-29 09:53:30,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:30,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:30,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:30,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:32,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:32,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-29 09:53:32,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:32,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1954 [2020-10-29 09:53:32,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:32,441 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:32,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-29 09:53:32,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:32,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-29 09:53:32,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:34,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:34,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:34,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:34,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:34,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:34,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:34,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:53:34,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:34,425 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:34,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:34,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:34,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:34,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:34,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 43 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:34,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1365027289] [2020-10-29 09:53:34,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:34,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-29 09:53:34,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353604732] [2020-10-29 09:53:34,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-29 09:53:34,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:34,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-29 09:53:34,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1939, Unknown=0, NotChecked=0, Total=2070 [2020-10-29 09:53:34,456 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 46 states. [2020-10-29 09:53:41,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:41,174 INFO L93 Difference]: Finished difference Result 110 states and 113 transitions. [2020-10-29 09:53:41,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-29 09:53:41,175 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 98 [2020-10-29 09:53:41,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:41,176 INFO L225 Difference]: With dead ends: 110 [2020-10-29 09:53:41,176 INFO L226 Difference]: Without dead ends: 101 [2020-10-29 09:53:41,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=387, Invalid=7445, Unknown=0, NotChecked=0, Total=7832 [2020-10-29 09:53:41,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-29 09:53:41,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2020-10-29 09:53:41,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-29 09:53:41,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2020-10-29 09:53:41,186 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 98 [2020-10-29 09:53:41,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:41,187 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2020-10-29 09:53:41,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-29 09:53:41,187 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2020-10-29 09:53:41,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-29 09:53:41,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:41,188 INFO L422 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:41,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-29 09:53:41,188 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:41,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:41,188 INFO L82 PathProgramCache]: Analyzing trace with hash -97362217, now seen corresponding path program 43 times [2020-10-29 09:53:41,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:41,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1218499328] [2020-10-29 09:53:41,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:41,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:41,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:42,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:44,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:44,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-29 09:53:44,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:44,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2878 [2020-10-29 09:53:44,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:44,087 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:44,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-29 09:53:44,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:44,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-29 09:53:44,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:46,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:46,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:46,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:46,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:46,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:46,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:46,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:53:46,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:46,130 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:46,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:46,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:46,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:46,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:46,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 44 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:46,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1218499328] [2020-10-29 09:53:46,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:46,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-29 09:53:46,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654168920] [2020-10-29 09:53:46,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-29 09:53:46,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:46,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-29 09:53:46,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2028, Unknown=0, NotChecked=0, Total=2162 [2020-10-29 09:53:46,149 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 47 states. [2020-10-29 09:53:53,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:53,086 INFO L93 Difference]: Finished difference Result 112 states and 115 transitions. [2020-10-29 09:53:53,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-29 09:53:53,087 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 100 [2020-10-29 09:53:53,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:53,088 INFO L225 Difference]: With dead ends: 112 [2020-10-29 09:53:53,088 INFO L226 Difference]: Without dead ends: 103 [2020-10-29 09:53:53,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=396, Invalid=7794, Unknown=0, NotChecked=0, Total=8190 [2020-10-29 09:53:53,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-29 09:53:53,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-10-29 09:53:53,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-29 09:53:53,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2020-10-29 09:53:53,099 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 100 [2020-10-29 09:53:53,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:53,099 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2020-10-29 09:53:53,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-29 09:53:53,099 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2020-10-29 09:53:53,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-29 09:53:53,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:53,100 INFO L422 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:53,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-29 09:53:53,100 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:53,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:53,101 INFO L82 PathProgramCache]: Analyzing trace with hash 994340346, now seen corresponding path program 44 times [2020-10-29 09:53:53,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:53,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1585910740] [2020-10-29 09:53:53,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:53,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:53,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:54,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:55,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:55,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-29 09:53:55,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:55,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2828 [2020-10-29 09:53:55,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:55,948 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:55,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-29 09:53:55,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:55,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-29 09:53:55,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:58,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:58,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:58,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:58,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:58,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:58,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:58,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:53:58,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:58,138 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:58,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:58,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:58,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:58,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:58,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 45 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:58,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1585910740] [2020-10-29 09:53:58,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:58,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-29 09:53:58,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502723749] [2020-10-29 09:53:58,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-29 09:53:58,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:58,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-29 09:53:58,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2119, Unknown=0, NotChecked=0, Total=2256 [2020-10-29 09:53:58,160 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 48 states. [2020-10-29 09:54:05,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:54:05,556 INFO L93 Difference]: Finished difference Result 114 states and 117 transitions. [2020-10-29 09:54:05,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-29 09:54:05,557 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 102 [2020-10-29 09:54:05,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:54:05,558 INFO L225 Difference]: With dead ends: 114 [2020-10-29 09:54:05,558 INFO L226 Difference]: Without dead ends: 105 [2020-10-29 09:54:05,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=405, Invalid=8151, Unknown=0, NotChecked=0, Total=8556 [2020-10-29 09:54:05,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-29 09:54:05,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2020-10-29 09:54:05,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-29 09:54:05,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2020-10-29 09:54:05,568 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 102 [2020-10-29 09:54:05,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:54:05,569 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2020-10-29 09:54:05,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-29 09:54:05,569 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2020-10-29 09:54:05,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-29 09:54:05,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:54:05,570 INFO L422 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:54:05,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-29 09:54:05,570 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:54:05,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:54:05,570 INFO L82 PathProgramCache]: Analyzing trace with hash -2146484131, now seen corresponding path program 45 times [2020-10-29 09:54:05,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:54:05,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1883742786] [2020-10-29 09:54:05,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:54:05,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:05,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:07,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:07,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:07,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-29 09:54:07,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:54:07,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2145 [2020-10-29 09:54:07,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:07,743 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:07,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-29 09:54:07,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:54:07,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-29 09:54:07,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:09,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:54:09,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:09,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:09,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:09,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:54:09,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:54:09,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:54:09,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:09,955 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:09,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:54:09,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:54:09,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:54:09,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:09,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 46 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:54:09,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1883742786] [2020-10-29 09:54:09,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:54:09,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-29 09:54:09,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151380268] [2020-10-29 09:54:09,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-29 09:54:09,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:54:09,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-29 09:54:09,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2212, Unknown=0, NotChecked=0, Total=2352 [2020-10-29 09:54:09,984 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 49 states. [2020-10-29 09:54:17,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:54:17,724 INFO L93 Difference]: Finished difference Result 116 states and 119 transitions. [2020-10-29 09:54:17,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-29 09:54:17,725 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 104 [2020-10-29 09:54:17,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:54:17,726 INFO L225 Difference]: With dead ends: 116 [2020-10-29 09:54:17,726 INFO L226 Difference]: Without dead ends: 107 [2020-10-29 09:54:17,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=414, Invalid=8516, Unknown=0, NotChecked=0, Total=8930 [2020-10-29 09:54:17,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-29 09:54:17,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-10-29 09:54:17,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-29 09:54:17,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2020-10-29 09:54:17,737 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 104 [2020-10-29 09:54:17,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:54:17,738 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2020-10-29 09:54:17,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-29 09:54:17,738 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2020-10-29 09:54:17,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-29 09:54:17,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:54:17,739 INFO L422 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:54:17,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-29 09:54:17,739 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:54:17,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:54:17,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1116797440, now seen corresponding path program 46 times [2020-10-29 09:54:17,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:54:17,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2116827693] [2020-10-29 09:54:17,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:54:17,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:17,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:19,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:20,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:20,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-29 09:54:20,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:54:20,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3060 [2020-10-29 09:54:20,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:20,821 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:20,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-29 09:54:20,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:54:20,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-29 09:54:20,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0