/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_6.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 15:10:55,425 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 15:10:55,428 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 15:10:55,482 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 15:10:55,483 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 15:10:55,490 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 15:10:55,492 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 15:10:55,496 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 15:10:55,499 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 15:10:55,506 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 15:10:55,507 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 15:10:55,509 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 15:10:55,509 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 15:10:55,512 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 15:10:55,515 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 15:10:55,517 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 15:10:55,518 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 15:10:55,522 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 15:10:55,529 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 15:10:55,537 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 15:10:55,539 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 15:10:55,541 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 15:10:55,544 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 15:10:55,546 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 15:10:55,554 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 15:10:55,555 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 15:10:55,555 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 15:10:55,557 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 15:10:55,558 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 15:10:55,559 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 15:10:55,559 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 15:10:55,560 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 15:10:55,562 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 15:10:55,563 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 15:10:55,565 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 15:10:55,565 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 15:10:55,566 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 15:10:55,566 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 15:10:55,566 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 15:10:55,567 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 15:10:55,568 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 15:10:55,576 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 15:10:55,630 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 15:10:55,631 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 15:10:55,635 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 15:10:55,636 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 15:10:55,636 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 15:10:55,636 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 15:10:55,637 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 15:10:55,637 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 15:10:55,637 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 15:10:55,637 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 15:10:55,639 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 15:10:55,639 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 15:10:55,639 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 15:10:55,640 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 15:10:55,640 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 15:10:55,640 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 15:10:55,640 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 15:10:55,641 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 15:10:55,641 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 15:10:55,641 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 15:10:55,641 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 15:10:55,642 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 15:10:55,642 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 15:10:55,642 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 15:10:55,642 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 15:10:55,643 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 15:10:55,643 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 15:10:55,643 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 15:10:55,643 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 15:10:55,644 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 15:10:56,070 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 15:10:56,119 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 15:10:56,122 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 15:10:56,124 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 15:10:56,124 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 15:10:56,125 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_6.c [2020-10-28 15:10:56,210 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8519d92a3/c478bcaef681474797a8ed95e1a7bccc/FLAG8e92ca8b3 [2020-10-28 15:10:56,797 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 15:10:56,798 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/mono-crafted_6.c [2020-10-28 15:10:56,803 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8519d92a3/c478bcaef681474797a8ed95e1a7bccc/FLAG8e92ca8b3 [2020-10-28 15:10:57,204 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8519d92a3/c478bcaef681474797a8ed95e1a7bccc [2020-10-28 15:10:57,211 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 15:10:57,218 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 15:10:57,223 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 15:10:57,223 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 15:10:57,227 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 15:10:57,228 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:10:57" (1/1) ... [2020-10-28 15:10:57,232 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ae5d17c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:10:57, skipping insertion in model container [2020-10-28 15:10:57,232 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:10:57" (1/1) ... [2020-10-28 15:10:57,240 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 15:10:57,255 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 15:10:57,411 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:10:57,419 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 15:10:57,432 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:10:57,448 INFO L208 MainTranslator]: Completed translation [2020-10-28 15:10:57,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:10:57 WrapperNode [2020-10-28 15:10:57,449 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 15:10:57,450 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 15:10:57,450 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 15:10:57,451 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 15:10:57,462 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:10:57" (1/1) ... [2020-10-28 15:10:57,462 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:10:57" (1/1) ... [2020-10-28 15:10:57,469 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:10:57" (1/1) ... [2020-10-28 15:10:57,469 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:10:57" (1/1) ... [2020-10-28 15:10:57,474 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:10:57" (1/1) ... [2020-10-28 15:10:57,478 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:10:57" (1/1) ... [2020-10-28 15:10:57,479 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:10:57" (1/1) ... [2020-10-28 15:10:57,481 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 15:10:57,482 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 15:10:57,482 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 15:10:57,482 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 15:10:57,483 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:10:57" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 15:10:57,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 15:10:57,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 15:10:57,577 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 15:10:57,577 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 15:10:57,577 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 15:10:57,577 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 15:10:57,577 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 15:10:57,577 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 15:10:57,577 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 15:10:57,578 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 15:10:57,578 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 15:10:57,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 15:10:57,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 15:10:57,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 15:10:57,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 15:10:57,579 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 15:10:57,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 15:10:58,030 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 15:10:58,030 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 15:10:58,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:10:58 BoogieIcfgContainer [2020-10-28 15:10:58,032 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 15:10:58,036 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 15:10:58,036 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 15:10:58,040 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 15:10:58,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 03:10:57" (1/3) ... [2020-10-28 15:10:58,042 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@606a6ec4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:10:58, skipping insertion in model container [2020-10-28 15:10:58,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:10:57" (2/3) ... [2020-10-28 15:10:58,042 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@606a6ec4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:10:58, skipping insertion in model container [2020-10-28 15:10:58,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:10:58" (3/3) ... [2020-10-28 15:10:58,045 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_6.c [2020-10-28 15:10:58,058 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 15:10:58,063 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 15:10:58,078 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 15:10:58,119 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 15:10:58,119 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 15:10:58,119 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 15:10:58,119 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 15:10:58,120 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 15:10:58,120 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 15:10:58,120 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 15:10:58,120 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 15:10:58,169 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-10-28 15:10:58,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-28 15:10:58,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:58,176 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:58,176 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:58,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:58,183 INFO L82 PathProgramCache]: Analyzing trace with hash 2071267928, now seen corresponding path program 1 times [2020-10-28 15:10:58,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:58,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [417984288] [2020-10-28 15:10:58,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:58,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:58,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:58,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:58,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 15:10:58,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:58,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-28 15:10:58,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:58,421 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:58,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:58,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:10:58,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:58,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 15:10:58,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:58,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:58,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:58,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:58,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:58,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:58,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-28 15:10:58,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:58,624 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:58,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:58,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:58,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:58,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 15:10:58,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:10:58,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [417984288] [2020-10-28 15:10:58,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:10:58,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 15:10:58,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162113718] [2020-10-28 15:10:58,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 15:10:58,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:58,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 15:10:58,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 15:10:58,696 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 3 states. [2020-10-28 15:10:58,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:58,777 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2020-10-28 15:10:58,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 15:10:58,780 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-28 15:10:58,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:58,788 INFO L225 Difference]: With dead ends: 39 [2020-10-28 15:10:58,788 INFO L226 Difference]: Without dead ends: 16 [2020-10-28 15:10:58,792 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 [2020-10-28 15:10:58,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-28 15:10:58,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-28 15:10:58,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-28 15:10:58,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-10-28 15:10:58,835 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2020-10-28 15:10:58,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:58,836 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-10-28 15:10:58,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 15:10:58,836 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-10-28 15:10:58,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-28 15:10:58,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:58,837 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:58,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 15:10:58,838 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:58,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:58,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1584572361, now seen corresponding path program 1 times [2020-10-28 15:10:58,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:58,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478668635] [2020-10-28 15:10:58,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:58,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:58,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:58,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:58,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 15:10:58,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:58,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-28 15:10:58,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:58,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:58,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:10:58,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:10:58,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 15:10:58,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:10:59,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:59,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:59,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:59,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:59,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:59,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:59,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 15:10:59,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:59,026 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:59,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:59,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:59,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:59,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:10:59,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:10:59,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478668635] [2020-10-28 15:10:59,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:10:59,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 15:10:59,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692638746] [2020-10-28 15:10:59,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 15:10:59,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:59,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 15:10:59,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 15:10:59,038 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 4 states. [2020-10-28 15:10:59,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:59,161 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2020-10-28 15:10:59,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 15:10:59,162 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-28 15:10:59,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:59,163 INFO L225 Difference]: With dead ends: 28 [2020-10-28 15:10:59,163 INFO L226 Difference]: Without dead ends: 18 [2020-10-28 15:10:59,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:10:59,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-28 15:10:59,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-28 15:10:59,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-28 15:10:59,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-10-28 15:10:59,172 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2020-10-28 15:10:59,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:59,173 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-10-28 15:10:59,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 15:10:59,173 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-10-28 15:10:59,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-28 15:10:59,174 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:59,174 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:59,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 15:10:59,174 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:59,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:59,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1703269908, now seen corresponding path program 1 times [2020-10-28 15:10:59,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:59,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1972771553] [2020-10-28 15:10:59,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:59,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:59,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:59,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:59,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 15:10:59,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:59,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-10-28 15:10:59,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:59,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:59,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:10:59,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 15:10:59,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 15:10:59,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:10:59,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:59,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:59,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:59,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:59,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:59,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:59,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 15:10:59,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:59,353 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:59,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:59,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:59,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:59,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:10:59,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:10:59,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1972771553] [2020-10-28 15:10:59,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:10:59,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 15:10:59,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361410480] [2020-10-28 15:10:59,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 15:10:59,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:59,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 15:10:59,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 15:10:59,364 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 4 states. [2020-10-28 15:10:59,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:59,487 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2020-10-28 15:10:59,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 15:10:59,488 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-28 15:10:59,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:59,489 INFO L225 Difference]: With dead ends: 31 [2020-10-28 15:10:59,489 INFO L226 Difference]: Without dead ends: 21 [2020-10-28 15:10:59,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:10:59,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-28 15:10:59,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-28 15:10:59,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-28 15:10:59,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-10-28 15:10:59,498 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 14 [2020-10-28 15:10:59,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:59,498 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-10-28 15:10:59,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 15:10:59,498 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-10-28 15:10:59,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 15:10:59,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:59,499 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:59,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 15:10:59,500 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:59,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:59,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1085784629, now seen corresponding path program 1 times [2020-10-28 15:10:59,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:59,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1246302647] [2020-10-28 15:10:59,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:59,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:59,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:59,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:59,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:59,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 15:10:59,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:10:59,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 209 [2020-10-28 15:10:59,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:59,724 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:59,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:10:59,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:10:59,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 15:10:59,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 15:10:59,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:59,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:59,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:59,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:59,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:59,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:59,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 15:10:59,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:59,817 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:59,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:59,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:59,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:59,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 15:10:59,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:10:59,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1246302647] [2020-10-28 15:10:59,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:59,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 15:10:59,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729817418] [2020-10-28 15:10:59,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:10:59,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:59,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:10:59,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:10:59,840 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 5 states. [2020-10-28 15:10:59,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:59,970 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2020-10-28 15:10:59,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 15:10:59,971 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-28 15:10:59,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:59,972 INFO L225 Difference]: With dead ends: 36 [2020-10-28 15:10:59,972 INFO L226 Difference]: Without dead ends: 23 [2020-10-28 15:10:59,973 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 [2020-10-28 15:10:59,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-28 15:10:59,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-28 15:10:59,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-28 15:10:59,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-10-28 15:10:59,980 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 18 [2020-10-28 15:10:59,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:59,981 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-10-28 15:10:59,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:10:59,981 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-10-28 15:10:59,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 15:10:59,982 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:59,982 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:59,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 15:10:59,983 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:59,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:59,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1091558936, now seen corresponding path program 2 times [2020-10-28 15:10:59,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:59,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2044966703] [2020-10-28 15:10:59,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:59,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:00,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:00,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:00,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:00,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 15:11:00,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:11:00,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-10-28 15:11:00,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:00,136 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:00,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:11:00,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 15:11:00,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 15:11:00,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:00,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:00,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:00,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:00,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:00,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:00,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:00,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:11:00,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:00,190 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:00,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:00,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:00,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:00,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:00,196 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 15:11:00,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2044966703] [2020-10-28 15:11:00,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:11:00,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 15:11:00,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749980758] [2020-10-28 15:11:00,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 15:11:00,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:00,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 15:11:00,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 15:11:00,199 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 4 states. [2020-10-28 15:11:00,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:00,278 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-10-28 15:11:00,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 15:11:00,279 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-28 15:11:00,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:00,281 INFO L225 Difference]: With dead ends: 33 [2020-10-28 15:11:00,281 INFO L226 Difference]: Without dead ends: 27 [2020-10-28 15:11:00,282 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 [2020-10-28 15:11:00,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-28 15:11:00,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-10-28 15:11:00,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-28 15:11:00,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-28 15:11:00,289 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 20 [2020-10-28 15:11:00,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:00,290 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-28 15:11:00,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 15:11:00,290 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-28 15:11:00,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 15:11:00,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:00,291 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:00,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 15:11:00,291 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:00,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:00,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1333910047, now seen corresponding path program 1 times [2020-10-28 15:11:00,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:00,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1430124071] [2020-10-28 15:11:00,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:00,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:00,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:00,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:00,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:00,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:00,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:00,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 15:11:00,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 15:11:00,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 470 [2020-10-28 15:11:00,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:00,775 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:00,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:11:00,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 15:11:00,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 15:11:00,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:00,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:00,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:00,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:00,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:00,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:00,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:00,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 15:11:00,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:00,833 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:00,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:00,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:00,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:00,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:11:00,838 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 15:11:00,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1430124071] [2020-10-28 15:11:00,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:00,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 15:11:00,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108941993] [2020-10-28 15:11:00,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:11:00,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:00,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:11:00,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:11:00,841 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 5 states. [2020-10-28 15:11:00,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:00,971 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2020-10-28 15:11:00,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 15:11:00,971 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-28 15:11:00,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:00,972 INFO L225 Difference]: With dead ends: 44 [2020-10-28 15:11:00,972 INFO L226 Difference]: Without dead ends: 29 [2020-10-28 15:11:00,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:11:00,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-28 15:11:00,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-28 15:11:00,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-28 15:11:00,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-10-28 15:11:00,980 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 24 [2020-10-28 15:11:00,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:00,980 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-10-28 15:11:00,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:11:00,980 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-10-28 15:11:00,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 15:11:00,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:00,982 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:00,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 15:11:00,982 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:00,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:00,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1919602712, now seen corresponding path program 2 times [2020-10-28 15:11:00,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:00,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1909311128] [2020-10-28 15:11:00,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:00,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:00,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:01,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:01,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:01,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:01,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:01,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:01,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 15:11:01,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 15:11:01,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 661 [2020-10-28 15:11:01,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:01,656 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:01,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:11:01,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 15:11:01,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 15:11:01,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:01,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:01,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:01,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:01,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:01,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:01,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:01,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:11:01,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:01,722 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:01,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:01,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:01,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:01,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:01,727 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 15:11:01,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1909311128] [2020-10-28 15:11:01,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:01,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 15:11:01,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144189105] [2020-10-28 15:11:01,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:11:01,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:01,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:11:01,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:11:01,730 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 6 states. [2020-10-28 15:11:01,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:01,885 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2020-10-28 15:11:01,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:11:01,886 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-10-28 15:11:01,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:01,887 INFO L225 Difference]: With dead ends: 52 [2020-10-28 15:11:01,887 INFO L226 Difference]: Without dead ends: 33 [2020-10-28 15:11:01,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:11:01,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-28 15:11:01,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-28 15:11:01,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-28 15:11:01,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-10-28 15:11:01,894 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 28 [2020-10-28 15:11:01,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:01,895 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-10-28 15:11:01,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:11:01,895 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-10-28 15:11:01,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 15:11:01,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:01,896 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:01,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 15:11:01,896 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:01,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:01,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1124497713, now seen corresponding path program 3 times [2020-10-28 15:11:01,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:01,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1334821364] [2020-10-28 15:11:01,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:01,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:01,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:01,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:01,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:02,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:02,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:02,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:03,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:03,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 15:11:03,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:11:03,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1160 [2020-10-28 15:11:03,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:03,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:03,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:11:03,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:11:03,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 15:11:03,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:03,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:03,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:03,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:03,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:03,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:03,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:03,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:11:03,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:03,156 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:03,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:03,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:03,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:03,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:11:03,165 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-28 15:11:03,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1334821364] [2020-10-28 15:11:03,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:03,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 15:11:03,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833126256] [2020-10-28 15:11:03,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:11:03,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:03,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:11:03,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:11:03,170 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 6 states. [2020-10-28 15:11:03,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:03,342 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2020-10-28 15:11:03,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:11:03,343 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2020-10-28 15:11:03,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:03,345 INFO L225 Difference]: With dead ends: 58 [2020-10-28 15:11:03,345 INFO L226 Difference]: Without dead ends: 35 [2020-10-28 15:11:03,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:11:03,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-28 15:11:03,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-28 15:11:03,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-28 15:11:03,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2020-10-28 15:11:03,361 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 32 [2020-10-28 15:11:03,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:03,361 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2020-10-28 15:11:03,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:11:03,362 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2020-10-28 15:11:03,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 15:11:03,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:03,364 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:03,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 15:11:03,365 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:03,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:03,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1692234796, now seen corresponding path program 4 times [2020-10-28 15:11:03,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:03,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1736141096] [2020-10-28 15:11:03,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:03,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:03,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:03,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:03,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:03,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:03,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:03,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:04,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:04,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 15:11:04,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:11:04,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1017 [2020-10-28 15:11:04,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:04,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:04,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:11:04,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-28 15:11:04,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 15:11:04,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:04,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:04,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:04,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:04,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:04,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:04,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:04,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:11:04,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:04,457 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:04,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:04,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:04,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:04,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:04,462 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-10-28 15:11:04,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1736141096] [2020-10-28 15:11:04,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:04,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 15:11:04,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942165961] [2020-10-28 15:11:04,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:11:04,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:04,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:11:04,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:11:04,465 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand 5 states. [2020-10-28 15:11:04,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:04,591 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2020-10-28 15:11:04,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 15:11:04,591 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-10-28 15:11:04,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:04,592 INFO L225 Difference]: With dead ends: 47 [2020-10-28 15:11:04,592 INFO L226 Difference]: Without dead ends: 41 [2020-10-28 15:11:04,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:11:04,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-28 15:11:04,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2020-10-28 15:11:04,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-28 15:11:04,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2020-10-28 15:11:04,600 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 34 [2020-10-28 15:11:04,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:04,600 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2020-10-28 15:11:04,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:11:04,600 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2020-10-28 15:11:04,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 15:11:04,601 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:04,602 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:04,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 15:11:04,602 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:04,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:04,602 INFO L82 PathProgramCache]: Analyzing trace with hash -523286053, now seen corresponding path program 5 times [2020-10-28 15:11:04,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:04,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [731895861] [2020-10-28 15:11:04,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:04,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:04,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:04,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:04,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:04,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:04,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:04,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:06,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:06,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 15:11:06,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:11:06,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1415 [2020-10-28 15:11:06,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:06,031 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:06,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:11:06,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 15:11:06,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 15:11:06,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:06,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:06,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:06,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:06,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:06,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:06,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:06,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:11:06,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:06,097 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:06,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:06,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:06,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:06,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:06,103 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 55 proven. 21 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-28 15:11:06,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [731895861] [2020-10-28 15:11:06,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:06,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 15:11:06,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632349992] [2020-10-28 15:11:06,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 15:11:06,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:06,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 15:11:06,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:11:06,106 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 7 states. [2020-10-28 15:11:06,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:06,319 INFO L93 Difference]: Finished difference Result 70 states and 86 transitions. [2020-10-28 15:11:06,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 15:11:06,320 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-10-28 15:11:06,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:06,321 INFO L225 Difference]: With dead ends: 70 [2020-10-28 15:11:06,321 INFO L226 Difference]: Without dead ends: 43 [2020-10-28 15:11:06,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:11:06,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-28 15:11:06,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-28 15:11:06,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-28 15:11:06,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2020-10-28 15:11:06,329 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 38 [2020-10-28 15:11:06,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:06,329 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2020-10-28 15:11:06,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 15:11:06,329 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2020-10-28 15:11:06,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 15:11:06,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:06,330 INFO L422 BasicCegarLoop]: trace histogram [9, 6, 6, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:06,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 15:11:06,331 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:06,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:06,331 INFO L82 PathProgramCache]: Analyzing trace with hash 590082212, now seen corresponding path program 6 times [2020-10-28 15:11:06,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:06,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [6315269] [2020-10-28 15:11:06,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:06,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:06,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:06,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:06,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:06,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:06,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:06,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:06,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:08,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:08,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 15:11:08,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 15:11:08,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1681 [2020-10-28 15:11:08,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:08,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:08,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:11:08,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 15:11:08,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 15:11:08,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:08,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:08,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:08,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:08,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:08,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:08,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:08,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:11:08,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:08,102 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:08,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:08,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:08,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:08,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:08,108 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 67 proven. 36 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-28 15:11:08,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [6315269] [2020-10-28 15:11:08,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:08,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:11:08,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144163003] [2020-10-28 15:11:08,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:11:08,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:08,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:11:08,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:11:08,110 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand 8 states. [2020-10-28 15:11:08,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:08,377 INFO L93 Difference]: Finished difference Result 78 states and 96 transitions. [2020-10-28 15:11:08,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:11:08,378 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2020-10-28 15:11:08,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:08,379 INFO L225 Difference]: With dead ends: 78 [2020-10-28 15:11:08,379 INFO L226 Difference]: Without dead ends: 47 [2020-10-28 15:11:08,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:11:08,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-28 15:11:08,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-28 15:11:08,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-28 15:11:08,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2020-10-28 15:11:08,392 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 42 [2020-10-28 15:11:08,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:08,392 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2020-10-28 15:11:08,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:11:08,392 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2020-10-28 15:11:08,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 15:11:08,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:08,395 INFO L422 BasicCegarLoop]: trace histogram [10, 7, 7, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:08,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 15:11:08,395 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:08,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:08,396 INFO L82 PathProgramCache]: Analyzing trace with hash 97913581, now seen corresponding path program 7 times [2020-10-28 15:11:08,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:08,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792910790] [2020-10-28 15:11:08,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:08,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:08,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:08,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:08,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:08,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:08,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:08,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:08,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:08,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:11,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:11,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 15:11:11,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 15:11:11,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2874 [2020-10-28 15:11:11,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:11,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:11,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:11:11,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:11:11,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 15:11:11,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:11,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:11,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:11,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:11,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:11,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:11,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:11,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:11:11,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:11,374 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:11,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:11,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:11,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:11,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:11,380 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 67 proven. 20 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-28 15:11:11,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792910790] [2020-10-28 15:11:11,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:11,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:11:11,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498484058] [2020-10-28 15:11:11,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:11:11,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:11,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:11:11,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:11:11,383 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand 8 states. [2020-10-28 15:11:11,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:11,613 INFO L93 Difference]: Finished difference Result 86 states and 106 transitions. [2020-10-28 15:11:11,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:11:11,613 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2020-10-28 15:11:11,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:11,614 INFO L225 Difference]: With dead ends: 86 [2020-10-28 15:11:11,614 INFO L226 Difference]: Without dead ends: 51 [2020-10-28 15:11:11,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:11:11,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-28 15:11:11,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-28 15:11:11,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-28 15:11:11,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2020-10-28 15:11:11,623 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 46 [2020-10-28 15:11:11,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:11,623 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2020-10-28 15:11:11,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:11:11,623 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2020-10-28 15:11:11,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-28 15:11:11,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:11,624 INFO L422 BasicCegarLoop]: trace histogram [12, 7, 7, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:11,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 15:11:11,624 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:11,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:11,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1895845645, now seen corresponding path program 8 times [2020-10-28 15:11:11,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:11,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117350857] [2020-10-28 15:11:11,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:11,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:11,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:11,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:11,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:11,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:11,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:12,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:12,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:12,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:15,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:15,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-28 15:11:15,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 15:11:15,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3692 [2020-10-28 15:11:15,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:15,329 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:15,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:11:15,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-28 15:11:15,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 15:11:15,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:15,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:15,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:15,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:15,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:15,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:15,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:15,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:11:15,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:15,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:15,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:15,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:15,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:15,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:15,401 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 72 proven. 8 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2020-10-28 15:11:15,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [117350857] [2020-10-28 15:11:15,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:15,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 15:11:15,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262929908] [2020-10-28 15:11:15,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:11:15,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:15,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:11:15,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:11:15,404 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand 6 states. [2020-10-28 15:11:15,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:15,574 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2020-10-28 15:11:15,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:11:15,575 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 50 [2020-10-28 15:11:15,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:15,576 INFO L225 Difference]: With dead ends: 63 [2020-10-28 15:11:15,576 INFO L226 Difference]: Without dead ends: 57 [2020-10-28 15:11:15,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:11:15,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-28 15:11:15,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2020-10-28 15:11:15,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-28 15:11:15,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2020-10-28 15:11:15,584 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 50 [2020-10-28 15:11:15,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:15,585 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2020-10-28 15:11:15,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:11:15,585 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2020-10-28 15:11:15,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 15:11:15,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:15,586 INFO L422 BasicCegarLoop]: trace histogram [13, 8, 8, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:15,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 15:11:15,586 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:15,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:15,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1454979206, now seen corresponding path program 9 times [2020-10-28 15:11:15,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:15,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [140334708] [2020-10-28 15:11:15,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:15,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:15,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:15,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:15,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:15,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:15,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:15,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:15,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:16,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:19,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:19,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 15:11:19,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 15:11:19,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4209 [2020-10-28 15:11:19,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:19,808 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:19,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:11:19,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 15:11:19,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 15:11:19,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:19,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:19,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:19,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:19,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:19,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:19,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:19,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:11:19,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:19,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:19,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:19,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:19,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:19,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:19,927 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 142 proven. 55 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-28 15:11:19,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [140334708] [2020-10-28 15:11:19,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:19,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 15:11:19,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189054267] [2020-10-28 15:11:19,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 15:11:19,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:19,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 15:11:19,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:11:19,931 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand 9 states. [2020-10-28 15:11:20,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:20,248 INFO L93 Difference]: Finished difference Result 98 states and 122 transitions. [2020-10-28 15:11:20,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 15:11:20,248 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 54 [2020-10-28 15:11:20,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:20,249 INFO L225 Difference]: With dead ends: 98 [2020-10-28 15:11:20,249 INFO L226 Difference]: Without dead ends: 59 [2020-10-28 15:11:20,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:11:20,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-28 15:11:20,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-28 15:11:20,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-28 15:11:20,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2020-10-28 15:11:20,265 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 54 [2020-10-28 15:11:20,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:20,266 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2020-10-28 15:11:20,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 15:11:20,269 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2020-10-28 15:11:20,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 15:11:20,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:20,272 INFO L422 BasicCegarLoop]: trace histogram [14, 9, 9, 6, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:20,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 15:11:20,272 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:20,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:20,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1237477949, now seen corresponding path program 10 times [2020-10-28 15:11:20,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:20,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810893554] [2020-10-28 15:11:20,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:20,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:20,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:20,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:20,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:20,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:20,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:20,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:20,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:21,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:21,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:25,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:25,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 15:11:25,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 15:11:25,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 15:11:25,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:25,286 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:25,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:11:25,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 15:11:25,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 15:11:25,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:25,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:25,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:25,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:25,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:25,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:25,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:25,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:11:25,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:25,423 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:25,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:25,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:25,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:25,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:11:25,436 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 162 proven. 78 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-28 15:11:25,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810893554] [2020-10-28 15:11:25,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:25,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:11:25,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081893557] [2020-10-28 15:11:25,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:11:25,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:25,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:11:25,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:11:25,438 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand 10 states. [2020-10-28 15:11:25,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:25,877 INFO L93 Difference]: Finished difference Result 106 states and 132 transitions. [2020-10-28 15:11:25,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:11:25,878 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 58 [2020-10-28 15:11:25,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:25,879 INFO L225 Difference]: With dead ends: 106 [2020-10-28 15:11:25,879 INFO L226 Difference]: Without dead ends: 63 [2020-10-28 15:11:25,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:11:25,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-28 15:11:25,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-28 15:11:25,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-28 15:11:25,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2020-10-28 15:11:25,888 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 58 [2020-10-28 15:11:25,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:25,888 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2020-10-28 15:11:25,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:11:25,889 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2020-10-28 15:11:25,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-28 15:11:25,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:25,889 INFO L422 BasicCegarLoop]: trace histogram [15, 10, 10, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:25,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 15:11:25,890 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:25,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:25,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1289611380, now seen corresponding path program 11 times [2020-10-28 15:11:25,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:25,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117700286] [2020-10-28 15:11:25,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:25,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:25,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:25,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:25,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:25,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:25,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:25,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:25,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:26,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:26,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:27,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:30,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:30,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 15:11:30,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 15:11:30,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 15:11:30,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:30,902 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:30,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:11:30,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:11:30,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 15:11:30,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:31,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:31,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:31,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:31,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:31,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:31,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:31,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:11:31,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:31,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:31,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:31,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:31,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:31,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:31,024 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 137 proven. 42 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2020-10-28 15:11:31,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [117700286] [2020-10-28 15:11:31,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:31,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:11:31,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807254822] [2020-10-28 15:11:31,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:11:31,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:31,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:11:31,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:11:31,026 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand 10 states. [2020-10-28 15:11:31,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:31,368 INFO L93 Difference]: Finished difference Result 114 states and 142 transitions. [2020-10-28 15:11:31,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:11:31,369 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 62 [2020-10-28 15:11:31,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:31,370 INFO L225 Difference]: With dead ends: 114 [2020-10-28 15:11:31,370 INFO L226 Difference]: Without dead ends: 67 [2020-10-28 15:11:31,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:11:31,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-28 15:11:31,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-28 15:11:31,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-28 15:11:31,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2020-10-28 15:11:31,378 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 62 [2020-10-28 15:11:31,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:31,379 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2020-10-28 15:11:31,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:11:31,379 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2020-10-28 15:11:31,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 15:11:31,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:31,380 INFO L422 BasicCegarLoop]: trace histogram [17, 10, 10, 7, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:31,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 15:11:31,380 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:31,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:31,380 INFO L82 PathProgramCache]: Analyzing trace with hash -734334574, now seen corresponding path program 12 times [2020-10-28 15:11:31,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:31,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [215740442] [2020-10-28 15:11:31,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:31,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:31,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:31,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:31,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:31,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:31,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:31,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:31,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:31,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:31,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:33,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:36,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:36,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 15:11:36,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 15:11:36,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 15:11:36,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:36,392 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:36,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:11:36,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-28 15:11:36,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 15:11:36,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:36,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:36,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:36,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:36,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:36,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:36,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:36,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:11:36,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:36,460 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:36,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:36,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:36,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:36,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:36,475 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 143 proven. 18 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2020-10-28 15:11:36,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [215740442] [2020-10-28 15:11:36,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:36,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 15:11:36,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625765823] [2020-10-28 15:11:36,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 15:11:36,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:36,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 15:11:36,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:11:36,478 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand 7 states. [2020-10-28 15:11:36,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:36,714 INFO L93 Difference]: Finished difference Result 79 states and 96 transitions. [2020-10-28 15:11:36,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 15:11:36,715 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-10-28 15:11:36,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:36,716 INFO L225 Difference]: With dead ends: 79 [2020-10-28 15:11:36,716 INFO L226 Difference]: Without dead ends: 73 [2020-10-28 15:11:36,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:11:36,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-28 15:11:36,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2020-10-28 15:11:36,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-28 15:11:36,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 86 transitions. [2020-10-28 15:11:36,733 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 86 transitions. Word has length 66 [2020-10-28 15:11:36,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:36,733 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 86 transitions. [2020-10-28 15:11:36,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 15:11:36,733 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 86 transitions. [2020-10-28 15:11:36,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 15:11:36,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:36,734 INFO L422 BasicCegarLoop]: trace histogram [18, 11, 11, 7, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:36,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 15:11:36,734 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:36,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:36,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1738711193, now seen corresponding path program 13 times [2020-10-28 15:11:36,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:36,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1043933445] [2020-10-28 15:11:36,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:36,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:36,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:36,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:36,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:36,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:36,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:36,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:37,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:37,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:37,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:37,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:41,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:41,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 15:11:41,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 15:11:41,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 15:11:41,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:41,748 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:41,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:11:41,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 15:11:41,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 15:11:41,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:41,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:41,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:41,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:41,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:41,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:41,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:41,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:11:41,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:41,862 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:41,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:41,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:41,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:41,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:11:41,877 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 269 proven. 105 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-10-28 15:11:41,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1043933445] [2020-10-28 15:11:41,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:41,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 15:11:41,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944250761] [2020-10-28 15:11:41,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 15:11:41,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:41,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 15:11:41,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:11:41,889 INFO L87 Difference]: Start difference. First operand 71 states and 86 transitions. Second operand 11 states. [2020-10-28 15:11:42,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:42,360 INFO L93 Difference]: Finished difference Result 126 states and 158 transitions. [2020-10-28 15:11:42,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 15:11:42,361 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 70 [2020-10-28 15:11:42,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:42,362 INFO L225 Difference]: With dead ends: 126 [2020-10-28 15:11:42,362 INFO L226 Difference]: Without dead ends: 75 [2020-10-28 15:11:42,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:11:42,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-28 15:11:42,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-10-28 15:11:42,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-28 15:11:42,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 91 transitions. [2020-10-28 15:11:42,370 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 91 transitions. Word has length 70 [2020-10-28 15:11:42,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:42,371 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 91 transitions. [2020-10-28 15:11:42,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 15:11:42,371 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 91 transitions. [2020-10-28 15:11:42,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 15:11:42,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:42,372 INFO L422 BasicCegarLoop]: trace histogram [19, 12, 12, 8, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:42,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 15:11:42,372 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:42,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:42,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1711647134, now seen corresponding path program 14 times [2020-10-28 15:11:42,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:42,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1896465186] [2020-10-28 15:11:42,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:42,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:42,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:42,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:42,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:42,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:42,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:42,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:43,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:43,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:43,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:43,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:43,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:47,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:47,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-28 15:11:47,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 15:11:47,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 15:11:47,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:47,391 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:47,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:11:47,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-28 15:11:47,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 15:11:47,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:47,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:47,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:47,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:47,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:47,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:47,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:47,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:11:47,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:47,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:47,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:47,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:47,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:47,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:47,483 INFO L134 CoverageAnalysis]: Checked inductivity of 493 backedges. 202 proven. 32 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2020-10-28 15:11:47,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1896465186] [2020-10-28 15:11:47,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:47,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:11:47,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220700323] [2020-10-28 15:11:47,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:11:47,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:47,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:11:47,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:11:47,487 INFO L87 Difference]: Start difference. First operand 75 states and 91 transitions. Second operand 8 states. [2020-10-28 15:11:47,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:47,770 INFO L93 Difference]: Finished difference Result 87 states and 107 transitions. [2020-10-28 15:11:47,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:11:47,770 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 74 [2020-10-28 15:11:47,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:47,771 INFO L225 Difference]: With dead ends: 87 [2020-10-28 15:11:47,772 INFO L226 Difference]: Without dead ends: 81 [2020-10-28 15:11:47,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:11:47,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-28 15:11:47,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2020-10-28 15:11:47,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-28 15:11:47,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 97 transitions. [2020-10-28 15:11:47,786 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 97 transitions. Word has length 74 [2020-10-28 15:11:47,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:47,786 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 97 transitions. [2020-10-28 15:11:47,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:11:47,786 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 97 transitions. [2020-10-28 15:11:47,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-28 15:11:47,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:47,788 INFO L422 BasicCegarLoop]: trace histogram [20, 13, 13, 8, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:47,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 15:11:47,788 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:47,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:47,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1031594647, now seen corresponding path program 15 times [2020-10-28 15:11:47,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:47,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [572006848] [2020-10-28 15:11:47,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:47,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:47,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:47,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:47,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:48,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:48,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:48,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:48,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:48,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:49,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:49,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:49,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:52,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:52,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 15:11:52,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 15:11:52,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 15:11:52,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:52,804 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:52,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:11:52,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 15:11:52,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 15:11:52,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:52,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:52,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:52,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:52,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:52,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:52,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:52,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:11:52,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:52,952 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:52,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:52,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:52,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:52,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:52,962 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 346 proven. 136 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2020-10-28 15:11:52,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [572006848] [2020-10-28 15:11:52,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:52,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 15:11:52,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726950937] [2020-10-28 15:11:52,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 15:11:52,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:52,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 15:11:52,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:11:52,964 INFO L87 Difference]: Start difference. First operand 79 states and 97 transitions. Second operand 12 states. [2020-10-28 15:11:53,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:53,484 INFO L93 Difference]: Finished difference Result 142 states and 180 transitions. [2020-10-28 15:11:53,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 15:11:53,484 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 78 [2020-10-28 15:11:53,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:53,485 INFO L225 Difference]: With dead ends: 142 [2020-10-28 15:11:53,485 INFO L226 Difference]: Without dead ends: 83 [2020-10-28 15:11:53,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:11:53,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-28 15:11:53,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-28 15:11:53,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-28 15:11:53,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 102 transitions. [2020-10-28 15:11:53,496 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 102 transitions. Word has length 78 [2020-10-28 15:11:53,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:53,496 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 102 transitions. [2020-10-28 15:11:53,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 15:11:53,496 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 102 transitions. [2020-10-28 15:11:53,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 15:11:53,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:53,497 INFO L422 BasicCegarLoop]: trace histogram [21, 14, 14, 9, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:53,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 15:11:53,497 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:53,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:53,498 INFO L82 PathProgramCache]: Analyzing trace with hash 2047932978, now seen corresponding path program 16 times [2020-10-28 15:11:53,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:53,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [644002748] [2020-10-28 15:11:53,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:53,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:53,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:53,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:53,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:53,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:53,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:53,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:53,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:54,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:54,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:54,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:54,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:55,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:58,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:58,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-28 15:11:58,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 15:11:58,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 15:11:58,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:58,513 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:58,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:11:58,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 15:11:58,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 15:11:58,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:58,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:58,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:58,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:58,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:58,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:58,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:58,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:11:58,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:58,667 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:58,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:58,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:58,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:58,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:58,677 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 378 proven. 171 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2020-10-28 15:11:58,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [644002748] [2020-10-28 15:11:58,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:58,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 15:11:58,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215594252] [2020-10-28 15:11:58,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 15:11:58,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:58,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 15:11:58,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:11:58,679 INFO L87 Difference]: Start difference. First operand 83 states and 102 transitions. Second operand 13 states. [2020-10-28 15:11:59,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:59,258 INFO L93 Difference]: Finished difference Result 150 states and 190 transitions. [2020-10-28 15:11:59,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 15:11:59,258 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 82 [2020-10-28 15:11:59,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:59,259 INFO L225 Difference]: With dead ends: 150 [2020-10-28 15:11:59,260 INFO L226 Difference]: Without dead ends: 87 [2020-10-28 15:11:59,260 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-10-28 15:11:59,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-28 15:11:59,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-10-28 15:11:59,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-28 15:11:59,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 107 transitions. [2020-10-28 15:11:59,268 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 107 transitions. Word has length 82 [2020-10-28 15:11:59,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:59,269 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 107 transitions. [2020-10-28 15:11:59,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 15:11:59,269 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 107 transitions. [2020-10-28 15:11:59,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-28 15:11:59,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:59,270 INFO L422 BasicCegarLoop]: trace histogram [22, 15, 15, 10, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:59,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 15:11:59,270 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:59,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:59,270 INFO L82 PathProgramCache]: Analyzing trace with hash -899593605, now seen corresponding path program 17 times [2020-10-28 15:11:59,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:59,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [966467988] [2020-10-28 15:11:59,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:59,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:59,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:59,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:59,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:59,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:59,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:59,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:59,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:59,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:59,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:59,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:59,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:59,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:02,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:04,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:04,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-28 15:12:04,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 15:12:04,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 15:12:04,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:04,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:04,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:12:04,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:12:04,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 15:12:04,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:04,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:12:04,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:04,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:04,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:04,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:12:04,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:12:04,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:12:04,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:04,426 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:04,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:12:04,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:12:04,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:12:04,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:04,436 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 302 proven. 92 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2020-10-28 15:12:04,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [966467988] [2020-10-28 15:12:04,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:12:04,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 15:12:04,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011324604] [2020-10-28 15:12:04,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 15:12:04,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:12:04,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 15:12:04,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:12:04,438 INFO L87 Difference]: Start difference. First operand 87 states and 107 transitions. Second operand 13 states. [2020-10-28 15:12:04,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:12:04,949 INFO L93 Difference]: Finished difference Result 160 states and 203 transitions. [2020-10-28 15:12:04,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 15:12:04,952 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 86 [2020-10-28 15:12:04,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:12:04,953 INFO L225 Difference]: With dead ends: 160 [2020-10-28 15:12:04,953 INFO L226 Difference]: Without dead ends: 93 [2020-10-28 15:12:04,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-10-28 15:12:04,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-28 15:12:04,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-10-28 15:12:04,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-28 15:12:04,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 113 transitions. [2020-10-28 15:12:04,962 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 113 transitions. Word has length 86 [2020-10-28 15:12:04,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:12:04,963 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 113 transitions. [2020-10-28 15:12:04,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 15:12:04,963 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 113 transitions. [2020-10-28 15:12:04,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-28 15:12:04,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:12:04,964 INFO L422 BasicCegarLoop]: trace histogram [25, 15, 15, 10, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:12:04,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 15:12:04,964 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:12:04,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:12:04,965 INFO L82 PathProgramCache]: Analyzing trace with hash -2022644892, now seen corresponding path program 18 times [2020-10-28 15:12:04,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:12:04,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [262211350] [2020-10-28 15:12:04,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:12:04,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:04,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:05,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:05,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:05,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:05,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:05,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:05,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:05,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:06,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:07,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:07,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:07,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:09,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:09,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-28 15:12:09,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 15:12:09,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 15:12:09,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:09,981 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:09,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 15:12:09,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:12:09,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-28 15:12:09,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:10,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:12:10,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:10,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:10,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:10,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:12:10,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:12:10,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:12:10,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:10,316 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:10,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:12:10,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:12:10,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:12:10,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:10,327 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 382 proven. 348 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-10-28 15:12:10,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [262211350] [2020-10-28 15:12:10,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:12:10,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 15:12:10,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493784878] [2020-10-28 15:12:10,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 15:12:10,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:12:10,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 15:12:10,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:12:10,331 INFO L87 Difference]: Start difference. First operand 93 states and 113 transitions. Second operand 21 states. [2020-10-28 15:12:11,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:12:11,324 INFO L93 Difference]: Finished difference Result 176 states and 224 transitions. [2020-10-28 15:12:11,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 15:12:11,325 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 92 [2020-10-28 15:12:11,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:12:11,327 INFO L225 Difference]: With dead ends: 176 [2020-10-28 15:12:11,327 INFO L226 Difference]: Without dead ends: 109 [2020-10-28 15:12:11,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 15:12:11,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-28 15:12:11,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2020-10-28 15:12:11,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-28 15:12:11,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 129 transitions. [2020-10-28 15:12:11,336 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 129 transitions. Word has length 92 [2020-10-28 15:12:11,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:12:11,336 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 129 transitions. [2020-10-28 15:12:11,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 15:12:11,337 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 129 transitions. [2020-10-28 15:12:11,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-28 15:12:11,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:12:11,338 INFO L422 BasicCegarLoop]: trace histogram [33, 18, 15, 15, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:12:11,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 15:12:11,338 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:12:11,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:12:11,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1332224132, now seen corresponding path program 19 times [2020-10-28 15:12:11,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:12:11,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [777668059] [2020-10-28 15:12:11,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:12:11,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:11,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:11,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:11,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:11,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:11,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:11,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:11,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:11,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:13,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:13,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:14,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:14,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:16,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:16,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-28 15:12:16,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 15:12:16,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 15:12:16,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:16,352 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:16,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 15:12:16,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 15:12:16,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 15:12:16,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:16,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:12:16,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:16,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:16,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:16,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:12:16,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:12:16,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:12:16,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:16,524 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:16,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:12:16,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:12:16,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:12:16,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:16,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1299 backedges. 751 proven. 210 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-10-28 15:12:16,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [777668059] [2020-10-28 15:12:16,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:12:16,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 15:12:16,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794519826] [2020-10-28 15:12:16,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 15:12:16,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:12:16,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 15:12:16,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:12:16,536 INFO L87 Difference]: Start difference. First operand 109 states and 129 transitions. Second operand 14 states. [2020-10-28 15:12:17,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:12:17,180 INFO L93 Difference]: Finished difference Result 180 states and 222 transitions. [2020-10-28 15:12:17,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 15:12:17,181 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 108 [2020-10-28 15:12:17,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:12:17,183 INFO L225 Difference]: With dead ends: 180 [2020-10-28 15:12:17,183 INFO L226 Difference]: Without dead ends: 113 [2020-10-28 15:12:17,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2020-10-28 15:12:17,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-28 15:12:17,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2020-10-28 15:12:17,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-28 15:12:17,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 134 transitions. [2020-10-28 15:12:17,193 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 134 transitions. Word has length 108 [2020-10-28 15:12:17,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:12:17,194 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 134 transitions. [2020-10-28 15:12:17,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 15:12:17,194 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 134 transitions. [2020-10-28 15:12:17,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-28 15:12:17,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:12:17,195 INFO L422 BasicCegarLoop]: trace histogram [34, 18, 16, 16, 11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:12:17,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 15:12:17,195 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:12:17,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:12:17,196 INFO L82 PathProgramCache]: Analyzing trace with hash -318735675, now seen corresponding path program 20 times [2020-10-28 15:12:17,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:12:17,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [748500823] [2020-10-28 15:12:17,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:12:17,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:17,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:17,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:17,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:17,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:17,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:18,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:18,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:18,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:19,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:19,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:19,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:20,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:20,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:22,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:22,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-28 15:12:22,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 15:12:22,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 15:12:22,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:22,211 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:22,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 15:12:22,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 15:12:22,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 15:12:22,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:22,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:12:22,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:22,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:22,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:22,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:12:22,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:12:22,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:12:22,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:22,405 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:22,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:12:22,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:12:22,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:12:22,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:22,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 805 proven. 253 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-10-28 15:12:22,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [748500823] [2020-10-28 15:12:22,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:12:22,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 15:12:22,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37964873] [2020-10-28 15:12:22,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 15:12:22,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:12:22,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 15:12:22,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:12:22,422 INFO L87 Difference]: Start difference. First operand 113 states and 134 transitions. Second operand 15 states. [2020-10-28 15:12:23,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:12:23,165 INFO L93 Difference]: Finished difference Result 188 states and 232 transitions. [2020-10-28 15:12:23,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 15:12:23,167 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 112 [2020-10-28 15:12:23,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:12:23,169 INFO L225 Difference]: With dead ends: 188 [2020-10-28 15:12:23,169 INFO L226 Difference]: Without dead ends: 117 [2020-10-28 15:12:23,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2020-10-28 15:12:23,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-28 15:12:23,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2020-10-28 15:12:23,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-28 15:12:23,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 139 transitions. [2020-10-28 15:12:23,179 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 139 transitions. Word has length 112 [2020-10-28 15:12:23,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:12:23,179 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 139 transitions. [2020-10-28 15:12:23,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 15:12:23,179 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 139 transitions. [2020-10-28 15:12:23,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-28 15:12:23,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:12:23,181 INFO L422 BasicCegarLoop]: trace histogram [35, 18, 17, 17, 12, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:12:23,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 15:12:23,181 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:12:23,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:12:23,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1101547918, now seen corresponding path program 21 times [2020-10-28 15:12:23,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:12:23,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792480581] [2020-10-28 15:12:23,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:12:23,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:23,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:23,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:23,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:23,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:23,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:23,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:23,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:23,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:23,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:23,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:24,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:28,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:28,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-28 15:12:28,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 15:12:28,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 15:12:28,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:28,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:28,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 15:12:28,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 15:12:28,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-28 15:12:28,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:28,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:12:28,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:28,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:28,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:28,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:12:28,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:12:28,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:12:28,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:28,418 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:28,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:12:28,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:12:28,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:12:28,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:28,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1497 backedges. 859 proven. 300 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-10-28 15:12:28,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792480581] [2020-10-28 15:12:28,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:12:28,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 15:12:28,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421158456] [2020-10-28 15:12:28,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 15:12:28,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:12:28,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 15:12:28,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 15:12:28,434 INFO L87 Difference]: Start difference. First operand 117 states and 139 transitions. Second operand 16 states. [2020-10-28 15:12:29,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:12:29,281 INFO L93 Difference]: Finished difference Result 196 states and 242 transitions. [2020-10-28 15:12:29,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 15:12:29,281 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 116 [2020-10-28 15:12:29,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:12:29,283 INFO L225 Difference]: With dead ends: 196 [2020-10-28 15:12:29,283 INFO L226 Difference]: Without dead ends: 121 [2020-10-28 15:12:29,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2020-10-28 15:12:29,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-28 15:12:29,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2020-10-28 15:12:29,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-28 15:12:29,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 144 transitions. [2020-10-28 15:12:29,294 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 144 transitions. Word has length 116 [2020-10-28 15:12:29,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:12:29,294 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 144 transitions. [2020-10-28 15:12:29,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 15:12:29,294 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 144 transitions. [2020-10-28 15:12:29,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-28 15:12:29,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:12:29,296 INFO L422 BasicCegarLoop]: trace histogram [36, 18, 18, 18, 13, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:12:29,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 15:12:29,296 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:12:29,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:12:29,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1288276951, now seen corresponding path program 22 times [2020-10-28 15:12:29,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:12:29,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [452398082] [2020-10-28 15:12:29,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:12:29,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:29,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:29,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:29,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:29,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:29,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:29,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:29,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:29,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:29,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:29,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:29,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:32,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:32,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:33,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:34,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:34,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-28 15:12:34,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 15:12:34,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 15:12:34,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:34,317 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:34,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 15:12:34,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 15:12:34,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 15:12:34,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:34,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:12:34,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:34,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:34,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:34,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:12:34,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:12:34,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:12:34,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:34,545 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:34,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:12:34,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:12:34,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:12:34,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:34,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1602 backedges. 913 proven. 351 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-10-28 15:12:34,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [452398082] [2020-10-28 15:12:34,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:12:34,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 15:12:34,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598068497] [2020-10-28 15:12:34,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 15:12:34,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:12:34,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 15:12:34,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:12:34,558 INFO L87 Difference]: Start difference. First operand 121 states and 144 transitions. Second operand 17 states. [2020-10-28 15:12:35,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:12:35,456 INFO L93 Difference]: Finished difference Result 204 states and 252 transitions. [2020-10-28 15:12:35,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 15:12:35,456 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 120 [2020-10-28 15:12:35,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:12:35,457 INFO L225 Difference]: With dead ends: 204 [2020-10-28 15:12:35,458 INFO L226 Difference]: Without dead ends: 125 [2020-10-28 15:12:35,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2020-10-28 15:12:35,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-28 15:12:35,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2020-10-28 15:12:35,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-28 15:12:35,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 149 transitions. [2020-10-28 15:12:35,466 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 149 transitions. Word has length 120 [2020-10-28 15:12:35,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:12:35,467 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 149 transitions. [2020-10-28 15:12:35,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 15:12:35,467 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 149 transitions. [2020-10-28 15:12:35,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-28 15:12:35,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:12:35,468 INFO L422 BasicCegarLoop]: trace histogram [37, 19, 19, 18, 14, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:12:35,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 15:12:35,469 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:12:35,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:12:35,469 INFO L82 PathProgramCache]: Analyzing trace with hash -2055306848, now seen corresponding path program 23 times [2020-10-28 15:12:35,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:12:35,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114849919] [2020-10-28 15:12:35,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:12:35,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:35,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:35,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:35,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:35,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:35,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:35,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:35,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:35,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:39,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:39,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:39,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:39,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:40,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:40,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-28 15:12:40,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 15:12:40,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 15:12:40,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:40,491 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:40,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 15:12:40,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 15:12:40,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-28 15:12:40,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:40,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:12:40,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:40,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:40,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:40,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:12:40,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:12:40,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:12:40,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:40,754 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:40,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:12:40,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:12:40,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:12:40,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:40,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 967 proven. 406 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-10-28 15:12:40,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114849919] [2020-10-28 15:12:40,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:12:40,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 15:12:40,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124840048] [2020-10-28 15:12:40,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 15:12:40,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:12:40,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 15:12:40,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 15:12:40,774 INFO L87 Difference]: Start difference. First operand 125 states and 149 transitions. Second operand 18 states. [2020-10-28 15:12:41,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:12:41,687 INFO L93 Difference]: Finished difference Result 212 states and 262 transitions. [2020-10-28 15:12:41,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 15:12:41,688 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 124 [2020-10-28 15:12:41,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:12:41,689 INFO L225 Difference]: With dead ends: 212 [2020-10-28 15:12:41,689 INFO L226 Difference]: Without dead ends: 129 [2020-10-28 15:12:41,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 15:12:41,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-28 15:12:41,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2020-10-28 15:12:41,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-28 15:12:41,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 154 transitions. [2020-10-28 15:12:41,699 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 154 transitions. Word has length 124 [2020-10-28 15:12:41,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:12:41,700 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 154 transitions. [2020-10-28 15:12:41,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 15:12:41,700 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 154 transitions. [2020-10-28 15:12:41,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-28 15:12:41,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:12:41,701 INFO L422 BasicCegarLoop]: trace histogram [38, 20, 20, 18, 15, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:12:41,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 15:12:41,702 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:12:41,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:12:41,702 INFO L82 PathProgramCache]: Analyzing trace with hash -876516631, now seen corresponding path program 24 times [2020-10-28 15:12:41,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:12:41,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1393491762] [2020-10-28 15:12:41,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:12:41,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:41,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:41,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:42,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:42,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:42,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:42,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:42,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:42,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:42,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:42,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:42,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:42,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:43,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:43,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:46,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:46,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-28 15:12:46,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 15:12:46,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 15:12:46,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:46,723 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:46,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 15:12:46,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:12:46,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-28 15:12:46,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:47,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:12:47,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:47,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:47,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:47,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:12:47,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:12:47,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:12:47,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:47,325 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:47,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:12:47,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:12:47,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:12:47,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:47,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1824 backedges. 832 proven. 692 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2020-10-28 15:12:47,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1393491762] [2020-10-28 15:12:47,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:12:47,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 15:12:47,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372116894] [2020-10-28 15:12:47,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 15:12:47,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:12:47,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 15:12:47,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 15:12:47,341 INFO L87 Difference]: Start difference. First operand 129 states and 154 transitions. Second operand 29 states. [2020-10-28 15:12:49,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:12:49,092 INFO L93 Difference]: Finished difference Result 232 states and 290 transitions. [2020-10-28 15:12:49,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 15:12:49,093 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 128 [2020-10-28 15:12:49,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:12:49,094 INFO L225 Difference]: With dead ends: 232 [2020-10-28 15:12:49,095 INFO L226 Difference]: Without dead ends: 145 [2020-10-28 15:12:49,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2020-10-28 15:12:49,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-28 15:12:49,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2020-10-28 15:12:49,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-28 15:12:49,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 170 transitions. [2020-10-28 15:12:49,110 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 170 transitions. Word has length 128 [2020-10-28 15:12:49,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:12:49,111 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 170 transitions. [2020-10-28 15:12:49,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 15:12:49,111 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 170 transitions. [2020-10-28 15:12:49,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-28 15:12:49,112 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:12:49,112 INFO L422 BasicCegarLoop]: trace histogram [46, 26, 20, 20, 15, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:12:49,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 15:12:49,113 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:12:49,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:12:49,114 INFO L82 PathProgramCache]: Analyzing trace with hash -438945023, now seen corresponding path program 25 times [2020-10-28 15:12:49,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:12:49,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381687969] [2020-10-28 15:12:49,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:12:49,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:49,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:49,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:49,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:49,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:49,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:49,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:50,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:50,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:50,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:50,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:53,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:53,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:54,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:54,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-28 15:12:54,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 15:12:54,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 15:12:54,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:54,146 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:54,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 15:12:54,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-28 15:12:54,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-28 15:12:54,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:54,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:12:54,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:54,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:54,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:54,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:12:54,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:12:54,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:12:54,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:54,425 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:54,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:12:54,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:12:54,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:12:54,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:54,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2496 backedges. 1349 proven. 465 refuted. 0 times theorem prover too weak. 682 trivial. 0 not checked. [2020-10-28 15:12:54,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381687969] [2020-10-28 15:12:54,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:12:54,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 15:12:54,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845362993] [2020-10-28 15:12:54,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 15:12:54,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:12:54,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 15:12:54,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:12:54,443 INFO L87 Difference]: Start difference. First operand 145 states and 170 transitions. Second operand 19 states. [2020-10-28 15:12:55,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:12:55,415 INFO L93 Difference]: Finished difference Result 236 states and 288 transitions. [2020-10-28 15:12:55,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 15:12:55,416 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 144 [2020-10-28 15:12:55,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:12:55,417 INFO L225 Difference]: With dead ends: 236 [2020-10-28 15:12:55,417 INFO L226 Difference]: Without dead ends: 149 [2020-10-28 15:12:55,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 15:12:55,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-28 15:12:55,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2020-10-28 15:12:55,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-28 15:12:55,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 175 transitions. [2020-10-28 15:12:55,428 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 175 transitions. Word has length 144 [2020-10-28 15:12:55,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:12:55,429 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 175 transitions. [2020-10-28 15:12:55,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 15:12:55,429 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 175 transitions. [2020-10-28 15:12:55,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-28 15:12:55,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:12:55,431 INFO L422 BasicCegarLoop]: trace histogram [47, 26, 21, 21, 16, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:12:55,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 15:12:55,431 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:12:55,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:12:55,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1558940618, now seen corresponding path program 26 times [2020-10-28 15:12:55,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:12:55,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1520560909] [2020-10-28 15:12:55,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:12:55,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:55,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:55,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:55,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:55,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:55,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:55,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:56,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:56,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:56,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:56,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:57,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:57,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:58,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:58,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:59,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:00,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:13:00,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-28 15:13:00,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 15:13:00,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 15:13:00,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:13:00,455 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:13:00,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 15:13:00,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-28 15:13:00,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-28 15:13:00,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:13:00,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:13:00,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:00,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:00,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:13:00,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:13:00,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:13:00,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:13:00,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:13:00,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:13:00,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:13:00,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:13:00,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:13:00,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:13:00,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2629 backedges. 1419 proven. 528 refuted. 0 times theorem prover too weak. 682 trivial. 0 not checked. [2020-10-28 15:13:00,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1520560909] [2020-10-28 15:13:00,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:13:00,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 15:13:00,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325026948] [2020-10-28 15:13:00,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 15:13:00,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:13:00,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 15:13:00,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 15:13:00,790 INFO L87 Difference]: Start difference. First operand 149 states and 175 transitions. Second operand 20 states. [2020-10-28 15:13:01,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:13:01,827 INFO L93 Difference]: Finished difference Result 244 states and 298 transitions. [2020-10-28 15:13:01,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 15:13:01,827 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 148 [2020-10-28 15:13:01,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:13:01,828 INFO L225 Difference]: With dead ends: 244 [2020-10-28 15:13:01,829 INFO L226 Difference]: Without dead ends: 153 [2020-10-28 15:13:01,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 15:13:01,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-28 15:13:01,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2020-10-28 15:13:01,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-28 15:13:01,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 180 transitions. [2020-10-28 15:13:01,840 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 180 transitions. Word has length 148 [2020-10-28 15:13:01,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:13:01,841 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 180 transitions. [2020-10-28 15:13:01,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 15:13:01,841 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 180 transitions. [2020-10-28 15:13:01,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-28 15:13:01,842 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:13:01,843 INFO L422 BasicCegarLoop]: trace histogram [48, 26, 22, 22, 17, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:13:01,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 15:13:01,843 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:13:01,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:13:01,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1276555245, now seen corresponding path program 27 times [2020-10-28 15:13:01,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:13:01,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1087023608] [2020-10-28 15:13:01,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:13:01,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:01,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:01,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:02,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:02,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:02,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:02,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:02,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:02,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:02,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:02,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:03,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:03,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:04,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:05,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:06,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:06,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:13:06,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-10-28 15:13:06,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 15:13:06,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 15:13:06,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:13:06,867 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:13:06,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 15:13:06,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-28 15:13:06,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-28 15:13:06,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:13:07,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:13:07,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:07,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:07,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:13:07,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:13:07,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:13:07,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:13:07,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:13:07,203 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:13:07,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:13:07,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:13:07,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:13:07,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:13:07,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2766 backedges. 1489 proven. 595 refuted. 0 times theorem prover too weak. 682 trivial. 0 not checked. [2020-10-28 15:13:07,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1087023608] [2020-10-28 15:13:07,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:13:07,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 15:13:07,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724056389] [2020-10-28 15:13:07,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 15:13:07,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:13:07,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 15:13:07,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:13:07,223 INFO L87 Difference]: Start difference. First operand 153 states and 180 transitions. Second operand 21 states. [2020-10-28 15:13:08,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:13:08,343 INFO L93 Difference]: Finished difference Result 252 states and 308 transitions. [2020-10-28 15:13:08,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 15:13:08,343 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 152 [2020-10-28 15:13:08,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:13:08,345 INFO L225 Difference]: With dead ends: 252 [2020-10-28 15:13:08,347 INFO L226 Difference]: Without dead ends: 157 [2020-10-28 15:13:08,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 15:13:08,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-28 15:13:08,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2020-10-28 15:13:08,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-28 15:13:08,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 185 transitions. [2020-10-28 15:13:08,364 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 185 transitions. Word has length 152 [2020-10-28 15:13:08,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:13:08,365 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 185 transitions. [2020-10-28 15:13:08,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 15:13:08,365 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 185 transitions. [2020-10-28 15:13:08,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-28 15:13:08,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:13:08,367 INFO L422 BasicCegarLoop]: trace histogram [49, 26, 23, 23, 18, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:13:08,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 15:13:08,367 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:13:08,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:13:08,368 INFO L82 PathProgramCache]: Analyzing trace with hash 308922332, now seen corresponding path program 28 times [2020-10-28 15:13:08,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:13:08,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909703682] [2020-10-28 15:13:08,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:13:08,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:08,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:08,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:08,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:08,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:08,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:08,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:08,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:09,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:09,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:10,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:11,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:11,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:11,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:11,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:12,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:12,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:13,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:13:13,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-28 15:13:13,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 15:13:13,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 15:13:13,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:13:13,395 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:13:13,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 15:13:13,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-28 15:13:13,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-28 15:13:13,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:13:13,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:13:13,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:13,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:13,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:13:13,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:13:13,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:13:13,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:13:13,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:13:13,740 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:13:13,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:13:13,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:13:13,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:13:13,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:13:13,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2907 backedges. 1559 proven. 666 refuted. 0 times theorem prover too weak. 682 trivial. 0 not checked. [2020-10-28 15:13:13,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909703682] [2020-10-28 15:13:13,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:13:13,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 15:13:13,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536342545] [2020-10-28 15:13:13,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 15:13:13,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:13:13,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 15:13:13,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 15:13:13,759 INFO L87 Difference]: Start difference. First operand 157 states and 185 transitions. Second operand 22 states. [2020-10-28 15:13:15,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:13:15,031 INFO L93 Difference]: Finished difference Result 260 states and 318 transitions. [2020-10-28 15:13:15,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 15:13:15,031 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 156 [2020-10-28 15:13:15,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:13:15,032 INFO L225 Difference]: With dead ends: 260 [2020-10-28 15:13:15,033 INFO L226 Difference]: Without dead ends: 161 [2020-10-28 15:13:15,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 15:13:15,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-28 15:13:15,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2020-10-28 15:13:15,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-28 15:13:15,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 190 transitions. [2020-10-28 15:13:15,049 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 190 transitions. Word has length 156 [2020-10-28 15:13:15,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:13:15,050 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 190 transitions. [2020-10-28 15:13:15,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 15:13:15,050 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 190 transitions. [2020-10-28 15:13:15,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-10-28 15:13:15,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:13:15,051 INFO L422 BasicCegarLoop]: trace histogram [50, 26, 24, 24, 19, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:13:15,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 15:13:15,051 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:13:15,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:13:15,052 INFO L82 PathProgramCache]: Analyzing trace with hash -924372187, now seen corresponding path program 29 times [2020-10-28 15:13:15,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:13:15,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1018305047] [2020-10-28 15:13:15,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:13:15,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:15,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:15,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:15,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:15,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:15,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:15,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:15,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:15,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:15,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:15,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:16,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:16,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:16,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:18,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:19,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:20,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:13:20,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-28 15:13:20,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 15:13:20,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 15:13:20,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:13:20,081 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:13:20,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 15:13:20,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-28 15:13:20,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-28 15:13:20,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:13:20,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:13:20,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:20,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:20,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:13:20,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:13:20,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:13:20,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:13:20,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:13:20,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:13:20,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:13:20,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:13:20,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:13:20,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:13:20,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3052 backedges. 1629 proven. 741 refuted. 0 times theorem prover too weak. 682 trivial. 0 not checked. [2020-10-28 15:13:20,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1018305047] [2020-10-28 15:13:20,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:13:20,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 15:13:20,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800937217] [2020-10-28 15:13:20,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 15:13:20,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:13:20,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 15:13:20,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 15:13:20,494 INFO L87 Difference]: Start difference. First operand 161 states and 190 transitions. Second operand 23 states. [2020-10-28 15:13:21,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:13:21,845 INFO L93 Difference]: Finished difference Result 268 states and 328 transitions. [2020-10-28 15:13:21,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 15:13:21,845 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 160 [2020-10-28 15:13:21,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:13:21,847 INFO L225 Difference]: With dead ends: 268 [2020-10-28 15:13:21,847 INFO L226 Difference]: Without dead ends: 165 [2020-10-28 15:13:21,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 15:13:21,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-28 15:13:21,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2020-10-28 15:13:21,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-28 15:13:21,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 195 transitions. [2020-10-28 15:13:21,858 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 195 transitions. Word has length 160 [2020-10-28 15:13:21,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:13:21,858 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 195 transitions. [2020-10-28 15:13:21,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 15:13:21,859 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 195 transitions. [2020-10-28 15:13:21,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-10-28 15:13:21,859 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:13:21,860 INFO L422 BasicCegarLoop]: trace histogram [51, 26, 25, 25, 20, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:13:21,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 15:13:21,860 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:13:21,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:13:21,860 INFO L82 PathProgramCache]: Analyzing trace with hash -524561938, now seen corresponding path program 30 times [2020-10-28 15:13:21,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:13:21,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [840358063] [2020-10-28 15:13:21,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:13:21,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:21,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:21,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:22,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:22,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:22,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:22,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:22,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:22,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:22,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:22,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:23,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:24,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:25,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:25,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:26,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:13:26,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-28 15:13:26,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 15:13:26,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 15:13:26,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:13:26,888 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:13:26,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 15:13:26,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-28 15:13:26,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-28 15:13:26,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:13:27,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:13:27,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:27,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:27,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:13:27,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:13:27,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:13:27,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:13:27,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:13:27,335 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:13:27,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:13:27,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:13:27,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:13:27,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:13:27,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3201 backedges. 1699 proven. 820 refuted. 0 times theorem prover too weak. 682 trivial. 0 not checked. [2020-10-28 15:13:27,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [840358063] [2020-10-28 15:13:27,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:13:27,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 15:13:27,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068792675] [2020-10-28 15:13:27,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 15:13:27,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:13:27,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 15:13:27,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 15:13:27,360 INFO L87 Difference]: Start difference. First operand 165 states and 195 transitions. Second operand 24 states. [2020-10-28 15:13:28,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:13:28,792 INFO L93 Difference]: Finished difference Result 276 states and 338 transitions. [2020-10-28 15:13:28,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 15:13:28,797 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 164 [2020-10-28 15:13:28,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:13:28,798 INFO L225 Difference]: With dead ends: 276 [2020-10-28 15:13:28,798 INFO L226 Difference]: Without dead ends: 169 [2020-10-28 15:13:28,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 15:13:28,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-28 15:13:28,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2020-10-28 15:13:28,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-28 15:13:28,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 200 transitions. [2020-10-28 15:13:28,810 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 200 transitions. Word has length 164 [2020-10-28 15:13:28,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:13:28,810 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 200 transitions. [2020-10-28 15:13:28,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 15:13:28,810 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 200 transitions. [2020-10-28 15:13:28,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-28 15:13:28,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:13:28,811 INFO L422 BasicCegarLoop]: trace histogram [52, 26, 26, 26, 21, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:13:28,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 15:13:28,812 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:13:28,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:13:28,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1407065033, now seen corresponding path program 31 times [2020-10-28 15:13:28,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:13:28,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [379061528] [2020-10-28 15:13:28,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:13:28,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:28,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:28,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:29,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:29,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:29,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:29,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:30,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:30,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:30,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:30,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:30,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:33,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:13:33,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-10-28 15:13:33,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 15:13:33,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 15:13:33,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:13:33,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:13:33,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 15:13:33,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-28 15:13:33,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-28 15:13:33,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:13:34,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:13:34,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:34,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:34,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:13:34,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:13:34,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:13:34,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:13:34,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:13:34,368 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:13:34,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:13:34,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:13:34,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:13:34,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:13:34,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3354 backedges. 1769 proven. 903 refuted. 0 times theorem prover too weak. 682 trivial. 0 not checked. [2020-10-28 15:13:34,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [379061528] [2020-10-28 15:13:34,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:13:34,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 15:13:34,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590581175] [2020-10-28 15:13:34,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 15:13:34,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:13:34,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 15:13:34,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 15:13:34,421 INFO L87 Difference]: Start difference. First operand 169 states and 200 transitions. Second operand 25 states. [2020-10-28 15:13:35,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:13:35,893 INFO L93 Difference]: Finished difference Result 284 states and 348 transitions. [2020-10-28 15:13:35,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 15:13:35,893 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 168 [2020-10-28 15:13:35,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:13:35,895 INFO L225 Difference]: With dead ends: 284 [2020-10-28 15:13:35,895 INFO L226 Difference]: Without dead ends: 173 [2020-10-28 15:13:35,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2020-10-28 15:13:35,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-28 15:13:35,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2020-10-28 15:13:35,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-28 15:13:35,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 205 transitions. [2020-10-28 15:13:35,907 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 205 transitions. Word has length 168 [2020-10-28 15:13:35,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:13:35,907 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 205 transitions. [2020-10-28 15:13:35,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 15:13:35,908 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 205 transitions. [2020-10-28 15:13:35,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-10-28 15:13:35,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:13:35,909 INFO L422 BasicCegarLoop]: trace histogram [53, 27, 27, 26, 22, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:13:35,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 15:13:35,909 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:13:35,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:13:35,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1446226432, now seen corresponding path program 32 times [2020-10-28 15:13:35,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:13:35,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1861998213] [2020-10-28 15:13:35,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:13:35,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:35,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:35,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:36,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:36,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:36,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:36,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:36,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:36,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:36,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:38,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:38,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:38,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:38,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:39,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:39,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:40,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:40,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:13:40,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 182 [2020-10-28 15:13:40,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 15:13:40,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 15:13:40,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:13:40,935 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:13:40,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-28 15:13:40,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:13:40,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-28 15:13:40,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:13:41,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:13:41,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:41,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:41,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:13:41,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:13:41,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:13:41,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:13:41,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:13:41,987 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:13:41,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:13:41,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:13:41,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:13:41,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:13:42,021 INFO L134 CoverageAnalysis]: Checked inductivity of 3511 backedges. 1561 proven. 1422 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2020-10-28 15:13:42,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1861998213] [2020-10-28 15:13:42,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:13:42,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-28 15:13:42,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331507002] [2020-10-28 15:13:42,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-28 15:13:42,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:13:42,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-28 15:13:42,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 15:13:42,024 INFO L87 Difference]: Start difference. First operand 173 states and 205 transitions. Second operand 40 states. [2020-10-28 15:13:44,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:13:44,895 INFO L93 Difference]: Finished difference Result 310 states and 385 transitions. [2020-10-28 15:13:44,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-28 15:13:44,896 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 172 [2020-10-28 15:13:44,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:13:44,901 INFO L225 Difference]: With dead ends: 310 [2020-10-28 15:13:44,901 INFO L226 Difference]: Without dead ends: 195 [2020-10-28 15:13:44,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2020-10-28 15:13:44,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-28 15:13:44,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2020-10-28 15:13:44,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-10-28 15:13:44,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 227 transitions. [2020-10-28 15:13:44,915 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 227 transitions. Word has length 172 [2020-10-28 15:13:44,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:13:44,915 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 227 transitions. [2020-10-28 15:13:44,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-28 15:13:44,915 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 227 transitions. [2020-10-28 15:13:44,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-10-28 15:13:44,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:13:44,917 INFO L422 BasicCegarLoop]: trace histogram [64, 37, 27, 27, 22, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:13:44,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 15:13:44,917 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:13:44,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:13:44,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1803259969, now seen corresponding path program 33 times [2020-10-28 15:13:44,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:13:44,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1132140642] [2020-10-28 15:13:44,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:13:44,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:44,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:45,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:45,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:45,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:45,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:45,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:45,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:45,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:45,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:45,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:45,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:46,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:46,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:46,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:47,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:47,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:48,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:49,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:49,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:13:49,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 204 [2020-10-28 15:13:49,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-28 15:13:49,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 15:13:49,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:13:49,948 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:13:49,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 15:13:49,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-28 15:13:49,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-28 15:13:49,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:13:50,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:13:50,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:50,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:50,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:13:50,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:13:50,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:13:50,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:13:50,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:13:50,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:13:50,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:13:50,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:13:50,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:13:50,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:13:50,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4798 backedges. 2444 proven. 990 refuted. 0 times theorem prover too weak. 1364 trivial. 0 not checked. [2020-10-28 15:13:50,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1132140642] [2020-10-28 15:13:50,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:13:50,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 15:13:50,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859757400] [2020-10-28 15:13:50,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 15:13:50,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:13:50,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 15:13:50,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 15:13:50,465 INFO L87 Difference]: Start difference. First operand 195 states and 227 transitions. Second operand 26 states. [2020-10-28 15:13:51,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:13:51,988 INFO L93 Difference]: Finished difference Result 314 states and 380 transitions. [2020-10-28 15:13:51,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 15:13:51,991 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 194 [2020-10-28 15:13:51,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:13:51,992 INFO L225 Difference]: With dead ends: 314 [2020-10-28 15:13:51,993 INFO L226 Difference]: Without dead ends: 199 [2020-10-28 15:13:51,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2020-10-28 15:13:51,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-28 15:13:52,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2020-10-28 15:13:52,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-28 15:13:52,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 232 transitions. [2020-10-28 15:13:52,005 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 232 transitions. Word has length 194 [2020-10-28 15:13:52,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:13:52,006 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 232 transitions. [2020-10-28 15:13:52,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 15:13:52,006 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 232 transitions. [2020-10-28 15:13:52,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-10-28 15:13:52,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:13:52,007 INFO L422 BasicCegarLoop]: trace histogram [65, 37, 28, 28, 23, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:13:52,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 15:13:52,007 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:13:52,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:13:52,008 INFO L82 PathProgramCache]: Analyzing trace with hash 962871562, now seen corresponding path program 34 times [2020-10-28 15:13:52,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:13:52,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1910904459] [2020-10-28 15:13:52,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:13:52,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:52,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:52,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:53,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:53,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:53,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:53,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:53,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:53,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:53,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:53,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:53,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:57,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:13:57,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 208 [2020-10-28 15:13:57,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 15:13:57,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 15:13:57,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:13:57,041 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:13:57,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 15:13:57,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-28 15:13:57,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-28 15:13:57,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:13:57,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:13:57,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:57,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:57,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:13:57,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:13:57,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:13:57,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:13:57,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:13:57,568 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:13:57,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:13:57,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:13:57,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:13:57,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:13:57,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4981 backedges. 2536 proven. 1081 refuted. 0 times theorem prover too weak. 1364 trivial. 0 not checked. [2020-10-28 15:13:57,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1910904459] [2020-10-28 15:13:57,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:13:57,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 15:13:57,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364151500] [2020-10-28 15:13:57,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 15:13:57,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:13:57,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 15:13:57,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 15:13:57,597 INFO L87 Difference]: Start difference. First operand 199 states and 232 transitions. Second operand 27 states. [2020-10-28 15:13:59,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:13:59,296 INFO L93 Difference]: Finished difference Result 322 states and 390 transitions. [2020-10-28 15:13:59,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 15:13:59,296 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 198 [2020-10-28 15:13:59,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:13:59,298 INFO L225 Difference]: With dead ends: 322 [2020-10-28 15:13:59,298 INFO L226 Difference]: Without dead ends: 203 [2020-10-28 15:13:59,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2020-10-28 15:13:59,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-28 15:13:59,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2020-10-28 15:13:59,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-10-28 15:13:59,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 237 transitions. [2020-10-28 15:13:59,313 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 237 transitions. Word has length 198 [2020-10-28 15:13:59,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:13:59,313 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 237 transitions. [2020-10-28 15:13:59,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 15:13:59,314 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 237 transitions. [2020-10-28 15:13:59,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-10-28 15:13:59,315 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:13:59,315 INFO L422 BasicCegarLoop]: trace histogram [66, 37, 29, 29, 24, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:13:59,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 15:13:59,316 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:13:59,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:13:59,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1903860397, now seen corresponding path program 35 times [2020-10-28 15:13:59,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:13:59,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1207478179] [2020-10-28 15:13:59,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:13:59,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:59,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:59,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:00,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:00,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:00,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:00,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:00,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:00,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:00,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:00,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:00,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:00,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:01,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:01,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:04,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:14:04,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 212 [2020-10-28 15:14:04,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 15:14:04,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 15:14:04,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:14:04,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:14:04,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 15:14:04,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-28 15:14:04,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-28 15:14:04,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:14:04,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:14:04,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:14:04,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:04,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:14:04,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:14:04,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:14:04,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 15:14:04,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:14:04,946 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:14:04,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:14:04,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:14:04,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:14:04,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:14:04,974 INFO L134 CoverageAnalysis]: Checked inductivity of 5168 backedges. 2628 proven. 1176 refuted. 0 times theorem prover too weak. 1364 trivial. 0 not checked. [2020-10-28 15:14:04,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1207478179] [2020-10-28 15:14:04,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:14:04,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 15:14:04,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211265327] [2020-10-28 15:14:04,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 15:14:04,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:14:04,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 15:14:04,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 15:14:04,975 INFO L87 Difference]: Start difference. First operand 203 states and 237 transitions. Second operand 28 states. [2020-10-28 15:14:06,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:14:06,755 INFO L93 Difference]: Finished difference Result 330 states and 400 transitions. [2020-10-28 15:14:06,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 15:14:06,755 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 202 [2020-10-28 15:14:06,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:14:06,757 INFO L225 Difference]: With dead ends: 330 [2020-10-28 15:14:06,757 INFO L226 Difference]: Without dead ends: 207 [2020-10-28 15:14:06,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2020-10-28 15:14:06,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-28 15:14:06,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2020-10-28 15:14:06,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-28 15:14:06,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 242 transitions. [2020-10-28 15:14:06,771 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 242 transitions. Word has length 202 [2020-10-28 15:14:06,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:14:06,771 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 242 transitions. [2020-10-28 15:14:06,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 15:14:06,771 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 242 transitions. [2020-10-28 15:14:06,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-10-28 15:14:06,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:14:06,773 INFO L422 BasicCegarLoop]: trace histogram [67, 37, 30, 30, 25, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:14:06,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-28 15:14:06,773 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:14:06,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:14:06,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1786330396, now seen corresponding path program 36 times [2020-10-28 15:14:06,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:14:06,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288427009] [2020-10-28 15:14:06,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:14:06,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:14:06,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:06,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:07,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:08,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:08,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:08,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:08,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:08,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:08,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:08,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:08,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:08,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:08,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:09,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:09,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:10,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:11,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:11,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:11,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:14:11,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 216 [2020-10-28 15:14:11,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-28 15:14:11,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 15:14:11,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:14:11,812 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:14:11,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 15:14:11,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-28 15:14:11,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-28 15:14:11,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:14:12,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:14:12,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:14:12,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:12,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:14:12,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:14:12,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:14:12,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:14:12,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:14:12,420 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:14:12,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:14:12,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:14:12,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:14:12,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:14:12,450 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 2720 proven. 1275 refuted. 0 times theorem prover too weak. 1364 trivial. 0 not checked. [2020-10-28 15:14:12,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288427009] [2020-10-28 15:14:12,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:14:12,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 15:14:12,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383625214] [2020-10-28 15:14:12,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 15:14:12,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:14:12,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 15:14:12,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 15:14:12,452 INFO L87 Difference]: Start difference. First operand 207 states and 242 transitions. Second operand 29 states. [2020-10-28 15:14:14,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:14:14,268 INFO L93 Difference]: Finished difference Result 338 states and 410 transitions. [2020-10-28 15:14:14,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 15:14:14,270 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 206 [2020-10-28 15:14:14,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:14:14,272 INFO L225 Difference]: With dead ends: 338 [2020-10-28 15:14:14,273 INFO L226 Difference]: Without dead ends: 211 [2020-10-28 15:14:14,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2020-10-28 15:14:14,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-28 15:14:14,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2020-10-28 15:14:14,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-10-28 15:14:14,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 247 transitions. [2020-10-28 15:14:14,288 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 247 transitions. Word has length 206 [2020-10-28 15:14:14,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:14:14,289 INFO L481 AbstractCegarLoop]: Abstraction has 211 states and 247 transitions. [2020-10-28 15:14:14,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 15:14:14,289 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 247 transitions. [2020-10-28 15:14:14,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-10-28 15:14:14,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:14:14,290 INFO L422 BasicCegarLoop]: trace histogram [68, 37, 31, 31, 26, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:14:14,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-28 15:14:14,290 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:14:14,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:14:14,291 INFO L82 PathProgramCache]: Analyzing trace with hash -172357531, now seen corresponding path program 37 times [2020-10-28 15:14:14,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:14:14,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1126688025] [2020-10-28 15:14:14,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:14:14,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:14:14,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:14,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:15,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:15,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:15,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:15,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:15,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:15,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:15,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:15,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:15,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:16,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:16,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:16,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:17,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:17,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:18,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:19,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:14:19,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 220 [2020-10-28 15:14:19,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-28 15:14:19,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 15:14:19,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:14:19,326 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:14:19,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-28 15:14:19,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-28 15:14:19,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-28 15:14:19,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:14:19,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:14:19,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:14:19,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:19,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:14:19,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:14:19,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:14:19,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:14:19,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:14:19,990 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:14:19,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:14:19,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:14:19,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:14:19,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:14:20,018 INFO L134 CoverageAnalysis]: Checked inductivity of 5554 backedges. 2812 proven. 1378 refuted. 0 times theorem prover too weak. 1364 trivial. 0 not checked. [2020-10-28 15:14:20,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1126688025] [2020-10-28 15:14:20,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:14:20,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-28 15:14:20,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148727232] [2020-10-28 15:14:20,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-28 15:14:20,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:14:20,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-28 15:14:20,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 15:14:20,020 INFO L87 Difference]: Start difference. First operand 211 states and 247 transitions. Second operand 30 states. [2020-10-28 15:14:22,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:14:22,105 INFO L93 Difference]: Finished difference Result 346 states and 420 transitions. [2020-10-28 15:14:22,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 15:14:22,105 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 210 [2020-10-28 15:14:22,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:14:22,107 INFO L225 Difference]: With dead ends: 346 [2020-10-28 15:14:22,107 INFO L226 Difference]: Without dead ends: 215 [2020-10-28 15:14:22,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2020-10-28 15:14:22,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-28 15:14:22,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2020-10-28 15:14:22,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-10-28 15:14:22,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 252 transitions. [2020-10-28 15:14:22,121 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 252 transitions. Word has length 210 [2020-10-28 15:14:22,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:14:22,122 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 252 transitions. [2020-10-28 15:14:22,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-28 15:14:22,122 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 252 transitions. [2020-10-28 15:14:22,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-10-28 15:14:22,123 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:14:22,124 INFO L422 BasicCegarLoop]: trace histogram [69, 37, 32, 32, 27, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:14:22,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-28 15:14:22,124 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:14:22,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:14:22,124 INFO L82 PathProgramCache]: Analyzing trace with hash 295831342, now seen corresponding path program 38 times [2020-10-28 15:14:22,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:14:22,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1469308617] [2020-10-28 15:14:22,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:14:22,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:14:22,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:22,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:23,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:23,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:23,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:23,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:23,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:23,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:24,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:24,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:24,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:24,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:25,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:27,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:14:27,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 224 [2020-10-28 15:14:27,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 15:14:27,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 15:14:27,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:14:27,157 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:14:27,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 15:14:27,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-28 15:14:27,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-28 15:14:27,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:14:27,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:14:27,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:14:27,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:27,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:14:27,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:14:27,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:14:27,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:14:27,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:14:27,862 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:14:27,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:14:27,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:14:27,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:14:27,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:14:27,892 INFO L134 CoverageAnalysis]: Checked inductivity of 5753 backedges. 2904 proven. 1485 refuted. 0 times theorem prover too weak. 1364 trivial. 0 not checked. [2020-10-28 15:14:27,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1469308617] [2020-10-28 15:14:27,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:14:27,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-28 15:14:27,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504061663] [2020-10-28 15:14:27,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-28 15:14:27,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:14:27,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-28 15:14:27,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 15:14:27,894 INFO L87 Difference]: Start difference. First operand 215 states and 252 transitions. Second operand 31 states. [2020-10-28 15:14:30,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:14:30,060 INFO L93 Difference]: Finished difference Result 354 states and 430 transitions. [2020-10-28 15:14:30,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 15:14:30,061 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 214 [2020-10-28 15:14:30,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:14:30,064 INFO L225 Difference]: With dead ends: 354 [2020-10-28 15:14:30,064 INFO L226 Difference]: Without dead ends: 219 [2020-10-28 15:14:30,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2020-10-28 15:14:30,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-28 15:14:30,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2020-10-28 15:14:30,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-10-28 15:14:30,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 257 transitions. [2020-10-28 15:14:30,079 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 257 transitions. Word has length 214 [2020-10-28 15:14:30,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:14:30,080 INFO L481 AbstractCegarLoop]: Abstraction has 219 states and 257 transitions. [2020-10-28 15:14:30,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-28 15:14:30,080 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 257 transitions. [2020-10-28 15:14:30,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-10-28 15:14:30,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:14:30,081 INFO L422 BasicCegarLoop]: trace histogram [70, 37, 33, 33, 28, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:14:30,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-28 15:14:30,082 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:14:30,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:14:30,082 INFO L82 PathProgramCache]: Analyzing trace with hash -395609737, now seen corresponding path program 39 times [2020-10-28 15:14:30,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:14:30,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1783995851] [2020-10-28 15:14:30,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:14:30,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:14:30,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:30,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:31,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:31,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:31,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:31,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:31,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:31,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:31,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:31,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:31,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:31,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:32,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:32,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:32,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:32,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:33,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:35,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:14:35,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 228 [2020-10-28 15:14:35,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-28 15:14:35,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-28 15:14:35,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:14:35,130 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:14:35,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 15:14:35,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-28 15:14:35,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-28 15:14:35,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:14:35,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:14:35,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:14:35,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:35,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:14:35,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:14:35,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:14:35,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:14:35,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:14:35,883 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:14:35,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:14:35,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:14:35,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:14:35,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:14:35,913 INFO L134 CoverageAnalysis]: Checked inductivity of 5956 backedges. 2996 proven. 1596 refuted. 0 times theorem prover too weak. 1364 trivial. 0 not checked. [2020-10-28 15:14:35,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1783995851] [2020-10-28 15:14:35,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:14:35,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-28 15:14:35,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218319827] [2020-10-28 15:14:35,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-28 15:14:35,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:14:35,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-28 15:14:35,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 15:14:35,915 INFO L87 Difference]: Start difference. First operand 219 states and 257 transitions. Second operand 32 states. [2020-10-28 15:14:38,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:14:38,197 INFO L93 Difference]: Finished difference Result 362 states and 440 transitions. [2020-10-28 15:14:38,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 15:14:38,198 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 218 [2020-10-28 15:14:38,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:14:38,200 INFO L225 Difference]: With dead ends: 362 [2020-10-28 15:14:38,201 INFO L226 Difference]: Without dead ends: 223 [2020-10-28 15:14:38,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2020-10-28 15:14:38,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-28 15:14:38,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2020-10-28 15:14:38,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-10-28 15:14:38,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 262 transitions. [2020-10-28 15:14:38,215 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 262 transitions. Word has length 218 [2020-10-28 15:14:38,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:14:38,215 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 262 transitions. [2020-10-28 15:14:38,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-28 15:14:38,215 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 262 transitions. [2020-10-28 15:14:38,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-10-28 15:14:38,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:14:38,217 INFO L422 BasicCegarLoop]: trace histogram [71, 37, 34, 34, 29, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:14:38,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-28 15:14:38,217 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:14:38,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:14:38,217 INFO L82 PathProgramCache]: Analyzing trace with hash 2100338496, now seen corresponding path program 40 times [2020-10-28 15:14:38,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:14:38,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1950362285] [2020-10-28 15:14:38,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:14:38,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:14:38,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:38,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:38,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:38,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:39,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:39,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:39,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:39,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:39,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:39,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:39,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:40,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:40,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:41,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:43,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:14:43,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 232 [2020-10-28 15:14:43,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 15:14:43,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 15:14:43,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:14:43,256 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:14:43,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-28 15:14:43,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-28 15:14:43,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-28 15:14:43,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:14:44,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:14:44,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:14:44,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:44,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:14:44,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:14:44,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:14:44,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:14:44,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:14:44,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:14:44,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:14:44,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:14:44,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:14:44,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:14:44,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6163 backedges. 3088 proven. 1711 refuted. 0 times theorem prover too weak. 1364 trivial. 0 not checked. [2020-10-28 15:14:44,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1950362285] [2020-10-28 15:14:44,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:14:44,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-28 15:14:44,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344119818] [2020-10-28 15:14:44,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-28 15:14:44,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:14:44,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-28 15:14:44,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 15:14:44,057 INFO L87 Difference]: Start difference. First operand 223 states and 262 transitions. Second operand 33 states. [2020-10-28 15:14:46,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:14:46,420 INFO L93 Difference]: Finished difference Result 370 states and 450 transitions. [2020-10-28 15:14:46,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 15:14:46,421 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 222 [2020-10-28 15:14:46,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:14:46,423 INFO L225 Difference]: With dead ends: 370 [2020-10-28 15:14:46,423 INFO L226 Difference]: Without dead ends: 227 [2020-10-28 15:14:46,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2020-10-28 15:14:46,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-28 15:14:46,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2020-10-28 15:14:46,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-28 15:14:46,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 267 transitions. [2020-10-28 15:14:46,436 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 267 transitions. Word has length 222 [2020-10-28 15:14:46,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:14:46,436 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 267 transitions. [2020-10-28 15:14:46,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-28 15:14:46,437 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 267 transitions. [2020-10-28 15:14:46,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-10-28 15:14:46,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:14:46,438 INFO L422 BasicCegarLoop]: trace histogram [72, 37, 35, 35, 30, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:14:46,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-28 15:14:46,438 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:14:46,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:14:46,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1005303945, now seen corresponding path program 41 times [2020-10-28 15:14:46,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:14:46,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1419352901] [2020-10-28 15:14:46,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:14:46,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:14:46,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:46,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:47,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:47,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:47,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:47,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:47,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:48,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:48,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:48,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:48,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:48,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:49,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:50,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:51,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:14:51,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 236 [2020-10-28 15:14:51,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 15:14:51,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 15:14:51,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:14:51,477 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:14:51,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-28 15:14:51,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:14:51,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-28 15:14:51,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0