/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label31.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 13:37:35,313 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 13:37:35,318 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 13:37:35,381 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 13:37:35,382 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 13:37:35,389 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 13:37:35,393 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 13:37:35,399 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 13:37:35,403 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 13:37:35,411 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 13:37:35,412 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 13:37:35,414 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 13:37:35,415 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 13:37:35,419 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 13:37:35,423 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 13:37:35,426 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 13:37:35,428 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 13:37:35,432 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 13:37:35,440 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 13:37:35,458 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 13:37:35,460 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 13:37:35,462 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 13:37:35,464 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 13:37:35,467 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 13:37:35,478 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 13:37:35,478 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 13:37:35,479 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 13:37:35,482 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 13:37:35,482 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 13:37:35,484 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 13:37:35,484 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 13:37:35,485 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 13:37:35,488 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 13:37:35,489 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 13:37:35,491 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 13:37:35,491 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 13:37:35,492 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 13:37:35,492 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 13:37:35,492 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 13:37:35,494 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 13:37:35,494 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 13:37:35,503 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 13:37:35,559 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 13:37:35,559 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 13:37:35,564 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 13:37:35,564 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 13:37:35,564 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 13:37:35,565 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 13:37:35,565 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 13:37:35,565 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 13:37:35,565 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 13:37:35,566 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 13:37:35,567 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 13:37:35,567 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 13:37:35,568 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 13:37:35,568 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 13:37:35,568 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 13:37:35,568 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 13:37:35,569 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 13:37:35,569 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 13:37:35,569 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 13:37:35,569 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 13:37:35,570 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 13:37:35,570 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 13:37:35,570 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 13:37:35,571 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 13:37:35,571 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 13:37:35,571 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 13:37:35,571 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 13:37:35,572 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 13:37:35,572 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 13:37:35,572 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 13:37:36,039 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 13:37:36,076 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 13:37:36,079 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 13:37:36,081 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 13:37:36,082 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 13:37:36,083 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label31.c [2020-10-28 13:37:36,194 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/76cd80fb3/d569b7991d68436691f9344946a53ae4/FLAG243c6f3c3 [2020-10-28 13:37:37,269 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 13:37:37,272 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label31.c [2020-10-28 13:37:37,306 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/76cd80fb3/d569b7991d68436691f9344946a53ae4/FLAG243c6f3c3 [2020-10-28 13:37:37,796 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/76cd80fb3/d569b7991d68436691f9344946a53ae4 [2020-10-28 13:37:37,799 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 13:37:37,806 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 13:37:37,808 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 13:37:37,809 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 13:37:37,814 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 13:37:37,816 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 01:37:37" (1/1) ... [2020-10-28 13:37:37,820 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@700b6c71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:37:37, skipping insertion in model container [2020-10-28 13:37:37,821 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 01:37:37" (1/1) ... [2020-10-28 13:37:37,830 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 13:37:37,942 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 13:37:39,066 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 13:37:39,081 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 13:37:39,577 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 13:37:39,607 INFO L208 MainTranslator]: Completed translation [2020-10-28 13:37:39,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:37:39 WrapperNode [2020-10-28 13:37:39,609 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 13:37:39,610 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 13:37:39,610 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 13:37:39,611 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 13:37:39,628 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:37:39" (1/1) ... [2020-10-28 13:37:39,630 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:37:39" (1/1) ... [2020-10-28 13:37:39,708 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:37:39" (1/1) ... [2020-10-28 13:37:39,708 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:37:39" (1/1) ... [2020-10-28 13:37:39,807 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:37:39" (1/1) ... [2020-10-28 13:37:39,827 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:37:39" (1/1) ... [2020-10-28 13:37:39,866 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:37:39" (1/1) ... [2020-10-28 13:37:39,905 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 13:37:39,907 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 13:37:39,907 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 13:37:39,908 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 13:37:39,909 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:37:39" (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 13:37:40,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 13:37:40,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 13:37:40,001 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 13:37:40,001 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 13:37:40,002 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 13:37:40,002 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 13:37:40,002 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 13:37:40,002 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 13:37:40,002 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 13:37:40,002 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 13:37:40,003 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 13:37:40,003 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 13:37:40,003 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 13:37:40,003 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 13:37:40,003 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 13:37:40,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 13:37:40,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 13:37:40,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 13:37:40,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 13:37:40,004 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 13:37:40,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 13:37:51,417 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 13:37:51,418 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 13:37:51,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 01:37:51 BoogieIcfgContainer [2020-10-28 13:37:51,421 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 13:37:51,423 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 13:37:51,424 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 13:37:51,427 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 13:37:51,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 01:37:37" (1/3) ... [2020-10-28 13:37:51,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2072979c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 01:37:51, skipping insertion in model container [2020-10-28 13:37:51,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:37:39" (2/3) ... [2020-10-28 13:37:51,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2072979c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 01:37:51, skipping insertion in model container [2020-10-28 13:37:51,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 01:37:51" (3/3) ... [2020-10-28 13:37:51,432 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label31.c [2020-10-28 13:37:51,446 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 13:37:51,452 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 13:37:51,467 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 13:37:51,503 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 13:37:51,503 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 13:37:51,503 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 13:37:51,503 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 13:37:51,504 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 13:37:51,504 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 13:37:51,504 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 13:37:51,504 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 13:37:51,538 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states. [2020-10-28 13:37:51,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-28 13:37:51,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:37:51,546 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:37:51,546 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:37:51,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:37:51,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1281093483, now seen corresponding path program 1 times [2020-10-28 13:37:51,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:37:51,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1916114242] [2020-10-28 13:37:51,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:37:51,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:37:51,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:37:52,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:37:52,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 13:37:52,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:37:52,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 460 [2020-10-28 13:37:52,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:37:52,232 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:37:52,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:37:52,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 13:37:52,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 13:37:52,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 13:37:52,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:37:52,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:37:52,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:37:52,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:37:52,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:37:52,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:37:52,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-28 13:37:52,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:37:52,497 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:37:52,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:37:52,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:37:52,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 13:37:52,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:37:52,521 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 13:37:52,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1916114242] [2020-10-28 13:37:52,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 13:37:52,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 13:37:52,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914793832] [2020-10-28 13:37:52,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 13:37:52,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:37:52,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 13:37:52,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 13:37:52,558 INFO L87 Difference]: Start difference. First operand 607 states. Second operand 4 states. [2020-10-28 13:38:05,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:38:05,241 INFO L93 Difference]: Finished difference Result 1697 states and 3097 transitions. [2020-10-28 13:38:05,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 13:38:05,244 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-28 13:38:05,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:38:05,275 INFO L225 Difference]: With dead ends: 1697 [2020-10-28 13:38:05,276 INFO L226 Difference]: Without dead ends: 1013 [2020-10-28 13:38:05,286 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 13:38:05,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2020-10-28 13:38:05,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 1003. [2020-10-28 13:38:05,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1003 states. [2020-10-28 13:38:05,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1543 transitions. [2020-10-28 13:38:05,429 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1543 transitions. Word has length 15 [2020-10-28 13:38:05,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:38:05,430 INFO L481 AbstractCegarLoop]: Abstraction has 1003 states and 1543 transitions. [2020-10-28 13:38:05,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 13:38:05,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1543 transitions. [2020-10-28 13:38:05,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-28 13:38:05,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:38:05,436 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:38:05,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 13:38:05,436 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:38:05,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:38:05,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1501562538, now seen corresponding path program 1 times [2020-10-28 13:38:05,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:38:05,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375398083] [2020-10-28 13:38:05,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:38:05,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:38:05,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:38:06,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:38:06,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:38:07,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:38:07,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-28 13:38:07,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 13:38:07,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1673 [2020-10-28 13:38:07,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:38:07,170 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:38:07,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:38:07,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 13:38:07,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-28 13:38:07,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 13:38:07,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:38:07,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:38:07,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:38:07,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:38:07,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:38:07,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:38:07,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 13:38:07,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:38:07,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:38:07,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:38:07,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:38:07,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 13:38:07,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:38:07,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:38:07,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:38:07,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:38:07,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:38:07,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 13:38:07,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:38:07,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 159 [2020-10-28 13:38:07,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:38:07,525 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:38:07,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:38:07,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:38:07,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-28 13:38:07,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:38:07,636 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 13:38:07,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375398083] [2020-10-28 13:38:07,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 13:38:07,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 13:38:07,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11667224] [2020-10-28 13:38:07,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:38:07,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:38:07,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:38:07,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:38:07,641 INFO L87 Difference]: Start difference. First operand 1003 states and 1543 transitions. Second operand 7 states. [2020-10-28 13:38:21,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:38:21,743 INFO L93 Difference]: Finished difference Result 2930 states and 4534 transitions. [2020-10-28 13:38:21,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 13:38:21,744 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 86 [2020-10-28 13:38:21,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:38:21,759 INFO L225 Difference]: With dead ends: 2930 [2020-10-28 13:38:21,759 INFO L226 Difference]: Without dead ends: 1933 [2020-10-28 13:38:21,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-28 13:38:21,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1933 states. [2020-10-28 13:38:21,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1933 to 1902. [2020-10-28 13:38:21,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1902 states. [2020-10-28 13:38:21,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1902 states to 1902 states and 2466 transitions. [2020-10-28 13:38:21,875 INFO L78 Accepts]: Start accepts. Automaton has 1902 states and 2466 transitions. Word has length 86 [2020-10-28 13:38:21,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:38:21,876 INFO L481 AbstractCegarLoop]: Abstraction has 1902 states and 2466 transitions. [2020-10-28 13:38:21,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:38:21,877 INFO L276 IsEmpty]: Start isEmpty. Operand 1902 states and 2466 transitions. [2020-10-28 13:38:21,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-28 13:38:21,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:38:21,882 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:38:21,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 13:38:21,883 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:38:21,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:38:21,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1113474207, now seen corresponding path program 1 times [2020-10-28 13:38:21,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:38:21,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026783260] [2020-10-28 13:38:21,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:38:22,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:38:22,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:38:22,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:38:22,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-28 13:38:22,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:38:22,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 575 [2020-10-28 13:38:22,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:38:22,596 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:38:22,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 13:38:22,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 13:38:22,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-28 13:38:22,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 13:38:22,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:38:22,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:38:22,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:38:22,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:38:22,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:38:22,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:38:22,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 13:38:22,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:38:22,781 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:38:22,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:38:22,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:38:22,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 13:38:22,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:38:22,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:38:22,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:38:22,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:38:23,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:38:23,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 13:38:23,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:38:23,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 306 [2020-10-28 13:38:23,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:38:23,144 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:38:23,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 13:38:23,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:38:23,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-28 13:38:23,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:38:23,275 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 13:38:23,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2026783260] [2020-10-28 13:38:23,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:38:23,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:38:23,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895837458] [2020-10-28 13:38:23,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 13:38:23,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:38:23,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 13:38:23,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-28 13:38:23,282 INFO L87 Difference]: Start difference. First operand 1902 states and 2466 transitions. Second operand 8 states. [2020-10-28 13:38:48,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:38:48,741 INFO L93 Difference]: Finished difference Result 7444 states and 9757 transitions. [2020-10-28 13:38:48,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 13:38:48,743 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 89 [2020-10-28 13:38:48,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:38:48,776 INFO L225 Difference]: With dead ends: 7444 [2020-10-28 13:38:48,777 INFO L226 Difference]: Without dead ends: 4660 [2020-10-28 13:38:48,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-10-28 13:38:48,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4660 states. [2020-10-28 13:38:48,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4660 to 4634. [2020-10-28 13:38:48,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4634 states. [2020-10-28 13:38:48,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4634 states to 4634 states and 5842 transitions. [2020-10-28 13:38:48,996 INFO L78 Accepts]: Start accepts. Automaton has 4634 states and 5842 transitions. Word has length 89 [2020-10-28 13:38:48,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:38:48,999 INFO L481 AbstractCegarLoop]: Abstraction has 4634 states and 5842 transitions. [2020-10-28 13:38:48,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 13:38:48,999 INFO L276 IsEmpty]: Start isEmpty. Operand 4634 states and 5842 transitions. [2020-10-28 13:38:49,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-28 13:38:49,014 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:38:49,014 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:38:49,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 13:38:49,015 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:38:49,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:38:49,016 INFO L82 PathProgramCache]: Analyzing trace with hash -39779833, now seen corresponding path program 1 times [2020-10-28 13:38:49,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:38:49,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [794034645] [2020-10-28 13:38:49,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:38:49,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:38:49,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:38:49,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:38:50,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:38:50,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 185 [2020-10-28 13:38:50,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:38:50,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1565 [2020-10-28 13:38:50,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:38:50,657 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:38:50,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:38:50,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-28 13:38:50,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-28 13:38:50,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:38:50,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:38:50,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:38:50,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:38:50,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:38:50,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:38:50,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:38:50,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 13:38:50,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:38:50,815 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:38:50,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:38:50,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:38:50,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:38:50,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:38:50,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:38:50,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:38:50,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:38:50,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:38:50,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 13:38:50,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:38:50,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-10-28 13:38:50,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:38:50,978 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:38:50,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:38:50,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:38:50,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-28 13:38:50,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:38:51,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-28 13:38:51,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:38:51,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:38:51,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:38:51,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 13:38:51,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:38:51,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 215 [2020-10-28 13:38:51,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:38:51,256 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:38:51,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:38:51,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:38:51,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 13:38:51,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:38:51,358 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 80 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 13:38:51,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [794034645] [2020-10-28 13:38:51,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:38:51,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:38:51,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966622259] [2020-10-28 13:38:51,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:38:51,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:38:51,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:38:51,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:38:51,361 INFO L87 Difference]: Start difference. First operand 4634 states and 5842 transitions. Second operand 7 states. [2020-10-28 13:39:08,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:39:08,579 INFO L93 Difference]: Finished difference Result 11579 states and 15228 transitions. [2020-10-28 13:39:08,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 13:39:08,586 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 171 [2020-10-28 13:39:08,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:39:08,637 INFO L225 Difference]: With dead ends: 11579 [2020-10-28 13:39:08,637 INFO L226 Difference]: Without dead ends: 6951 [2020-10-28 13:39:08,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 13:39:08,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6951 states. [2020-10-28 13:39:08,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6951 to 6917. [2020-10-28 13:39:08,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6917 states. [2020-10-28 13:39:08,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6917 states to 6917 states and 8688 transitions. [2020-10-28 13:39:08,925 INFO L78 Accepts]: Start accepts. Automaton has 6917 states and 8688 transitions. Word has length 171 [2020-10-28 13:39:08,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:39:08,927 INFO L481 AbstractCegarLoop]: Abstraction has 6917 states and 8688 transitions. [2020-10-28 13:39:08,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:39:08,928 INFO L276 IsEmpty]: Start isEmpty. Operand 6917 states and 8688 transitions. [2020-10-28 13:39:08,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-10-28 13:39:08,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:39:08,940 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:39:08,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 13:39:08,940 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:39:08,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:39:08,941 INFO L82 PathProgramCache]: Analyzing trace with hash 2143178877, now seen corresponding path program 1 times [2020-10-28 13:39:08,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:39:08,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [472310051] [2020-10-28 13:39:08,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:39:09,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:39:09,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:39:09,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:39:13,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:39:14,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:39:14,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 202 [2020-10-28 13:39:14,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 13:39:14,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-28 13:39:14,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:39:14,076 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:39:14,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:39:14,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-28 13:39:14,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-28 13:39:14,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:39:14,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:39:14,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:39:14,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:39:14,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:39:14,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:39:14,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:39:14,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 13:39:14,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:39:14,291 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:39:14,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:39:14,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:39:14,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:39:14,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:39:14,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:39:14,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:39:14,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:39:14,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:39:14,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 13:39:14,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:39:14,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-10-28 13:39:14,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:39:14,468 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:39:14,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:39:14,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:39:14,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-28 13:39:14,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:39:14,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-28 13:39:14,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:39:14,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:39:14,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:39:14,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:39:14,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 13:39:14,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:39:14,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 327 [2020-10-28 13:39:14,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:39:14,871 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:39:14,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:39:14,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:39:14,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-28 13:39:14,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:39:14,995 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-10-28 13:39:14,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [472310051] [2020-10-28 13:39:14,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:39:14,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 13:39:14,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91657795] [2020-10-28 13:39:14,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 13:39:14,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:39:14,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 13:39:14,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 13:39:14,998 INFO L87 Difference]: Start difference. First operand 6917 states and 8688 transitions. Second operand 6 states. [2020-10-28 13:39:15,744 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-28 13:39:31,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:39:31,413 INFO L93 Difference]: Finished difference Result 13848 states and 17400 transitions. [2020-10-28 13:39:31,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 13:39:31,415 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 188 [2020-10-28 13:39:31,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:39:31,458 INFO L225 Difference]: With dead ends: 13848 [2020-10-28 13:39:31,458 INFO L226 Difference]: Without dead ends: 6937 [2020-10-28 13:39:31,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:39:31,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6937 states. [2020-10-28 13:39:31,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6937 to 6917. [2020-10-28 13:39:31,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6917 states. [2020-10-28 13:39:31,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6917 states to 6917 states and 8658 transitions. [2020-10-28 13:39:31,692 INFO L78 Accepts]: Start accepts. Automaton has 6917 states and 8658 transitions. Word has length 188 [2020-10-28 13:39:31,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:39:31,693 INFO L481 AbstractCegarLoop]: Abstraction has 6917 states and 8658 transitions. [2020-10-28 13:39:31,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 13:39:31,693 INFO L276 IsEmpty]: Start isEmpty. Operand 6917 states and 8658 transitions. [2020-10-28 13:39:31,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2020-10-28 13:39:31,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:39:31,699 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:39:31,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 13:39:31,700 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:39:31,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:39:31,701 INFO L82 PathProgramCache]: Analyzing trace with hash 2074557784, now seen corresponding path program 1 times [2020-10-28 13:39:31,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:39:31,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1565816959] [2020-10-28 13:39:31,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:39:31,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:39:31,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:39:32,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:39:33,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:39:34,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:39:36,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:39:36,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-28 13:39:36,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 13:39:36,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4546 [2020-10-28 13:39:36,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:39:36,352 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:39:36,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:39:36,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 185 [2020-10-28 13:39:36,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-28 13:39:36,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:39:36,586 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 13:39:36,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:39:36,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:39:36,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:39:36,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:39:36,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:39:36,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:39:36,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 13:39:36,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:39:36,601 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:39:36,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:39:36,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:39:36,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:39:36,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:39:36,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:39:36,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:39:36,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:39:36,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:39:36,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 13:39:36,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:39:36,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-28 13:39:36,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:39:36,701 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:39:36,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:39:36,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:39:36,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:39:36,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:39:36,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-28 13:39:36,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:39:36,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:39:36,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:39:36,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 13:39:36,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:39:36,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-10-28 13:39:36,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:39:36,889 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:39:36,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:39:36,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:39:36,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-28 13:39:36,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:39:36,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-10-28 13:39:36,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:39:36,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:39:37,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:39:37,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:39:37,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 13:39:37,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:39:37,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 173 [2020-10-28 13:39:37,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:39:37,124 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:39:37,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:39:37,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:39:37,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-28 13:39:37,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 13:39:37,268 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 27 proven. 3 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2020-10-28 13:39:37,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1565816959] [2020-10-28 13:39:37,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:39:37,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 13:39:37,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112317362] [2020-10-28 13:39:37,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 13:39:37,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:39:37,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 13:39:37,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 13:39:37,279 INFO L87 Difference]: Start difference. First operand 6917 states and 8658 transitions. Second operand 5 states. [2020-10-28 13:39:53,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:39:53,985 INFO L93 Difference]: Finished difference Result 17786 states and 22717 transitions. [2020-10-28 13:39:53,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 13:39:53,991 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 259 [2020-10-28 13:39:53,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:39:54,036 INFO L225 Difference]: With dead ends: 17786 [2020-10-28 13:39:54,036 INFO L226 Difference]: Without dead ends: 9979 [2020-10-28 13:39:54,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 13:39:54,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9979 states. [2020-10-28 13:39:54,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9979 to 8228. [2020-10-28 13:39:54,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8228 states. [2020-10-28 13:39:54,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8228 states to 8228 states and 9806 transitions. [2020-10-28 13:39:54,263 INFO L78 Accepts]: Start accepts. Automaton has 8228 states and 9806 transitions. Word has length 259 [2020-10-28 13:39:54,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:39:54,263 INFO L481 AbstractCegarLoop]: Abstraction has 8228 states and 9806 transitions. [2020-10-28 13:39:54,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 13:39:54,264 INFO L276 IsEmpty]: Start isEmpty. Operand 8228 states and 9806 transitions. [2020-10-28 13:39:54,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-10-28 13:39:54,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:39:54,269 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:39:54,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 13:39:54,269 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:39:54,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:39:54,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1986003132, now seen corresponding path program 1 times [2020-10-28 13:39:54,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:39:54,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1840294200] [2020-10-28 13:39:54,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:39:54,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:39:54,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:39:54,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:39:55,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:39:57,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:39:58,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:39:58,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 281 [2020-10-28 13:39:58,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 13:39:58,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3813 [2020-10-28 13:39:58,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:39:58,156 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:39:58,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:39:58,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-28 13:39:58,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 168 [2020-10-28 13:39:58,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:39:58,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:39:58,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:39:58,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:39:58,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:39:58,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:39:58,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:39:58,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 13:39:58,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:39:58,343 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:39:58,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:39:58,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:39:58,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:39:58,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:39:58,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:39:58,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:39:58,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:39:58,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:39:58,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 13:39:58,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:39:58,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-10-28 13:39:58,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:39:58,498 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:39:58,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:39:58,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:39:58,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-28 13:39:58,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:39:58,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-28 13:39:58,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:39:58,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:39:58,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:39:58,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:39:58,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 13:39:58,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:39:58,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 235 [2020-10-28 13:39:58,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:39:58,807 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:39:58,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:39:58,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:39:58,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-28 13:39:58,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:39:58,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-10-28 13:39:58,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:39:58,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:39:58,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:39:58,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 13:39:58,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:39:58,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 127 [2020-10-28 13:39:58,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:39:58,987 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:39:58,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:39:58,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:39:58,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-28 13:39:58,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:39:59,275 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 169 proven. 4 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2020-10-28 13:39:59,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1840294200] [2020-10-28 13:39:59,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:39:59,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 13:39:59,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505170580] [2020-10-28 13:39:59,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 13:39:59,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:39:59,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 13:39:59,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 13:39:59,281 INFO L87 Difference]: Start difference. First operand 8228 states and 9806 transitions. Second operand 8 states. [2020-10-28 13:39:59,447 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-28 13:40:06,638 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-28 13:40:13,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:40:13,971 INFO L93 Difference]: Finished difference Result 16912 states and 20176 transitions. [2020-10-28 13:40:13,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 13:40:13,974 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 265 [2020-10-28 13:40:13,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:40:14,001 INFO L225 Difference]: With dead ends: 16912 [2020-10-28 13:40:14,001 INFO L226 Difference]: Without dead ends: 8690 [2020-10-28 13:40:14,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-28 13:40:14,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8690 states. [2020-10-28 13:40:14,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8690 to 8675. [2020-10-28 13:40:14,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8675 states. [2020-10-28 13:40:14,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8675 states to 8675 states and 10302 transitions. [2020-10-28 13:40:14,196 INFO L78 Accepts]: Start accepts. Automaton has 8675 states and 10302 transitions. Word has length 265 [2020-10-28 13:40:14,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:40:14,197 INFO L481 AbstractCegarLoop]: Abstraction has 8675 states and 10302 transitions. [2020-10-28 13:40:14,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 13:40:14,197 INFO L276 IsEmpty]: Start isEmpty. Operand 8675 states and 10302 transitions. [2020-10-28 13:40:14,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2020-10-28 13:40:14,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:40:14,202 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:40:14,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 13:40:14,203 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:40:14,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:40:14,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1159203239, now seen corresponding path program 1 times [2020-10-28 13:40:14,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:40:14,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1124568813] [2020-10-28 13:40:14,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:40:14,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:40:14,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:40:14,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:40:14,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:40:15,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:40:19,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:40:19,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 295 [2020-10-28 13:40:19,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 13:40:19,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-28 13:40:19,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:40:19,361 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:40:19,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:40:19,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-28 13:40:19,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-10-28 13:40:19,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:40:19,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:40:19,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:40:19,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:40:19,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:40:19,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:40:19,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:40:19,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 13:40:19,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:40:19,525 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:40:19,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:40:19,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:40:19,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:40:19,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:40:19,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:40:19,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:40:19,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:40:19,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:40:19,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 13:40:19,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:40:19,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-10-28 13:40:19,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:40:19,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:40:19,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:40:19,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:40:19,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-28 13:40:19,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:40:19,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-28 13:40:19,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:40:19,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:40:19,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:40:19,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-28 13:40:19,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:40:19,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 230 [2020-10-28 13:40:19,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:40:19,961 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:40:19,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:40:19,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:40:19,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-28 13:40:19,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:40:20,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2020-10-28 13:40:20,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:40:20,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:40:20,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:40:20,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 13:40:20,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:40:20,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-28 13:40:20,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:40:20,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:40:20,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:40:20,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-28 13:40:20,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:40:20,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:40:20,366 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 109 proven. 74 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-28 13:40:20,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1124568813] [2020-10-28 13:40:20,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:40:20,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:40:20,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510754191] [2020-10-28 13:40:20,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:40:20,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:40:20,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:40:20,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:40:20,370 INFO L87 Difference]: Start difference. First operand 8675 states and 10302 transitions. Second operand 7 states. [2020-10-28 13:40:42,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:40:42,230 INFO L93 Difference]: Finished difference Result 22105 states and 27281 transitions. [2020-10-28 13:40:42,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 13:40:42,236 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 279 [2020-10-28 13:40:42,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:40:42,287 INFO L225 Difference]: With dead ends: 22105 [2020-10-28 13:40:42,287 INFO L226 Difference]: Without dead ends: 13436 [2020-10-28 13:40:42,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 13:40:42,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13436 states. [2020-10-28 13:40:42,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13436 to 12925. [2020-10-28 13:40:42,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12925 states. [2020-10-28 13:40:42,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12925 states to 12925 states and 15457 transitions. [2020-10-28 13:40:42,714 INFO L78 Accepts]: Start accepts. Automaton has 12925 states and 15457 transitions. Word has length 279 [2020-10-28 13:40:42,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:40:42,715 INFO L481 AbstractCegarLoop]: Abstraction has 12925 states and 15457 transitions. [2020-10-28 13:40:42,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:40:42,715 INFO L276 IsEmpty]: Start isEmpty. Operand 12925 states and 15457 transitions. [2020-10-28 13:40:42,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-10-28 13:40:42,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:40:42,721 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:40:42,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 13:40:42,721 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:40:42,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:40:42,722 INFO L82 PathProgramCache]: Analyzing trace with hash -2084962465, now seen corresponding path program 1 times [2020-10-28 13:40:42,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:40:42,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117349311] [2020-10-28 13:40:42,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:40:42,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:40:42,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:40:42,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:40:43,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:40:47,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:40:47,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 302 [2020-10-28 13:40:47,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 13:40:47,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-28 13:40:47,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:40:47,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:40:47,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:40:47,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-28 13:40:47,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-28 13:40:47,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:40:48,020 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 13:40:48,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:40:48,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:40:48,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:40:48,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:40:48,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:40:48,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:40:48,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 13:40:48,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:40:48,034 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:40:48,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:40:48,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:40:48,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:40:48,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:40:48,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:40:48,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:40:48,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:40:48,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:40:48,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 13:40:48,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:40:48,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-28 13:40:48,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:40:48,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:40:48,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:40:48,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:40:48,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-28 13:40:48,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:40:48,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-28 13:40:48,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:40:48,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:40:48,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:40:48,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-28 13:40:48,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:40:48,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 250 [2020-10-28 13:40:48,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:40:48,516 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:40:48,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:40:48,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:40:48,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-28 13:40:48,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:40:48,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2020-10-28 13:40:48,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:40:48,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:40:48,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:40:48,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 13:40:48,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:40:48,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-28 13:40:48,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:40:48,824 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:40:48,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:40:48,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-28 13:40:48,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:40:48,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:40:49,006 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 109 proven. 74 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-28 13:40:49,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [117349311] [2020-10-28 13:40:49,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:40:49,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:40:49,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375304845] [2020-10-28 13:40:49,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:40:49,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:40:49,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:40:49,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:40:49,010 INFO L87 Difference]: Start difference. First operand 12925 states and 15457 transitions. Second operand 7 states. [2020-10-28 13:40:49,893 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-28 13:41:08,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:41:08,443 INFO L93 Difference]: Finished difference Result 28161 states and 33554 transitions. [2020-10-28 13:41:08,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 13:41:08,446 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 286 [2020-10-28 13:41:08,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:41:08,511 INFO L225 Difference]: With dead ends: 28161 [2020-10-28 13:41:08,511 INFO L226 Difference]: Without dead ends: 15242 [2020-10-28 13:41:08,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-28 13:41:08,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15242 states. [2020-10-28 13:41:08,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15242 to 14730. [2020-10-28 13:41:08,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14730 states. [2020-10-28 13:41:09,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14730 states to 14730 states and 17500 transitions. [2020-10-28 13:41:09,023 INFO L78 Accepts]: Start accepts. Automaton has 14730 states and 17500 transitions. Word has length 286 [2020-10-28 13:41:09,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:41:09,024 INFO L481 AbstractCegarLoop]: Abstraction has 14730 states and 17500 transitions. [2020-10-28 13:41:09,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:41:09,024 INFO L276 IsEmpty]: Start isEmpty. Operand 14730 states and 17500 transitions. [2020-10-28 13:41:09,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2020-10-28 13:41:09,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:41:09,030 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:41:09,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 13:41:09,031 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:41:09,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:41:09,032 INFO L82 PathProgramCache]: Analyzing trace with hash 403197431, now seen corresponding path program 1 times [2020-10-28 13:41:09,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:41:09,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [281372806] [2020-10-28 13:41:09,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:41:09,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:41:09,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:41:09,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:41:09,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:41:11,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:41:14,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:41:14,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 322 [2020-10-28 13:41:14,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 13:41:14,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-28 13:41:14,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:41:14,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:41:14,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:41:14,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 228 [2020-10-28 13:41:14,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-28 13:41:14,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:41:14,358 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 13:41:14,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:41:14,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:41:14,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:41:14,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:41:14,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:41:14,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:41:14,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 13:41:14,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:41:14,368 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:41:14,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:41:14,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:41:14,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:41:14,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:41:14,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:41:14,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:41:14,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:41:14,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:41:14,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 13:41:14,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:41:14,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 13:41:14,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:41:14,435 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:41:14,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:41:14,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:41:14,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:41:14,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:41:14,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-28 13:41:14,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:41:14,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:41:14,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:41:14,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-28 13:41:14,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:41:14,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-28 13:41:14,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:41:14,611 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:41:14,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:41:14,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:41:14,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-28 13:41:14,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:41:14,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2020-10-28 13:41:14,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:41:14,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:41:14,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:41:14,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:41:14,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 13:41:14,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:41:14,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 159 [2020-10-28 13:41:14,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:41:14,820 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:41:14,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:41:14,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:41:14,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-28 13:41:14,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:41:15,018 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 160 proven. 8 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-10-28 13:41:15,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [281372806] [2020-10-28 13:41:15,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:41:15,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 13:41:15,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75022692] [2020-10-28 13:41:15,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 13:41:15,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:41:15,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 13:41:15,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 13:41:15,021 INFO L87 Difference]: Start difference. First operand 14730 states and 17500 transitions. Second operand 6 states. [2020-10-28 13:41:16,472 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 66