/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/array-crafted/zero_sum_const_m5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 08:47:15,648 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 08:47:15,654 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 08:47:15,733 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 08:47:15,733 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 08:47:15,743 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 08:47:15,746 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 08:47:15,752 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 08:47:15,757 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 08:47:15,766 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 08:47:15,768 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 08:47:15,771 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 08:47:15,771 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 08:47:15,776 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 08:47:15,781 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 08:47:15,784 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 08:47:15,786 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 08:47:15,791 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 08:47:15,800 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 08:47:15,803 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 08:47:15,806 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 08:47:15,808 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 08:47:15,809 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 08:47:15,811 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 08:47:15,814 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 08:47:15,815 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 08:47:15,815 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 08:47:15,817 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 08:47:15,817 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 08:47:15,819 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 08:47:15,819 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 08:47:15,821 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 08:47:15,822 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 08:47:15,823 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 08:47:15,825 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 08:47:15,835 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 08:47:15,837 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 08:47:15,837 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 08:47:15,837 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 08:47:15,839 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 08:47:15,840 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 08:47:15,841 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 08:47:15,871 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 08:47:15,872 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 08:47:15,874 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 08:47:15,875 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 08:47:15,875 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 08:47:15,875 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 08:47:15,876 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 08:47:15,876 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 08:47:15,876 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 08:47:15,876 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 08:47:15,876 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 08:47:15,877 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 08:47:15,877 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 08:47:15,877 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 08:47:15,877 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 08:47:15,878 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 08:47:15,878 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 08:47:15,878 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 08:47:15,878 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 08:47:15,879 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 08:47:15,879 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 08:47:15,879 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 08:47:15,879 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 08:47:15,880 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 08:47:15,880 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 08:47:15,880 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 08:47:15,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 08:47:15,880 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 08:47:15,881 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 08:47:15,881 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 08:47:16,313 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 08:47:16,366 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 08:47:16,371 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 08:47:16,373 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 08:47:16,374 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 08:47:16,377 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const_m5.c [2020-10-28 08:47:16,504 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/74ca4ea7a/4153bc9ef7334f88b119647202ac8647/FLAG046f75644 [2020-10-28 08:47:17,404 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 08:47:17,409 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/zero_sum_const_m5.c [2020-10-28 08:47:17,424 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/74ca4ea7a/4153bc9ef7334f88b119647202ac8647/FLAG046f75644 [2020-10-28 08:47:17,701 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/74ca4ea7a/4153bc9ef7334f88b119647202ac8647 [2020-10-28 08:47:17,705 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 08:47:17,713 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 08:47:17,716 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 08:47:17,718 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 08:47:17,727 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 08:47:17,728 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:47:17" (1/1) ... [2020-10-28 08:47:17,733 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a1a6db8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:17, skipping insertion in model container [2020-10-28 08:47:17,733 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:47:17" (1/1) ... [2020-10-28 08:47:17,747 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 08:47:17,785 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 08:47:18,032 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:47:18,054 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 08:47:18,124 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:47:18,150 INFO L208 MainTranslator]: Completed translation [2020-10-28 08:47:18,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:18 WrapperNode [2020-10-28 08:47:18,151 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 08:47:18,153 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 08:47:18,154 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 08:47:18,154 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 08:47:18,175 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:18" (1/1) ... [2020-10-28 08:47:18,176 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:18" (1/1) ... [2020-10-28 08:47:18,189 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:18" (1/1) ... [2020-10-28 08:47:18,190 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:18" (1/1) ... [2020-10-28 08:47:18,208 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:18" (1/1) ... [2020-10-28 08:47:18,224 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:18" (1/1) ... [2020-10-28 08:47:18,229 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:18" (1/1) ... [2020-10-28 08:47:18,233 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 08:47:18,235 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 08:47:18,235 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 08:47:18,235 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 08:47:18,237 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:18" (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 08:47:18,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 08:47:18,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 08:47:18,357 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 08:47:18,357 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 08:47:18,357 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 08:47:18,357 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 08:47:18,358 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 08:47:18,358 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 08:47:18,359 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 08:47:18,359 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 08:47:18,359 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 08:47:18,359 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 08:47:18,359 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-10-28 08:47:18,360 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-28 08:47:18,360 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 08:47:18,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-28 08:47:18,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 08:47:18,361 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 08:47:18,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 08:47:18,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 08:47:18,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 08:47:18,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 08:47:19,243 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 08:47:19,244 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-10-28 08:47:19,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:47:19 BoogieIcfgContainer [2020-10-28 08:47:19,247 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 08:47:19,254 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 08:47:19,254 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 08:47:19,259 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 08:47:19,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:47:17" (1/3) ... [2020-10-28 08:47:19,262 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c6fbc36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:47:19, skipping insertion in model container [2020-10-28 08:47:19,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:18" (2/3) ... [2020-10-28 08:47:19,263 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c6fbc36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:47:19, skipping insertion in model container [2020-10-28 08:47:19,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:47:19" (3/3) ... [2020-10-28 08:47:19,267 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_const_m5.c [2020-10-28 08:47:19,285 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 08:47:19,299 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 08:47:19,317 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 08:47:19,369 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 08:47:19,369 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 08:47:19,369 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 08:47:19,370 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 08:47:19,370 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 08:47:19,370 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 08:47:19,371 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 08:47:19,371 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 08:47:19,409 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states. [2020-10-28 08:47:19,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 08:47:19,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:47:19,422 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:47:19,423 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:47:19,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:47:19,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1455593951, now seen corresponding path program 1 times [2020-10-28 08:47:19,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:47:19,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [847892882] [2020-10-28 08:47:19,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:47:19,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:19,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:19,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:19,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:19,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:20,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:20,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:20,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:20,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:20,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:20,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:21,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:22,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:24,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:24,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 08:47:24,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 08:47:24,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 08:47:24,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:24,663 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:24,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:47:24,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 08:47:24,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:47:24,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 08:47:24,828 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-10-28 08:47:24,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:47:24,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:24,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:24,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:24,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:47:24,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:47:24,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 08:47:24,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:24,856 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:24,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:47:24,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:47:24,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:47:24,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:47:24,886 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 08:47:24,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [847892882] [2020-10-28 08:47:24,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:47:24,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 08:47:24,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839409786] [2020-10-28 08:47:24,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 08:47:24,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:47:24,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 08:47:24,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 08:47:24,934 INFO L87 Difference]: Start difference. First operand 55 states. Second operand 3 states. [2020-10-28 08:47:25,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:47:25,178 INFO L93 Difference]: Finished difference Result 98 states and 143 transitions. [2020-10-28 08:47:25,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 08:47:25,181 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2020-10-28 08:47:25,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:47:25,191 INFO L225 Difference]: With dead ends: 98 [2020-10-28 08:47:25,192 INFO L226 Difference]: Without dead ends: 45 [2020-10-28 08:47:25,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 08:47:25,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-28 08:47:25,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-28 08:47:25,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-28 08:47:25,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2020-10-28 08:47:25,252 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 33 [2020-10-28 08:47:25,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:47:25,253 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2020-10-28 08:47:25,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 08:47:25,254 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2020-10-28 08:47:25,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 08:47:25,255 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:47:25,255 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:47:25,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 08:47:25,256 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:47:25,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:47:25,258 INFO L82 PathProgramCache]: Analyzing trace with hash 69276593, now seen corresponding path program 1 times [2020-10-28 08:47:25,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:47:25,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1330522930] [2020-10-28 08:47:25,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:47:25,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:25,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:25,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:25,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:25,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:25,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:25,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:25,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:25,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:25,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:26,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:28,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:30,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:30,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 08:47:30,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 08:47:30,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 08:47:30,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:30,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:30,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 08:47:30,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:47:30,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 08:47:30,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:47:30,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:47:30,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:30,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:30,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:30,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:47:30,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:47:30,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 08:47:30,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:30,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:30,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:47:30,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:47:30,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:47:30,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:47:30,409 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 08:47:30,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1330522930] [2020-10-28 08:47:30,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:47:30,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 08:47:30,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814678074] [2020-10-28 08:47:30,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 08:47:30,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:47:30,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 08:47:30,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:47:30,416 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand 5 states. [2020-10-28 08:47:30,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:47:30,828 INFO L93 Difference]: Finished difference Result 103 states and 133 transitions. [2020-10-28 08:47:30,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 08:47:30,830 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-10-28 08:47:30,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:47:30,832 INFO L225 Difference]: With dead ends: 103 [2020-10-28 08:47:30,832 INFO L226 Difference]: Without dead ends: 67 [2020-10-28 08:47:30,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:47:30,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-28 08:47:30,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-10-28 08:47:30,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-28 08:47:30,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2020-10-28 08:47:30,850 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 33 [2020-10-28 08:47:30,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:47:30,850 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2020-10-28 08:47:30,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 08:47:30,851 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2020-10-28 08:47:30,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 08:47:30,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:47:30,853 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:47:30,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 08:47:30,854 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:47:30,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:47:30,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1858982343, now seen corresponding path program 1 times [2020-10-28 08:47:30,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:47:30,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968127650] [2020-10-28 08:47:30,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:47:30,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:30,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:31,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:31,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:31,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:31,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:31,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:31,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:31,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:35,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:35,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 08:47:35,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 08:47:35,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 08:47:35,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:35,918 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:35,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 08:47:35,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:47:35,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 08:47:35,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:47:36,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:47:36,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:36,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:36,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:36,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:47:36,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:47:36,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 08:47:36,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:36,031 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:36,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:47:36,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:47:36,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:47:36,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:47:36,043 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-28 08:47:36,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968127650] [2020-10-28 08:47:36,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:47:36,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 08:47:36,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650464088] [2020-10-28 08:47:36,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 08:47:36,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:47:36,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 08:47:36,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:47:36,052 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand 6 states. [2020-10-28 08:47:36,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:47:36,446 INFO L93 Difference]: Finished difference Result 124 states and 154 transitions. [2020-10-28 08:47:36,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 08:47:36,447 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-28 08:47:36,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:47:36,448 INFO L225 Difference]: With dead ends: 124 [2020-10-28 08:47:36,449 INFO L226 Difference]: Without dead ends: 78 [2020-10-28 08:47:36,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:47:36,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-28 08:47:36,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-10-28 08:47:36,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-28 08:47:36,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 88 transitions. [2020-10-28 08:47:36,478 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 88 transitions. Word has length 55 [2020-10-28 08:47:36,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:47:36,478 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 88 transitions. [2020-10-28 08:47:36,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 08:47:36,482 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 88 transitions. [2020-10-28 08:47:36,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-28 08:47:36,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:47:36,491 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:47:36,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 08:47:36,492 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:47:36,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:47:36,493 INFO L82 PathProgramCache]: Analyzing trace with hash 597490525, now seen corresponding path program 2 times [2020-10-28 08:47:36,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:47:36,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1555125118] [2020-10-28 08:47:36,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:47:36,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:36,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:37,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:39,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:41,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:42,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:42,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 08:47:42,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:47:42,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5489 [2020-10-28 08:47:42,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:42,075 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:42,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-28 08:47:42,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:47:42,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-28 08:47:42,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:47:45,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:47:45,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:45,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:45,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:45,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:47:45,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:47:45,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 08:47:45,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:45,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:45,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:47:45,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:47:45,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:47:45,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:47:45,472 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 08:47:45,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1555125118] [2020-10-28 08:47:45,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:47:45,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-28 08:47:45,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507262438] [2020-10-28 08:47:45,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-28 08:47:45,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:47:45,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-28 08:47:45,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2055, Unknown=0, NotChecked=0, Total=2162 [2020-10-28 08:47:45,477 INFO L87 Difference]: Start difference. First operand 78 states and 88 transitions. Second operand 47 states. [2020-10-28 08:47:51,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:47:51,809 INFO L93 Difference]: Finished difference Result 140 states and 159 transitions. [2020-10-28 08:47:51,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-28 08:47:51,810 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 77 [2020-10-28 08:47:51,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:47:51,813 INFO L225 Difference]: With dead ends: 140 [2020-10-28 08:47:51,813 INFO L226 Difference]: Without dead ends: 134 [2020-10-28 08:47:51,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=303, Invalid=5703, Unknown=0, NotChecked=0, Total=6006 [2020-10-28 08:47:51,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-28 08:47:51,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 131. [2020-10-28 08:47:51,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-28 08:47:51,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 150 transitions. [2020-10-28 08:47:51,841 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 150 transitions. Word has length 77 [2020-10-28 08:47:51,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:47:51,842 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 150 transitions. [2020-10-28 08:47:51,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-28 08:47:51,842 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 150 transitions. [2020-10-28 08:47:51,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 08:47:51,845 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:47:51,845 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:47:51,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 08:47:51,845 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:47:51,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:47:51,846 INFO L82 PathProgramCache]: Analyzing trace with hash 578659423, now seen corresponding path program 3 times [2020-10-28 08:47:51,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:47:51,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [468252372] [2020-10-28 08:47:51,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:47:51,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:51,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:51,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:51,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:52,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:52,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:52,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:53,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:56,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:56,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 08:47:56,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 08:47:56,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 08:47:56,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:56,881 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:56,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 08:47:56,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-28 08:47:56,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 08:47:56,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:47:57,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:47:57,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:57,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:57,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:57,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:47:57,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:47:57,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 08:47:57,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:57,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:57,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:47:57,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:47:57,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:47:57,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:47:57,048 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-28 08:47:57,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [468252372] [2020-10-28 08:47:57,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:47:57,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 08:47:57,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21547751] [2020-10-28 08:47:57,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 08:47:57,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:47:57,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 08:47:57,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:47:57,051 INFO L87 Difference]: Start difference. First operand 131 states and 150 transitions. Second operand 10 states. [2020-10-28 08:47:58,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:47:58,145 INFO L93 Difference]: Finished difference Result 267 states and 313 transitions. [2020-10-28 08:47:58,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 08:47:58,146 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 79 [2020-10-28 08:47:58,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:47:58,154 INFO L225 Difference]: With dead ends: 267 [2020-10-28 08:47:58,155 INFO L226 Difference]: Without dead ends: 160 [2020-10-28 08:47:58,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:47:58,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-28 08:47:58,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 149. [2020-10-28 08:47:58,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-28 08:47:58,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 168 transitions. [2020-10-28 08:47:58,206 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 168 transitions. Word has length 79 [2020-10-28 08:47:58,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:47:58,211 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 168 transitions. [2020-10-28 08:47:58,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 08:47:58,212 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 168 transitions. [2020-10-28 08:47:58,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 08:47:58,214 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:47:58,214 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:47:58,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 08:47:58,216 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:47:58,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:47:58,219 INFO L82 PathProgramCache]: Analyzing trace with hash 11247135, now seen corresponding path program 4 times [2020-10-28 08:47:58,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:47:58,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [858548883] [2020-10-28 08:47:58,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:47:58,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:58,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:58,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:58,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:58,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:58,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:58,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:58,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:03,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:03,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 08:48:03,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 08:48:03,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 08:48:03,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:03,261 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:03,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 08:48:03,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:48:03,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-28 08:48:03,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:48:03,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:48:03,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:03,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:03,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:03,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:48:03,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:48:03,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:48:03,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:03,391 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:03,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:48:03,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:48:03,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:48:03,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:48:03,405 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-28 08:48:03,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [858548883] [2020-10-28 08:48:03,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:48:03,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 08:48:03,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117186077] [2020-10-28 08:48:03,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 08:48:03,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:48:03,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 08:48:03,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:48:03,408 INFO L87 Difference]: Start difference. First operand 149 states and 168 transitions. Second operand 10 states. [2020-10-28 08:48:04,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:48:04,129 INFO L93 Difference]: Finished difference Result 251 states and 280 transitions. [2020-10-28 08:48:04,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 08:48:04,130 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 79 [2020-10-28 08:48:04,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:48:04,132 INFO L225 Difference]: With dead ends: 251 [2020-10-28 08:48:04,132 INFO L226 Difference]: Without dead ends: 111 [2020-10-28 08:48:04,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:48:04,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-28 08:48:04,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 100. [2020-10-28 08:48:04,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-28 08:48:04,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2020-10-28 08:48:04,151 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 79 [2020-10-28 08:48:04,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:48:04,151 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2020-10-28 08:48:04,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 08:48:04,151 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2020-10-28 08:48:04,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-28 08:48:04,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:48:04,153 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:48:04,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 08:48:04,153 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:48:04,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:48:04,154 INFO L82 PathProgramCache]: Analyzing trace with hash 486600819, now seen corresponding path program 5 times [2020-10-28 08:48:04,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:48:04,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1141560342] [2020-10-28 08:48:04,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:48:04,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:04,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:06,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:07,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:10,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:10,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-28 08:48:10,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:48:10,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5825 [2020-10-28 08:48:10,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:10,113 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:10,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 64 [2020-10-28 08:48:10,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:48:10,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-28 08:48:10,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:48:15,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:48:15,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:15,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:15,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:15,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:48:15,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:48:15,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:48:15,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:15,974 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:15,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:48:15,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:48:15,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:48:15,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:48:16,064 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 08:48:16,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1141560342] [2020-10-28 08:48:16,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:48:16,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-28 08:48:16,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201457124] [2020-10-28 08:48:16,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-28 08:48:16,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:48:16,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-28 08:48:16,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=3178, Unknown=0, NotChecked=0, Total=3306 [2020-10-28 08:48:16,069 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand 58 states. [2020-10-28 08:48:21,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:48:21,743 INFO L93 Difference]: Finished difference Result 186 states and 205 transitions. [2020-10-28 08:48:21,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-28 08:48:21,743 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 99 [2020-10-28 08:48:21,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:48:21,746 INFO L225 Difference]: With dead ends: 186 [2020-10-28 08:48:21,747 INFO L226 Difference]: Without dead ends: 180 [2020-10-28 08:48:21,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 5 SyntacticMatches, 6 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=138, Invalid=3402, Unknown=0, NotChecked=0, Total=3540 [2020-10-28 08:48:21,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-28 08:48:21,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 169. [2020-10-28 08:48:21,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-28 08:48:21,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 188 transitions. [2020-10-28 08:48:21,775 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 188 transitions. Word has length 99 [2020-10-28 08:48:21,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:48:21,775 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 188 transitions. [2020-10-28 08:48:21,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-28 08:48:21,776 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 188 transitions. [2020-10-28 08:48:21,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-28 08:48:21,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:48:21,783 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:48:21,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 08:48:21,784 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:48:21,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:48:21,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1595511819, now seen corresponding path program 6 times [2020-10-28 08:48:21,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:48:21,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1796360360] [2020-10-28 08:48:21,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:48:21,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:21,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:21,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:21,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:22,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:22,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:22,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:24,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:26,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:26,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-28 08:48:26,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 08:48:26,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 08:48:26,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:26,830 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:26,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 08:48:26,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 08:48:26,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 08:48:26,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:48:27,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:48:27,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:27,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:27,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:27,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:48:27,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:48:27,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:48:27,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:27,013 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:27,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:48:27,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:48:27,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:48:27,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:48:27,031 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-28 08:48:27,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1796360360] [2020-10-28 08:48:27,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:48:27,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 08:48:27,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398262715] [2020-10-28 08:48:27,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 08:48:27,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:48:27,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 08:48:27,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:48:27,035 INFO L87 Difference]: Start difference. First operand 169 states and 188 transitions. Second operand 12 states. [2020-10-28 08:48:28,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:48:28,558 INFO L93 Difference]: Finished difference Result 341 states and 387 transitions. [2020-10-28 08:48:28,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 08:48:28,559 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 101 [2020-10-28 08:48:28,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:48:28,561 INFO L225 Difference]: With dead ends: 341 [2020-10-28 08:48:28,562 INFO L226 Difference]: Without dead ends: 202 [2020-10-28 08:48:28,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2020-10-28 08:48:28,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-28 08:48:28,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 187. [2020-10-28 08:48:28,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-28 08:48:28,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 206 transitions. [2020-10-28 08:48:28,582 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 206 transitions. Word has length 101 [2020-10-28 08:48:28,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:48:28,583 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 206 transitions. [2020-10-28 08:48:28,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 08:48:28,583 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 206 transitions. [2020-10-28 08:48:28,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-28 08:48:28,584 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:48:28,584 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:48:28,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 08:48:28,585 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:48:28,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:48:28,585 INFO L82 PathProgramCache]: Analyzing trace with hash 820422069, now seen corresponding path program 7 times [2020-10-28 08:48:28,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:48:28,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730912587] [2020-10-28 08:48:28,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:48:28,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:28,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:28,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:28,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:28,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:28,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:28,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:29,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:33,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:33,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-28 08:48:33,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 08:48:33,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 08:48:33,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:33,620 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:33,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 08:48:33,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:48:33,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-28 08:48:33,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:48:33,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:48:33,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:33,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:33,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:33,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:48:33,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:48:33,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:48:33,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:33,775 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:33,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:48:33,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:48:33,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:48:33,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:48:33,790 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-28 08:48:33,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730912587] [2020-10-28 08:48:33,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:48:33,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 08:48:33,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513495345] [2020-10-28 08:48:33,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 08:48:33,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:48:33,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 08:48:33,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:48:33,793 INFO L87 Difference]: Start difference. First operand 187 states and 206 transitions. Second operand 12 states. [2020-10-28 08:48:34,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:48:34,785 INFO L93 Difference]: Finished difference Result 311 states and 340 transitions. [2020-10-28 08:48:34,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 08:48:34,786 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 101 [2020-10-28 08:48:34,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:48:34,787 INFO L225 Difference]: With dead ends: 311 [2020-10-28 08:48:34,787 INFO L226 Difference]: Without dead ends: 133 [2020-10-28 08:48:34,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:48:34,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-28 08:48:34,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 122. [2020-10-28 08:48:34,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-28 08:48:34,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 132 transitions. [2020-10-28 08:48:34,802 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 132 transitions. Word has length 101 [2020-10-28 08:48:34,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:48:34,803 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 132 transitions. [2020-10-28 08:48:34,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 08:48:34,803 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 132 transitions. [2020-10-28 08:48:34,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-28 08:48:34,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:48:34,808 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:48:34,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 08:48:34,808 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:48:34,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:48:34,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1822158583, now seen corresponding path program 8 times [2020-10-28 08:48:34,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:48:34,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1697449962] [2020-10-28 08:48:34,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:48:34,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:35,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:37,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:40,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:40,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-28 08:48:40,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:48:40,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5212 [2020-10-28 08:48:40,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:40,197 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:40,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 90 [2020-10-28 08:48:40,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:48:40,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-28 08:48:40,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:48:55,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:48:55,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:55,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:55,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:55,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:48:55,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:48:55,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:48:55,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:55,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:55,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:48:55,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:48:55,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:48:55,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:48:56,064 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:48:56,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1697449962] [2020-10-28 08:48:56,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:48:56,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92] total 92 [2020-10-28 08:48:56,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738395145] [2020-10-28 08:48:56,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-10-28 08:48:56,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:48:56,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-10-28 08:48:56,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=8104, Unknown=0, NotChecked=0, Total=8372 [2020-10-28 08:48:56,071 INFO L87 Difference]: Start difference. First operand 122 states and 132 transitions. Second operand 92 states. [2020-10-28 08:48:59,569 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 75 [2020-10-28 08:48:59,937 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2020-10-28 08:49:00,492 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2020-10-28 08:49:03,774 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 30 [2020-10-28 08:49:04,180 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 33 [2020-10-28 08:49:07,324 WARN L193 SmtUtils]: Spent 2.47 s on a formula simplification. DAG size of input: 81 DAG size of output: 80 [2020-10-28 08:49:07,913 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2020-10-28 08:49:08,700 WARN L193 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2020-10-28 08:49:09,692 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 39 [2020-10-28 08:49:10,309 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 36 [2020-10-28 08:49:11,566 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 39 [2020-10-28 08:49:12,187 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 34 [2020-10-28 08:49:12,727 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 36 [2020-10-28 08:49:13,708 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-10-28 08:49:14,170 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2020-10-28 08:49:15,293 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2020-10-28 08:49:17,102 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-10-28 08:49:17,549 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2020-10-28 08:49:18,367 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2020-10-28 08:49:19,367 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 44 [2020-10-28 08:49:19,862 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-10-28 08:49:20,787 WARN L193 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2020-10-28 08:49:21,557 WARN L193 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2020-10-28 08:49:22,539 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2020-10-28 08:49:23,057 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 39 [2020-10-28 08:49:23,780 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-10-28 08:49:24,649 WARN L193 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-10-28 08:49:25,502 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-10-28 08:49:41,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:49:41,387 INFO L93 Difference]: Finished difference Result 281 states and 311 transitions. [2020-10-28 08:49:41,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2020-10-28 08:49:41,389 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 121 [2020-10-28 08:49:41,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:49:41,392 INFO L225 Difference]: With dead ends: 281 [2020-10-28 08:49:41,392 INFO L226 Difference]: Without dead ends: 275 [2020-10-28 08:49:41,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5209 ImplicationChecksByTransitivity, 44.0s TimeCoverageRelationStatistics Valid=1032, Invalid=28724, Unknown=0, NotChecked=0, Total=29756 [2020-10-28 08:49:41,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-10-28 08:49:41,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 217. [2020-10-28 08:49:41,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-10-28 08:49:41,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 237 transitions. [2020-10-28 08:49:41,423 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 237 transitions. Word has length 121 [2020-10-28 08:49:41,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:49:41,424 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 237 transitions. [2020-10-28 08:49:41,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 92 states. [2020-10-28 08:49:41,424 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 237 transitions. [2020-10-28 08:49:41,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-28 08:49:41,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:49:41,426 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:49:41,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 08:49:41,426 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:49:41,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:49:41,427 INFO L82 PathProgramCache]: Analyzing trace with hash 453082891, now seen corresponding path program 9 times [2020-10-28 08:49:41,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:49:41,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1651320753] [2020-10-28 08:49:41,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:49:41,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:49:41,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:41,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:41,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:41,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:41,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:42,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:46,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:49:46,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-28 08:49:46,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:49:46,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 08:49:46,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:49:46,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:49:46,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 08:49:46,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-28 08:49:46,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 08:49:46,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:49:46,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:49:46,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:49:46,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:46,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:49:46,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:49:46,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:49:46,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:49:46,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:49:46,738 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:49:46,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:49:46,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:49:46,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:49:46,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:49:46,757 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-28 08:49:46,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1651320753] [2020-10-28 08:49:46,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:49:46,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 08:49:46,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524092805] [2020-10-28 08:49:46,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 08:49:46,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:49:46,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 08:49:46,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:49:46,760 INFO L87 Difference]: Start difference. First operand 217 states and 237 transitions. Second operand 14 states. [2020-10-28 08:49:49,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:49:49,804 INFO L93 Difference]: Finished difference Result 340 states and 378 transitions. [2020-10-28 08:49:49,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 08:49:49,805 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 123 [2020-10-28 08:49:49,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:49:49,807 INFO L225 Difference]: With dead ends: 340 [2020-10-28 08:49:49,807 INFO L226 Difference]: Without dead ends: 244 [2020-10-28 08:49:49,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2020-10-28 08:49:49,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-28 08:49:49,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 225. [2020-10-28 08:49:49,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2020-10-28 08:49:49,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 244 transitions. [2020-10-28 08:49:49,834 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 244 transitions. Word has length 123 [2020-10-28 08:49:49,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:49:49,834 INFO L481 AbstractCegarLoop]: Abstraction has 225 states and 244 transitions. [2020-10-28 08:49:49,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 08:49:49,834 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 244 transitions. [2020-10-28 08:49:49,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-28 08:49:49,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:49:49,836 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:49:49,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 08:49:49,837 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:49:49,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:49:49,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1694238517, now seen corresponding path program 10 times [2020-10-28 08:49:49,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:49:49,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1712946716] [2020-10-28 08:49:49,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:49:49,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:49:49,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:49,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:49,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:50,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:50,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:50,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:51,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:54,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:49:54,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-28 08:49:54,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 08:49:54,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 08:49:54,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:49:54,880 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:49:54,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 08:49:54,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:49:54,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-28 08:49:54,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:49:55,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:49:55,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:49:55,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:55,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:49:55,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:49:55,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:49:55,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:49:55,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:49:55,157 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:49:55,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:49:55,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:49:55,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:49:55,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:49:55,181 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-28 08:49:55,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1712946716] [2020-10-28 08:49:55,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:49:55,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 08:49:55,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927236509] [2020-10-28 08:49:55,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 08:49:55,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:49:55,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 08:49:55,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:49:55,184 INFO L87 Difference]: Start difference. First operand 225 states and 244 transitions. Second operand 14 states. [2020-10-28 08:49:56,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:49:56,844 INFO L93 Difference]: Finished difference Result 371 states and 400 transitions. [2020-10-28 08:49:56,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 08:49:56,846 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 123 [2020-10-28 08:49:56,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:49:56,848 INFO L225 Difference]: With dead ends: 371 [2020-10-28 08:49:56,848 INFO L226 Difference]: Without dead ends: 155 [2020-10-28 08:49:56,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2020-10-28 08:49:56,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-28 08:49:56,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 144. [2020-10-28 08:49:56,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-28 08:49:56,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 154 transitions. [2020-10-28 08:49:56,864 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 154 transitions. Word has length 123 [2020-10-28 08:49:56,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:49:56,865 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 154 transitions. [2020-10-28 08:49:56,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 08:49:56,865 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 154 transitions. [2020-10-28 08:49:56,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-28 08:49:56,866 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:49:56,866 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:49:56,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 08:49:56,867 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:49:56,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:49:56,867 INFO L82 PathProgramCache]: Analyzing trace with hash 858307871, now seen corresponding path program 11 times [2020-10-28 08:49:56,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:49:56,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2054377435] [2020-10-28 08:49:56,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:49:57,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:49:57,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:50:02,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:50:02,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-28 08:50:02,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:50:02,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5139 [2020-10-28 08:50:02,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:50:02,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:50:02,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 111 [2020-10-28 08:50:02,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:50:02,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 137 [2020-10-28 08:50:02,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:50:06,957 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-10-28 08:50:07,233 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-10-28 08:50:09,157 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-10-28 08:50:09,514 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-10-28 08:50:42,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:50:42,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:50:42,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:50:42,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:50:42,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:50:42,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:50:42,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:50:42,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:50:42,054 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:50:42,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:50:42,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:50:42,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:50:42,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:50:42,338 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:50:42,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2054377435] [2020-10-28 08:50:42,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:50:42,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [113] total 113 [2020-10-28 08:50:42,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50830636] [2020-10-28 08:50:42,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 113 states [2020-10-28 08:50:42,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:50:42,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2020-10-28 08:50:42,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=12268, Unknown=0, NotChecked=0, Total=12656 [2020-10-28 08:50:42,344 INFO L87 Difference]: Start difference. First operand 144 states and 154 transitions. Second operand 113 states. [2020-10-28 08:50:51,543 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-10-28 08:50:53,180 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2020-10-28 08:50:58,078 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2020-10-28 08:50:59,557 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61