/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=DEEPEST --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_sum4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:07:27,978 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:07:27,982 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:07:28,044 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:07:28,045 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:07:28,051 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:07:28,055 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:07:28,059 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:07:28,063 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:07:28,071 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:07:28,073 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:07:28,074 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:07:28,075 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:07:28,079 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:07:28,083 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:07:28,086 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:07:28,087 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:07:28,091 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:07:28,100 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:07:28,108 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:07:28,130 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:07:28,132 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:07:28,133 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:07:28,135 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:07:28,138 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:07:28,138 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:07:28,138 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:07:28,140 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:07:28,140 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:07:28,141 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:07:28,142 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:07:28,143 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:07:28,144 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:07:28,145 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:07:28,146 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:07:28,147 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:07:28,147 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:07:28,148 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:07:28,148 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:07:28,149 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:07:28,150 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:07:28,151 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 [2020-10-27 14:07:28,193 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:07:28,196 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:07:28,198 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:07:28,198 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:07:28,198 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:07:28,199 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:07:28,199 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:07:28,199 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:07:28,199 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:07:28,200 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:07:28,200 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:07:28,200 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:07:28,200 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:07:28,201 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:07:28,201 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:07:28,201 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:07:28,201 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:07:28,202 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:07:28,202 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:07:28,202 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:07:28,202 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:07:28,203 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:07:28,203 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:07:28,203 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:07:28,203 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:07:28,204 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:07:28,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:07:28,204 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:07:28,204 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:07:28,204 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:07:28,574 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:07:28,623 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:07:28,625 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:07:28,627 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:07:28,627 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:07:28,628 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum4.c [2020-10-27 14:07:28,717 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e112591f9/1a422300a41d4010ab4813c197c7a4e7/FLAG70c05b693 [2020-10-27 14:07:29,392 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:07:29,393 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/zero_sum4.c [2020-10-27 14:07:29,405 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e112591f9/1a422300a41d4010ab4813c197c7a4e7/FLAG70c05b693 [2020-10-27 14:07:29,774 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e112591f9/1a422300a41d4010ab4813c197c7a4e7 [2020-10-27 14:07:29,779 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:07:29,788 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:07:29,793 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:07:29,794 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:07:29,799 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:07:29,800 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:07:29" (1/1) ... [2020-10-27 14:07:29,807 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66958e49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:29, skipping insertion in model container [2020-10-27 14:07:29,808 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:07:29" (1/1) ... [2020-10-27 14:07:29,818 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:07:29,842 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:07:30,112 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:07:30,121 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:07:30,148 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:07:30,166 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:07:30,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:30 WrapperNode [2020-10-27 14:07:30,166 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:07:30,168 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:07:30,168 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:07:30,168 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:07:30,182 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:30" (1/1) ... [2020-10-27 14:07:30,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:30" (1/1) ... [2020-10-27 14:07:30,191 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:30" (1/1) ... [2020-10-27 14:07:30,191 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:30" (1/1) ... [2020-10-27 14:07:30,202 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:30" (1/1) ... [2020-10-27 14:07:30,210 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:30" (1/1) ... [2020-10-27 14:07:30,212 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:30" (1/1) ... [2020-10-27 14:07:30,218 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:07:30,219 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:07:30,219 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:07:30,220 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:07:30,221 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:30" (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 [2020-10-27 14:07:30,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:07:30,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:07:30,303 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:07:30,304 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 14:07:30,304 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:07:30,304 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:07:30,304 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:07:30,304 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:07:30,305 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:07:30,305 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:07:30,305 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 14:07:30,305 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:07:30,305 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2020-10-27 14:07:30,305 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:07:30,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:07:30,306 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:07:30,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:07:30,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:07:30,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:07:30,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:07:30,797 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:07:30,798 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-27 14:07:30,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:07:30 BoogieIcfgContainer [2020-10-27 14:07:30,802 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:07:30,804 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:07:30,804 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:07:30,813 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:07:30,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:07:29" (1/3) ... [2020-10-27 14:07:30,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@329a9479 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:07:30, skipping insertion in model container [2020-10-27 14:07:30,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:30" (2/3) ... [2020-10-27 14:07:30,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@329a9479 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:07:30, skipping insertion in model container [2020-10-27 14:07:30,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:07:30" (3/3) ... [2020-10-27 14:07:30,818 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum4.c [2020-10-27 14:07:30,828 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:07:30,832 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:07:30,843 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:07:30,870 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:07:30,870 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:07:30,870 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:07:30,870 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:07:30,871 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:07:30,871 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:07:30,871 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:07:30,871 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:07:30,892 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2020-10-27 14:07:30,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 14:07:30,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:07:30,900 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] [2020-10-27 14:07:30,901 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:07:30,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:07:30,908 INFO L82 PathProgramCache]: Analyzing trace with hash 784075536, now seen corresponding path program 1 times [2020-10-27 14:07:30,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:07:30,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1057490019] [2020-10-27 14:07:30,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:07:31,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:31,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:31,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:31,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:31,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:31,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:31,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:31,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:31,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:31,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:32,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:35,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:35,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 14:07:35,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 14:07:35,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4164 [2020-10-27 14:07:35,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:35,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:35,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:07:35,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:35,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:07:35,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:07:35,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:35,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:35,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:35,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:07:35,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:35,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 14:07:35,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:35,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:35,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:07:35,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:35,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:35,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:07:35,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1057490019] [2020-10-27 14:07:35,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:07:35,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 14:07:35,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727976972] [2020-10-27 14:07:35,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 14:07:35,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:07:35,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 14:07:35,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:07:35,395 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 3 states. [2020-10-27 14:07:35,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:07:35,553 INFO L93 Difference]: Finished difference Result 88 states and 125 transitions. [2020-10-27 14:07:35,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 14:07:35,557 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-10-27 14:07:35,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:07:35,566 INFO L225 Difference]: With dead ends: 88 [2020-10-27 14:07:35,566 INFO L226 Difference]: Without dead ends: 39 [2020-10-27 14:07:35,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:07:35,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-27 14:07:35,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-27 14:07:35,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 14:07:35,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2020-10-27 14:07:35,643 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 29 [2020-10-27 14:07:35,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:07:35,644 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2020-10-27 14:07:35,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 14:07:35,644 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2020-10-27 14:07:35,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 14:07:35,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:07:35,647 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] [2020-10-27 14:07:35,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:07:35,648 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:07:35,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:07:35,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1811168738, now seen corresponding path program 1 times [2020-10-27 14:07:35,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:07:35,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [607908905] [2020-10-27 14:07:35,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:07:35,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:35,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:35,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:35,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:35,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:35,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:35,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:35,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:35,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:36,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:38,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:40,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:40,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 14:07:40,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 14:07:40,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:07:40,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:40,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:07:40,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:07:40,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:07:40,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 14:07:40,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:07:40,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:40,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:40,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:40,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:07:40,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:40,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 14:07:40,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:40,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:40,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:07:40,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:40,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:07:40,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:07:40,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [607908905] [2020-10-27 14:07:40,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:07:40,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 14:07:40,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122110795] [2020-10-27 14:07:40,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:07:40,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:07:40,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:07:40,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:07:40,834 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 5 states. [2020-10-27 14:07:41,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:07:41,191 INFO L93 Difference]: Finished difference Result 82 states and 104 transitions. [2020-10-27 14:07:41,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:07:41,191 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-10-27 14:07:41,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:07:41,195 INFO L225 Difference]: With dead ends: 82 [2020-10-27 14:07:41,195 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 14:07:41,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:07:41,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 14:07:41,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 47. [2020-10-27 14:07:41,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 14:07:41,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-10-27 14:07:41,223 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 29 [2020-10-27 14:07:41,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:07:41,223 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-10-27 14:07:41,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:07:41,224 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-10-27 14:07:41,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 14:07:41,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:07:41,227 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] [2020-10-27 14:07:41,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:07:41,227 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:07:41,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:07:41,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1846873870, now seen corresponding path program 1 times [2020-10-27 14:07:41,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:07:41,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1190426460] [2020-10-27 14:07:41,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:07:41,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:41,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:41,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:41,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:41,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:41,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:41,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:41,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:42,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:46,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:46,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 14:07:46,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 14:07:46,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:07:46,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:46,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:07:46,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:07:46,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 14:07:46,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:46,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:07:46,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:46,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:46,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:46,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:07:46,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:46,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:07:46,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:46,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:46,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:07:46,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:46,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:46,412 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 14:07:46,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1190426460] [2020-10-27 14:07:46,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:07:46,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 14:07:46,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742265245] [2020-10-27 14:07:46,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 14:07:46,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:07:46,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 14:07:46,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:07:46,421 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 6 states. [2020-10-27 14:07:46,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:07:46,792 INFO L93 Difference]: Finished difference Result 97 states and 119 transitions. [2020-10-27 14:07:46,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 14:07:46,793 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2020-10-27 14:07:46,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:07:46,795 INFO L225 Difference]: With dead ends: 97 [2020-10-27 14:07:46,795 INFO L226 Difference]: Without dead ends: 63 [2020-10-27 14:07:46,796 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 [2020-10-27 14:07:46,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-27 14:07:46,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-27 14:07:46,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-27 14:07:46,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2020-10-27 14:07:46,821 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 45 [2020-10-27 14:07:46,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:07:46,821 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2020-10-27 14:07:46,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 14:07:46,822 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2020-10-27 14:07:46,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 14:07:46,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:07:46,825 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:07:46,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:07:46,826 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:07:46,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:07:46,827 INFO L82 PathProgramCache]: Analyzing trace with hash -350043134, now seen corresponding path program 2 times [2020-10-27 14:07:46,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:07:46,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [529117711] [2020-10-27 14:07:46,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:07:46,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:46,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:46,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:47,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:48,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:49,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:51,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:51,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 14:07:51,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:07:51,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-27 14:07:51,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:51,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-27 14:07:51,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:07:51,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 14:07:51,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 14:07:53,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:07:53,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:53,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:53,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:53,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:07:53,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:53,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:07:53,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:53,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:53,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:07:53,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:53,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:53,373 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:07:53,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [529117711] [2020-10-27 14:07:53,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:07:53,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 14:07:53,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962455827] [2020-10-27 14:07:53,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 14:07:53,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:07:53,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 14:07:53,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:07:53,379 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand 31 states. [2020-10-27 14:07:54,063 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2020-10-27 14:07:55,009 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2020-10-27 14:07:56,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:07:56,273 INFO L93 Difference]: Finished difference Result 113 states and 128 transitions. [2020-10-27 14:07:56,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 14:07:56,274 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 61 [2020-10-27 14:07:56,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:07:56,276 INFO L225 Difference]: With dead ends: 113 [2020-10-27 14:07:56,277 INFO L226 Difference]: Without dead ends: 107 [2020-10-27 14:07:56,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 10 SyntacticMatches, 6 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=220, Invalid=1760, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 14:07:56,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-27 14:07:56,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 104. [2020-10-27 14:07:56,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-27 14:07:56,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 119 transitions. [2020-10-27 14:07:56,313 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 119 transitions. Word has length 61 [2020-10-27 14:07:56,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:07:56,314 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 119 transitions. [2020-10-27 14:07:56,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 14:07:56,314 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 119 transitions. [2020-10-27 14:07:56,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 14:07:56,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:07:56,319 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:07:56,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:07:56,322 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:07:56,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:07:56,323 INFO L82 PathProgramCache]: Analyzing trace with hash 991755204, now seen corresponding path program 3 times [2020-10-27 14:07:56,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:07:56,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [957559850] [2020-10-27 14:07:56,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:07:56,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:56,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:56,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:56,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:56,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:56,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:56,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:01,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:01,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:01,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 14:08:01,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:08:01,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 14:08:01,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:01,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:08:01,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-27 14:08:01,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:08:01,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:01,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:01,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:01,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:01,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:01,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:01,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:01,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:08:01,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:01,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:01,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:01,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:01,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:01,462 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-27 14:08:01,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [957559850] [2020-10-27 14:08:01,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:01,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:08:01,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784901300] [2020-10-27 14:08:01,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:08:01,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:01,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:08:01,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:08:01,465 INFO L87 Difference]: Start difference. First operand 104 states and 119 transitions. Second operand 10 states. [2020-10-27 14:08:02,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:08:02,118 INFO L93 Difference]: Finished difference Result 163 states and 190 transitions. [2020-10-27 14:08:02,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 14:08:02,119 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 63 [2020-10-27 14:08:02,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:08:02,120 INFO L225 Difference]: With dead ends: 163 [2020-10-27 14:08:02,120 INFO L226 Difference]: Without dead ends: 121 [2020-10-27 14:08:02,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:08:02,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-27 14:08:02,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 110. [2020-10-27 14:08:02,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-27 14:08:02,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 124 transitions. [2020-10-27 14:08:02,154 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 124 transitions. Word has length 63 [2020-10-27 14:08:02,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:08:02,155 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 124 transitions. [2020-10-27 14:08:02,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:08:02,155 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 124 transitions. [2020-10-27 14:08:02,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 14:08:02,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:08:02,157 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:08:02,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:08:02,157 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:08:02,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:08:02,158 INFO L82 PathProgramCache]: Analyzing trace with hash -951692028, now seen corresponding path program 4 times [2020-10-27 14:08:02,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:08:02,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [109467343] [2020-10-27 14:08:02,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:08:02,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:02,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:02,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:02,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:02,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:02,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:02,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:02,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:07,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:07,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 14:08:07,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:08:07,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:08:07,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:07,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:08:07,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-27 14:08:07,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 14:08:07,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:07,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:07,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:07,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:07,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:07,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:07,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:07,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:08:07,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:07,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:07,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:07,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:07,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:07,312 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-27 14:08:07,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [109467343] [2020-10-27 14:08:07,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:07,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:08:07,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376348636] [2020-10-27 14:08:07,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:08:07,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:07,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:08:07,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:08:07,315 INFO L87 Difference]: Start difference. First operand 110 states and 124 transitions. Second operand 10 states. [2020-10-27 14:08:07,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:08:07,790 INFO L93 Difference]: Finished difference Result 185 states and 206 transitions. [2020-10-27 14:08:07,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:08:07,791 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 63 [2020-10-27 14:08:07,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:08:07,793 INFO L225 Difference]: With dead ends: 185 [2020-10-27 14:08:07,793 INFO L226 Difference]: Without dead ends: 87 [2020-10-27 14:08:07,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:08:07,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-27 14:08:07,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 79. [2020-10-27 14:08:07,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-27 14:08:07,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2020-10-27 14:08:07,807 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 63 [2020-10-27 14:08:07,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:08:07,807 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2020-10-27 14:08:07,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:08:07,808 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2020-10-27 14:08:07,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 14:08:07,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:08:07,809 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 14:08:07,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:08:07,809 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:08:07,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:08:07,810 INFO L82 PathProgramCache]: Analyzing trace with hash -904153326, now seen corresponding path program 5 times [2020-10-27 14:08:07,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:08:07,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857099553] [2020-10-27 14:08:07,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:08:07,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:07,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:07,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:08,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:09,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:11,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:12,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:12,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 14:08:12,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:08:12,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:08:12,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:12,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-27 14:08:12,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:08:12,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-27 14:08:12,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:15,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:15,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:15,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:15,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:15,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:15,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:15,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:08:15,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:15,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:15,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:15,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:15,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:15,530 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:08:15,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857099553] [2020-10-27 14:08:15,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:15,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-27 14:08:15,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47554518] [2020-10-27 14:08:15,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-27 14:08:15,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:15,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-27 14:08:15,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1677, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 14:08:15,533 INFO L87 Difference]: Start difference. First operand 79 states and 87 transitions. Second operand 43 states. [2020-10-27 14:08:16,591 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2020-10-27 14:08:17,238 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2020-10-27 14:08:18,109 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 77 [2020-10-27 14:08:20,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:08:20,405 INFO L93 Difference]: Finished difference Result 143 states and 158 transitions. [2020-10-27 14:08:20,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 14:08:20,406 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 77 [2020-10-27 14:08:20,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:08:20,408 INFO L225 Difference]: With dead ends: 143 [2020-10-27 14:08:20,408 INFO L226 Difference]: Without dead ends: 137 [2020-10-27 14:08:20,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 8 SyntacticMatches, 10 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=268, Invalid=3154, Unknown=0, NotChecked=0, Total=3422 [2020-10-27 14:08:20,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-27 14:08:20,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 132. [2020-10-27 14:08:20,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-27 14:08:20,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 147 transitions. [2020-10-27 14:08:20,436 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 147 transitions. Word has length 77 [2020-10-27 14:08:20,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:08:20,437 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 147 transitions. [2020-10-27 14:08:20,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-27 14:08:20,437 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 147 transitions. [2020-10-27 14:08:20,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-27 14:08:20,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:08:20,438 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-10-27 14:08:20,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:08:20,439 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:08:20,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:08:20,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1655790292, now seen corresponding path program 6 times [2020-10-27 14:08:20,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:08:20,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [385935811] [2020-10-27 14:08:20,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:08:20,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:20,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:20,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:20,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:20,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:20,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:21,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:25,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:25,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 14:08:25,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:08:25,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 14:08:25,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:25,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:08:25,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-27 14:08:25,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 14:08:25,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:25,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:25,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:25,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:25,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:25,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:25,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:25,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:08:25,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:25,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:25,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:25,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:25,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:25,585 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-10-27 14:08:25,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [385935811] [2020-10-27 14:08:25,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:25,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:08:25,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133307431] [2020-10-27 14:08:25,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:08:25,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:25,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:08:25,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:08:25,588 INFO L87 Difference]: Start difference. First operand 132 states and 147 transitions. Second operand 12 states. [2020-10-27 14:08:26,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:08:26,553 INFO L93 Difference]: Finished difference Result 205 states and 232 transitions. [2020-10-27 14:08:26,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:08:26,554 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 79 [2020-10-27 14:08:26,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:08:26,555 INFO L225 Difference]: With dead ends: 205 [2020-10-27 14:08:26,555 INFO L226 Difference]: Without dead ends: 151 [2020-10-27 14:08:26,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:08:26,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-27 14:08:26,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 136. [2020-10-27 14:08:26,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-27 14:08:26,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 150 transitions. [2020-10-27 14:08:26,593 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 150 transitions. Word has length 79 [2020-10-27 14:08:26,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:08:26,594 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 150 transitions. [2020-10-27 14:08:26,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:08:26,594 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 150 transitions. [2020-10-27 14:08:26,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-27 14:08:26,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:08:26,596 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-10-27 14:08:26,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:08:26,596 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:08:26,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:08:26,597 INFO L82 PathProgramCache]: Analyzing trace with hash -875641836, now seen corresponding path program 7 times [2020-10-27 14:08:26,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:08:26,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1082119057] [2020-10-27 14:08:26,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:08:26,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:26,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:26,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:26,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:26,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:26,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:26,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:31,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:31,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 14:08:31,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:08:31,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:08:31,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:31,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:08:31,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-27 14:08:31,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:08:31,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:31,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:31,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:31,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:31,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:31,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:31,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:31,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:08:31,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:31,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:31,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:31,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:31,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:31,749 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-10-27 14:08:31,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1082119057] [2020-10-27 14:08:31,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:31,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:08:31,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458494746] [2020-10-27 14:08:31,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:08:31,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:31,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:08:31,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:08:31,759 INFO L87 Difference]: Start difference. First operand 136 states and 150 transitions. Second operand 12 states. [2020-10-27 14:08:32,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:08:32,529 INFO L93 Difference]: Finished difference Result 227 states and 248 transitions. [2020-10-27 14:08:32,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:08:32,530 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 79 [2020-10-27 14:08:32,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:08:32,531 INFO L225 Difference]: With dead ends: 227 [2020-10-27 14:08:32,531 INFO L226 Difference]: Without dead ends: 103 [2020-10-27 14:08:32,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:08:32,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-27 14:08:32,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 95. [2020-10-27 14:08:32,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-27 14:08:32,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 103 transitions. [2020-10-27 14:08:32,558 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 103 transitions. Word has length 79 [2020-10-27 14:08:32,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:08:32,559 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 103 transitions. [2020-10-27 14:08:32,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:08:32,559 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 103 transitions. [2020-10-27 14:08:32,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-27 14:08:32,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:08:32,560 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 14:08:32,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:08:32,561 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:08:32,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:08:32,561 INFO L82 PathProgramCache]: Analyzing trace with hash -44709342, now seen corresponding path program 8 times [2020-10-27 14:08:32,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:08:32,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [863866986] [2020-10-27 14:08:32,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:08:32,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:32,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:32,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:34,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:37,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:38,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:38,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-27 14:08:38,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:08:38,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6045 [2020-10-27 14:08:38,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:38,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:08:38,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:08:38,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 14:08:38,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:38,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:38,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:38,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:38,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:38,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:38,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:38,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:08:38,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:38,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:38,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:38,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:38,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:38,683 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-10-27 14:08:38,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [863866986] [2020-10-27 14:08:38,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:08:38,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:08:38,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129735059] [2020-10-27 14:08:38,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:08:38,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:38,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:08:38,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:08:38,686 INFO L87 Difference]: Start difference. First operand 95 states and 103 transitions. Second operand 4 states. [2020-10-27 14:08:38,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:08:38,811 INFO L93 Difference]: Finished difference Result 183 states and 199 transitions. [2020-10-27 14:08:38,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 14:08:38,812 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 93 [2020-10-27 14:08:38,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:08:38,813 INFO L225 Difference]: With dead ends: 183 [2020-10-27 14:08:38,813 INFO L226 Difference]: Without dead ends: 97 [2020-10-27 14:08:38,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:08:38,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-27 14:08:38,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2020-10-27 14:08:38,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-27 14:08:38,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 104 transitions. [2020-10-27 14:08:38,829 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 104 transitions. Word has length 93 [2020-10-27 14:08:38,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:08:38,829 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 104 transitions. [2020-10-27 14:08:38,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:08:38,829 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 104 transitions. [2020-10-27 14:08:38,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-27 14:08:38,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:08:38,832 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 14:08:38,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:08:38,832 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:08:38,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:08:38,833 INFO L82 PathProgramCache]: Analyzing trace with hash 437735716, now seen corresponding path program 1 times [2020-10-27 14:08:38,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:08:38,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [751691976] [2020-10-27 14:08:38,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:08:38,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:38,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:39,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:40,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:43,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:44,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:44,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-27 14:08:44,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:08:44,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5507 [2020-10-27 14:08:44,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:44,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 68 [2020-10-27 14:08:44,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:08:44,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-27 14:08:44,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:47,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:47,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:47,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:47,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:47,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:47,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:47,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:08:47,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:47,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:47,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:47,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:47,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:47,295 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:08:47,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [751691976] [2020-10-27 14:08:47,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:47,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 14:08:47,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837423196] [2020-10-27 14:08:47,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 14:08:47,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:47,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 14:08:47,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1102, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 14:08:47,298 INFO L87 Difference]: Start difference. First operand 96 states and 104 transitions. Second operand 35 states. [2020-10-27 14:08:49,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:08:49,657 INFO L93 Difference]: Finished difference Result 174 states and 189 transitions. [2020-10-27 14:08:49,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 14:08:49,658 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 95 [2020-10-27 14:08:49,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:08:49,660 INFO L225 Difference]: With dead ends: 174 [2020-10-27 14:08:49,660 INFO L226 Difference]: Without dead ends: 168 [2020-10-27 14:08:49,662 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 9 SyntacticMatches, 29 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=98, Invalid=1234, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:08:49,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-27 14:08:49,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 161. [2020-10-27 14:08:49,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-27 14:08:49,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 176 transitions. [2020-10-27 14:08:49,678 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 176 transitions. Word has length 95 [2020-10-27 14:08:49,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:08:49,678 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 176 transitions. [2020-10-27 14:08:49,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 14:08:49,679 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 176 transitions. [2020-10-27 14:08:49,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-27 14:08:49,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:08:49,680 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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] [2020-10-27 14:08:49,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:08:49,680 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:08:49,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:08:49,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1700702310, now seen corresponding path program 2 times [2020-10-27 14:08:49,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:08:49,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405426432] [2020-10-27 14:08:49,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:08:49,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:49,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:49,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:49,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:49,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:49,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:50,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:54,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:54,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-27 14:08:54,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:08:54,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:08:54,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:54,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:08:54,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-27 14:08:54,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:08:54,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:54,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:54,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:54,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:54,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:54,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:54,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:54,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:08:54,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:54,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:54,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:54,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:54,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:54,885 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2020-10-27 14:08:54,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405426432] [2020-10-27 14:08:54,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:54,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:08:54,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962343302] [2020-10-27 14:08:54,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:08:54,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:54,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:08:54,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:08:54,890 INFO L87 Difference]: Start difference. First operand 161 states and 176 transitions. Second operand 14 states. [2020-10-27 14:08:56,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:08:56,199 INFO L93 Difference]: Finished difference Result 248 states and 275 transitions. [2020-10-27 14:08:56,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:08:56,199 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 97 [2020-10-27 14:08:56,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:08:56,201 INFO L225 Difference]: With dead ends: 248 [2020-10-27 14:08:56,202 INFO L226 Difference]: Without dead ends: 182 [2020-10-27 14:08:56,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:08:56,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-27 14:08:56,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 163. [2020-10-27 14:08:56,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-27 14:08:56,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 177 transitions. [2020-10-27 14:08:56,221 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 177 transitions. Word has length 97 [2020-10-27 14:08:56,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:08:56,221 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 177 transitions. [2020-10-27 14:08:56,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:08:56,221 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 177 transitions. [2020-10-27 14:08:56,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-27 14:08:56,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:08:56,223 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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] [2020-10-27 14:08:56,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:08:56,223 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:08:56,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:08:56,224 INFO L82 PathProgramCache]: Analyzing trace with hash 189538726, now seen corresponding path program 3 times [2020-10-27 14:08:56,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:08:56,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [626240795] [2020-10-27 14:08:56,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:08:56,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:56,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:56,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:56,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:56,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:56,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:56,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:01,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:01,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-27 14:09:01,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:09:01,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-27 14:09:01,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:01,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:09:01,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-27 14:09:01,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 14:09:01,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:01,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:09:01,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:01,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:01,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:01,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:09:01,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:09:01,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:09:01,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:01,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:09:01,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:09:01,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:09:01,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:01,439 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2020-10-27 14:09:01,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [626240795] [2020-10-27 14:09:01,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:09:01,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:09:01,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973873896] [2020-10-27 14:09:01,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:09:01,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:09:01,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:09:01,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:09:01,442 INFO L87 Difference]: Start difference. First operand 163 states and 177 transitions. Second operand 14 states. [2020-10-27 14:09:02,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:09:02,252 INFO L93 Difference]: Finished difference Result 270 states and 291 transitions. [2020-10-27 14:09:02,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:09:02,255 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 97 [2020-10-27 14:09:02,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:09:02,256 INFO L225 Difference]: With dead ends: 270 [2020-10-27 14:09:02,257 INFO L226 Difference]: Without dead ends: 120 [2020-10-27 14:09:02,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:09:02,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-27 14:09:02,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 112. [2020-10-27 14:09:02,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-27 14:09:02,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 120 transitions. [2020-10-27 14:09:02,270 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 120 transitions. Word has length 97 [2020-10-27 14:09:02,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:09:02,270 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 120 transitions. [2020-10-27 14:09:02,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:09:02,270 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 120 transitions. [2020-10-27 14:09:02,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-27 14:09:02,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:09:02,272 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 14:09:02,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 14:09:02,272 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:09:02,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:09:02,273 INFO L82 PathProgramCache]: Analyzing trace with hash 2138587188, now seen corresponding path program 4 times [2020-10-27 14:09:02,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:09:02,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1886551083] [2020-10-27 14:09:02,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:09:02,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:02,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:02,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:04,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:07,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:07,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-27 14:09:07,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:09:07,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 14:09:07,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:07,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:09:07,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:09:07,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 14:09:07,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:07,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:09:07,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:07,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:07,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:07,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:09:07,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:09:07,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:09:07,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:07,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:09:07,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:09:07,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:09:07,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:07,363 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2020-10-27 14:09:07,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1886551083] [2020-10-27 14:09:07,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:09:07,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 14:09:07,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477460471] [2020-10-27 14:09:07,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:09:07,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:09:07,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:09:07,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:09:07,366 INFO L87 Difference]: Start difference. First operand 112 states and 120 transitions. Second operand 5 states. [2020-10-27 14:09:07,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:09:07,511 INFO L93 Difference]: Finished difference Result 216 states and 232 transitions. [2020-10-27 14:09:07,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 14:09:07,512 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 111 [2020-10-27 14:09:07,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:09:07,513 INFO L225 Difference]: With dead ends: 216 [2020-10-27 14:09:07,513 INFO L226 Difference]: Without dead ends: 114 [2020-10-27 14:09:07,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:09:07,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-27 14:09:07,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2020-10-27 14:09:07,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-27 14:09:07,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 122 transitions. [2020-10-27 14:09:07,526 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 122 transitions. Word has length 111 [2020-10-27 14:09:07,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:09:07,526 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 122 transitions. [2020-10-27 14:09:07,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:09:07,526 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 122 transitions. [2020-10-27 14:09:07,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-27 14:09:07,527 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:09:07,528 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:09:07,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 14:09:07,529 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:09:07,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:09:07,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1025848650, now seen corresponding path program 5 times [2020-10-27 14:09:07,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:09:07,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1976745647] [2020-10-27 14:09:07,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:09:07,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:07,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:07,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:07,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:07,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:07,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:07,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:07,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:07,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:07,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:07,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:08,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:08,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:12,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:12,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-27 14:09:12,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 14:09:12,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 14:09:12,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:12,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:09:12,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:09:12,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 14:09:12,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:12,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:09:12,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:12,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:12,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:12,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:09:12,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:09:12,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:09:12,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:12,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:09:12,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:09:12,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:09:12,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:12,712 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-10-27 14:09:12,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1976745647] [2020-10-27 14:09:12,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:09:12,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:09:12,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106712695] [2020-10-27 14:09:12,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:09:12,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:09:12,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:09:12,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:09:12,715 INFO L87 Difference]: Start difference. First operand 114 states and 122 transitions. Second operand 12 states. [2020-10-27 14:09:13,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:09:13,044 INFO L93 Difference]: Finished difference Result 219 states and 235 transitions. [2020-10-27 14:09:13,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 14:09:13,045 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 113 [2020-10-27 14:09:13,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:09:13,046 INFO L225 Difference]: With dead ends: 219 [2020-10-27 14:09:13,047 INFO L226 Difference]: Without dead ends: 117 [2020-10-27 14:09:13,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:09:13,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-27 14:09:13,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2020-10-27 14:09:13,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-27 14:09:13,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 124 transitions. [2020-10-27 14:09:13,060 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 124 transitions. Word has length 113 [2020-10-27 14:09:13,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:09:13,061 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 124 transitions. [2020-10-27 14:09:13,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:09:13,061 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 124 transitions. [2020-10-27 14:09:13,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-27 14:09:13,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:09:13,062 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2020-10-27 14:09:13,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 14:09:13,062 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:09:13,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:09:13,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1211843400, now seen corresponding path program 6 times [2020-10-27 14:09:13,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:09:13,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [941869409] [2020-10-27 14:09:13,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:09:13,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:13,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:13,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:13,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:13,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:13,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:13,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:13,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:13,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:13,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:13,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:14,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:18,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:18,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-27 14:09:18,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 14:09:18,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 14:09:18,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:18,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 14:09:18,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:09:18,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-27 14:09:18,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:18,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:09:18,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:18,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:18,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:18,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:09:18,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:09:18,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:09:18,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:18,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:09:18,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:09:18,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:09:18,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:18,275 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-10-27 14:09:18,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [941869409] [2020-10-27 14:09:18,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:09:18,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:09:18,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60940944] [2020-10-27 14:09:18,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:09:18,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:09:18,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:09:18,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:09:18,278 INFO L87 Difference]: Start difference. First operand 116 states and 124 transitions. Second operand 13 states. [2020-10-27 14:09:18,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:09:18,637 INFO L93 Difference]: Finished difference Result 221 states and 237 transitions. [2020-10-27 14:09:18,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 14:09:18,639 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 115 [2020-10-27 14:09:18,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:09:18,640 INFO L225 Difference]: With dead ends: 221 [2020-10-27 14:09:18,640 INFO L226 Difference]: Without dead ends: 119 [2020-10-27 14:09:18,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:09:18,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-27 14:09:18,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2020-10-27 14:09:18,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-27 14:09:18,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 126 transitions. [2020-10-27 14:09:18,655 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 126 transitions. Word has length 115 [2020-10-27 14:09:18,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:09:18,656 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 126 transitions. [2020-10-27 14:09:18,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:09:18,656 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 126 transitions. [2020-10-27 14:09:18,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-27 14:09:18,657 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:09:18,658 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2020-10-27 14:09:18,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 14:09:18,658 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:09:18,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:09:18,659 INFO L82 PathProgramCache]: Analyzing trace with hash 435828282, now seen corresponding path program 7 times [2020-10-27 14:09:18,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:09:18,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1789421448] [2020-10-27 14:09:18,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:09:18,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:18,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:20,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:20,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:20,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:20,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:20,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:23,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:23,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-27 14:09:23,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:09:23,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 14:09:23,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:23,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 86 [2020-10-27 14:09:23,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:09:23,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-27 14:09:23,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:29,931 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2020-10-27 14:09:34,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:09:34,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:34,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:34,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:34,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:09:34,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:09:34,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:09:34,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:34,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:09:34,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:09:34,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:09:34,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:34,707 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 14:09:34,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1789421448] [2020-10-27 14:09:34,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:09:34,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2020-10-27 14:09:34,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176407075] [2020-10-27 14:09:34,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-10-27 14:09:34,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:09:34,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-10-27 14:09:34,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=5209, Unknown=0, NotChecked=0, Total=5402 [2020-10-27 14:09:34,711 INFO L87 Difference]: Start difference. First operand 118 states and 126 transitions. Second operand 74 states. [2020-10-27 14:09:35,380 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-10-27 14:09:37,369 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 93 [2020-10-27 14:09:38,196 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2020-10-27 14:09:39,272 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-27 14:09:40,790 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-10-27 14:09:41,469 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2020-10-27 14:09:50,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:09:50,167 INFO L93 Difference]: Finished difference Result 218 states and 233 transitions. [2020-10-27 14:09:50,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 14:09:50,168 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 117 [2020-10-27 14:09:50,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:09:50,170 INFO L225 Difference]: With dead ends: 218 [2020-10-27 14:09:50,170 INFO L226 Difference]: Without dead ends: 212 [2020-10-27 14:09:50,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 7 SyntacticMatches, 10 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2237 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=448, Invalid=10894, Unknown=0, NotChecked=0, Total=11342 [2020-10-27 14:09:50,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-27 14:09:50,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 195. [2020-10-27 14:09:50,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-10-27 14:09:50,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 210 transitions. [2020-10-27 14:09:50,195 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 210 transitions. Word has length 117 [2020-10-27 14:09:50,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:09:50,196 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 210 transitions. [2020-10-27 14:09:50,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-10-27 14:09:50,196 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 210 transitions. [2020-10-27 14:09:50,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-27 14:09:50,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:09:50,198 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2020-10-27 14:09:50,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 14:09:50,198 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:09:50,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:09:50,199 INFO L82 PathProgramCache]: Analyzing trace with hash 745574396, now seen corresponding path program 8 times [2020-10-27 14:09:50,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:09:50,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975963954] [2020-10-27 14:09:50,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:09:50,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:50,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:50,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:50,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:50,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:50,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:52,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:55,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:55,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-27 14:09:55,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:09:55,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 14:09:55,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:55,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:09:55,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-27 14:09:55,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 14:09:55,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:55,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:09:55,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:55,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:55,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:55,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:09:55,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:09:55,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:09:55,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:55,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:09:55,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:09:55,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:09:55,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:55,551 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2020-10-27 14:09:55,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975963954] [2020-10-27 14:09:55,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:09:55,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:09:55,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202894681] [2020-10-27 14:09:55,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:09:55,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:09:55,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:09:55,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:09:55,560 INFO L87 Difference]: Start difference. First operand 195 states and 210 transitions. Second operand 16 states. [2020-10-27 14:09:57,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:09:57,409 INFO L93 Difference]: Finished difference Result 296 states and 323 transitions. [2020-10-27 14:09:57,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 14:09:57,410 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 119 [2020-10-27 14:09:57,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:09:57,412 INFO L225 Difference]: With dead ends: 296 [2020-10-27 14:09:57,412 INFO L226 Difference]: Without dead ends: 218 [2020-10-27 14:09:57,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:09:57,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-27 14:09:57,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 195. [2020-10-27 14:09:57,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-10-27 14:09:57,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 209 transitions. [2020-10-27 14:09:57,434 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 209 transitions. Word has length 119 [2020-10-27 14:09:57,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:09:57,435 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 209 transitions. [2020-10-27 14:09:57,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:09:57,435 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 209 transitions. [2020-10-27 14:09:57,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-27 14:09:57,436 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:09:57,436 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2020-10-27 14:09:57,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 14:09:57,437 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:09:57,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:09:57,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1643505348, now seen corresponding path program 9 times [2020-10-27 14:09:57,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:09:57,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2130762103] [2020-10-27 14:09:57,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:09:57,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:57,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:57,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:57,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:57,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:57,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:58,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:02,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:02,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-27 14:10:02,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:10:02,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:10:02,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:02,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:10:02,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:10:02,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 14:10:02,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:02,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:10:02,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:02,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:02,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:02,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:10:02,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:10:02,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:10:02,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:02,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:10:02,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:10:02,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:10:02,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:02,671 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2020-10-27 14:10:02,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2130762103] [2020-10-27 14:10:02,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:10:02,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:10:02,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67015054] [2020-10-27 14:10:02,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:10:02,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:10:02,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:10:02,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:10:02,673 INFO L87 Difference]: Start difference. First operand 195 states and 209 transitions. Second operand 14 states. [2020-10-27 14:10:03,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:10:03,246 INFO L93 Difference]: Finished difference Result 377 states and 405 transitions. [2020-10-27 14:10:03,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 14:10:03,248 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 119 [2020-10-27 14:10:03,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:10:03,250 INFO L225 Difference]: With dead ends: 377 [2020-10-27 14:10:03,250 INFO L226 Difference]: Without dead ends: 198 [2020-10-27 14:10:03,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:10:03,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-27 14:10:03,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 197. [2020-10-27 14:10:03,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-27 14:10:03,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 211 transitions. [2020-10-27 14:10:03,283 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 211 transitions. Word has length 119 [2020-10-27 14:10:03,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:10:03,284 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 211 transitions. [2020-10-27 14:10:03,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:10:03,284 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 211 transitions. [2020-10-27 14:10:03,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-27 14:10:03,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:10:03,287 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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] [2020-10-27 14:10:03,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 14:10:03,287 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:10:03,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:10:03,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1912405570, now seen corresponding path program 10 times [2020-10-27 14:10:03,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:10:03,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1711251590] [2020-10-27 14:10:03,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:10:03,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:03,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:03,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:03,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:03,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:03,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:05,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:08,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:08,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-27 14:10:08,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:10:08,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 14:10:08,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:08,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:10:08,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 72 [2020-10-27 14:10:08,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 14:10:08,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:08,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:10:08,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:08,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:08,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:08,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:10:08,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:10:08,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:10:08,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:08,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:10:08,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:10:08,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:10:08,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:08,603 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-10-27 14:10:08,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1711251590] [2020-10-27 14:10:08,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:10:08,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:10:08,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775738150] [2020-10-27 14:10:08,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:10:08,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:10:08,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:10:08,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:10:08,605 INFO L87 Difference]: Start difference. First operand 197 states and 211 transitions. Second operand 16 states. [2020-10-27 14:10:09,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:10:09,938 INFO L93 Difference]: Finished difference Result 320 states and 341 transitions. [2020-10-27 14:10:09,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 14:10:09,939 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 121 [2020-10-27 14:10:09,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:10:09,941 INFO L225 Difference]: With dead ends: 320 [2020-10-27 14:10:09,941 INFO L226 Difference]: Without dead ends: 144 [2020-10-27 14:10:09,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:10:09,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-27 14:10:09,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 136. [2020-10-27 14:10:09,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-27 14:10:09,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 144 transitions. [2020-10-27 14:10:09,958 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 144 transitions. Word has length 121 [2020-10-27 14:10:09,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:10:09,958 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 144 transitions. [2020-10-27 14:10:09,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:10:09,958 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 144 transitions. [2020-10-27 14:10:09,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-27 14:10:09,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:10:09,960 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2020-10-27 14:10:09,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 14:10:09,961 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:10:09,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:10:09,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1319261772, now seen corresponding path program 11 times [2020-10-27 14:10:09,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:10:09,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [933904695] [2020-10-27 14:10:09,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:10:09,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:10,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:10,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:10,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:10,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:10,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:12,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:15,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:15,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-27 14:10:15,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:10:15,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:10:15,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:15,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:10:15,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:10:15,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 14:10:15,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:15,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:10:15,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:15,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:15,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:15,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:10:15,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:10:15,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:10:15,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:15,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:10:15,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:10:15,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:10:15,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:15,319 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2020-10-27 14:10:15,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [933904695] [2020-10-27 14:10:15,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:10:15,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:10:15,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945229987] [2020-10-27 14:10:15,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:10:15,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:10:15,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:10:15,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:10:15,321 INFO L87 Difference]: Start difference. First operand 136 states and 144 transitions. Second operand 16 states. [2020-10-27 14:10:15,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:10:15,966 INFO L93 Difference]: Finished difference Result 257 states and 273 transitions. [2020-10-27 14:10:15,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:10:15,967 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 135 [2020-10-27 14:10:15,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:10:15,968 INFO L225 Difference]: With dead ends: 257 [2020-10-27 14:10:15,969 INFO L226 Difference]: Without dead ends: 139 [2020-10-27 14:10:15,970 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:10:15,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-27 14:10:15,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2020-10-27 14:10:15,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-27 14:10:15,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 146 transitions. [2020-10-27 14:10:15,987 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 146 transitions. Word has length 135 [2020-10-27 14:10:15,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:10:15,988 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 146 transitions. [2020-10-27 14:10:15,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:10:15,988 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 146 transitions. [2020-10-27 14:10:15,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-27 14:10:15,989 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:10:15,990 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:10:15,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 14:10:15,990 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:10:15,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:10:15,991 INFO L82 PathProgramCache]: Analyzing trace with hash 906885838, now seen corresponding path program 12 times [2020-10-27 14:10:15,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:10:15,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [877553273] [2020-10-27 14:10:15,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:10:16,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:16,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:19,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:23,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:23,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-27 14:10:23,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:10:23,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6803 [2020-10-27 14:10:23,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:23,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 102 [2020-10-27 14:10:23,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:10:23,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 131 [2020-10-27 14:10:23,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:34,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:10:34,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:34,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:34,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:34,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:10:34,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:10:34,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:10:34,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:34,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:10:34,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:10:34,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:10:34,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:34,794 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-27 14:10:34,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [877553273] [2020-10-27 14:10:34,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:10:34,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-27 14:10:34,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107879009] [2020-10-27 14:10:34,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-27 14:10:34,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:10:34,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-27 14:10:34,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=3504, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 14:10:34,798 INFO L87 Difference]: Start difference. First operand 138 states and 146 transitions. Second operand 61 states. [2020-10-27 14:10:35,629 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-10-27 14:10:36,113 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2020-10-27 14:10:36,532 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2020-10-27 14:10:36,901 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2020-10-27 14:10:37,264 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2020-10-27 14:10:38,156 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-10-27 14:10:39,016 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-10-27 14:10:39,547 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2020-10-27 14:10:40,098 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-10-27 14:10:40,611 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2020-10-27 14:10:41,071 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2020-10-27 14:10:41,705 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2020-10-27 14:10:51,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:10:51,252 INFO L93 Difference]: Finished difference Result 252 states and 267 transitions. [2020-10-27 14:10:51,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 14:10:51,257 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 137 [2020-10-27 14:10:51,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:10:51,258 INFO L225 Difference]: With dead ends: 252 [2020-10-27 14:10:51,258 INFO L226 Difference]: Without dead ends: 246 [2020-10-27 14:10:51,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 9 SyntacticMatches, 37 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1386 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=310, Invalid=6662, Unknown=0, NotChecked=0, Total=6972 [2020-10-27 14:10:51,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-27 14:10:51,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 227. [2020-10-27 14:10:51,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-27 14:10:51,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 242 transitions. [2020-10-27 14:10:51,293 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 242 transitions. Word has length 137 [2020-10-27 14:10:51,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:10:51,293 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 242 transitions. [2020-10-27 14:10:51,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-27 14:10:51,293 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 242 transitions. [2020-10-27 14:10:51,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-27 14:10:51,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:10:51,295 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:10:51,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 14:10:51,295 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:10:51,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:10:51,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1226665872, now seen corresponding path program 13 times [2020-10-27 14:10:51,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:10:51,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1861772275] [2020-10-27 14:10:51,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:10:51,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:51,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:51,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:51,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:51,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:51,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:56,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:56,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-27 14:10:56,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:10:56,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 14:10:56,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:56,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:10:56,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-27 14:10:56,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 14:10:56,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:56,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:10:56,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:56,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:56,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:56,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:10:56,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:10:56,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:10:56,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:56,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:10:56,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:10:56,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:10:56,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:56,848 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2020-10-27 14:10:56,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1861772275] [2020-10-27 14:10:56,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:10:56,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:10:56,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17003059] [2020-10-27 14:10:56,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:10:56,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:10:56,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:10:56,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:10:56,850 INFO L87 Difference]: Start difference. First operand 227 states and 242 transitions. Second operand 18 states. [2020-10-27 14:11:01,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:11:01,003 INFO L93 Difference]: Finished difference Result 342 states and 369 transitions. [2020-10-27 14:11:01,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 14:11:01,005 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 139 [2020-10-27 14:11:01,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:11:01,007 INFO L225 Difference]: With dead ends: 342 [2020-10-27 14:11:01,007 INFO L226 Difference]: Without dead ends: 252 [2020-10-27 14:11:01,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=248, Invalid=808, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:11:01,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-27 14:11:01,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 225. [2020-10-27 14:11:01,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2020-10-27 14:11:01,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 239 transitions. [2020-10-27 14:11:01,038 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 239 transitions. Word has length 139 [2020-10-27 14:11:01,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:11:01,038 INFO L481 AbstractCegarLoop]: Abstraction has 225 states and 239 transitions. [2020-10-27 14:11:01,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:11:01,038 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 239 transitions. [2020-10-27 14:11:01,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-27 14:11:01,040 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:11:01,040 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:11:01,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 14:11:01,040 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:11:01,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:11:01,041 INFO L82 PathProgramCache]: Analyzing trace with hash 71239888, now seen corresponding path program 14 times [2020-10-27 14:11:01,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:11:01,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010480167] [2020-10-27 14:11:01,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:11:01,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:01,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:01,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:01,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:01,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:01,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:04,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:06,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:06,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-27 14:11:06,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:11:06,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-27 14:11:06,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:06,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:11:06,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 82 [2020-10-27 14:11:06,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 14:11:06,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:11:06,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:11:06,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:06,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:06,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:06,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:11:06,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:11:06,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 14:11:06,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:06,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:11:06,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:11:06,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:11:06,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:11:06,619 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2020-10-27 14:11:06,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010480167] [2020-10-27 14:11:06,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:11:06,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:11:06,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851809055] [2020-10-27 14:11:06,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:11:06,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:11:06,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:11:06,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:11:06,622 INFO L87 Difference]: Start difference. First operand 225 states and 239 transitions. Second operand 18 states.