/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 -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf -i ../../../trunk/examples/svcomp/loop-invgen/apache-get-tag.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-22 02:22:23,132 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 02:22:23,137 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 02:22:23,197 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-22 02:22:23,197 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-22 02:22:23,202 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-22 02:22:23,206 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-22 02:22:23,214 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-22 02:22:23,217 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-22 02:22:23,223 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-22 02:22:23,225 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-22 02:22:23,227 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-22 02:22:23,227 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-22 02:22:23,230 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-22 02:22:23,232 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-22 02:22:23,234 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-22 02:22:23,237 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-22 02:22:23,239 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-22 02:22:23,246 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-22 02:22:23,254 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-22 02:22:23,256 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-22 02:22:23,258 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-22 02:22:23,259 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-22 02:22:23,276 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-22 02:22:23,286 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-22 02:22:23,286 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-22 02:22:23,286 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-22 02:22:23,289 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-22 02:22:23,290 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-22 02:22:23,291 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-22 02:22:23,291 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-22 02:22:23,292 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-22 02:22:23,294 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-22 02:22:23,295 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-22 02:22:23,296 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-22 02:22:23,296 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-22 02:22:23,297 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-22 02:22:23,297 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-22 02:22:23,297 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-22 02:22:23,298 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-22 02:22:23,299 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-22 02:22:23,300 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-22 02:22:23,325 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 02:22:23,326 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 02:22:23,331 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 02:22:23,332 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 02:22:23,332 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 02:22:23,332 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 02:22:23,332 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 02:22:23,332 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 02:22:23,333 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 02:22:23,333 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 02:22:23,334 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 02:22:23,335 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 02:22:23,335 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 02:22:23,335 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 02:22:23,336 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 02:22:23,336 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 02:22:23,336 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 02:22:23,336 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 02:22:23,337 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 02:22:23,337 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 02:22:23,337 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 02:22:23,337 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 02:22:23,337 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 02:22:23,338 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 02:22:23,760 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 02:22:23,788 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 02:22:23,791 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 02:22:23,793 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 02:22:23,794 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 02:22:23,795 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/apache-get-tag.i [2021-02-22 02:22:23,869 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/780df3971/7cac2c6588d94209bc41069b3eb70168/FLAG8712124d2 [2021-02-22 02:22:24,439 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 02:22:24,440 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/apache-get-tag.i [2021-02-22 02:22:24,448 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/780df3971/7cac2c6588d94209bc41069b3eb70168/FLAG8712124d2 [2021-02-22 02:22:24,794 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/780df3971/7cac2c6588d94209bc41069b3eb70168 [2021-02-22 02:22:24,797 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 02:22:24,813 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 02:22:24,818 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 02:22:24,819 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 02:22:24,823 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 02:22:24,824 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:22:24" (1/1) ... [2021-02-22 02:22:24,826 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bb23ed6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:22:24, skipping insertion in model container [2021-02-22 02:22:24,826 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:22:24" (1/1) ... [2021-02-22 02:22:24,838 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 02:22:24,867 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 02:22:25,069 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/apache-get-tag.i[893,906] [2021-02-22 02:22:25,088 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:22:25,098 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 02:22:25,113 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/apache-get-tag.i[893,906] [2021-02-22 02:22:25,122 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:22:25,146 INFO L208 MainTranslator]: Completed translation [2021-02-22 02:22:25,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:22:25 WrapperNode [2021-02-22 02:22:25,148 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 02:22:25,149 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 02:22:25,149 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 02:22:25,150 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 02:22:25,164 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:22:25" (1/1) ... [2021-02-22 02:22:25,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:22:25" (1/1) ... [2021-02-22 02:22:25,173 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:22:25" (1/1) ... [2021-02-22 02:22:25,173 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:22:25" (1/1) ... [2021-02-22 02:22:25,181 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:22:25" (1/1) ... [2021-02-22 02:22:25,187 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:22:25" (1/1) ... [2021-02-22 02:22:25,189 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:22:25" (1/1) ... [2021-02-22 02:22:25,192 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 02:22:25,193 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 02:22:25,193 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 02:22:25,193 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 02:22:25,194 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:22:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2021-02-22 02:22:25,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 02:22:25,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 02:22:25,314 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 02:22:25,314 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-22 02:22:25,314 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-22 02:22:25,314 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 02:22:25,315 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 02:22:25,315 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 02:22:25,315 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-22 02:22:25,315 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-22 02:22:25,315 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 02:22:25,316 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 02:22:25,316 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-22 02:22:25,316 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-22 02:22:25,316 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-22 02:22:25,316 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 02:22:25,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 02:22:25,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 02:22:25,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 02:22:25,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 02:22:25,317 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 02:22:25,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 02:22:25,754 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 02:22:25,754 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-02-22 02:22:25,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:22:25 BoogieIcfgContainer [2021-02-22 02:22:25,758 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 02:22:25,761 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 02:22:25,761 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 02:22:25,765 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 02:22:25,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 02:22:24" (1/3) ... [2021-02-22 02:22:25,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25432e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:22:25, skipping insertion in model container [2021-02-22 02:22:25,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:22:25" (2/3) ... [2021-02-22 02:22:25,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25432e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:22:25, skipping insertion in model container [2021-02-22 02:22:25,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:22:25" (3/3) ... [2021-02-22 02:22:25,773 INFO L111 eAbstractionObserver]: Analyzing ICFG apache-get-tag.i [2021-02-22 02:22:25,786 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 02:22:25,791 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 02:22:25,812 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 02:22:25,853 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 02:22:25,854 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 02:22:25,854 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 02:22:25,854 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 02:22:25,854 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 02:22:25,854 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 02:22:25,855 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 02:22:25,855 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 02:22:25,882 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states. [2021-02-22 02:22:25,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-22 02:22:25,896 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:22:25,897 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] [2021-02-22 02:22:25,897 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:22:25,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:22:25,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1183090698, now seen corresponding path program 1 times [2021-02-22 02:22:25,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:22:25,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1592929838] [2021-02-22 02:22:25,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:22:26,027 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:22:26,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:22:26,219 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:26,221 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:26,222 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:26,222 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:26,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:22:26,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:22:26,270 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:26,271 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:26,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:22:26,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1592929838] [2021-02-22 02:22:26,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:22:26,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-22 02:22:26,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927498393] [2021-02-22 02:22:26,287 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-22 02:22:26,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:22:26,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-22 02:22:26,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-22 02:22:26,305 INFO L87 Difference]: Start difference. First operand 82 states. Second operand 3 states. [2021-02-22 02:22:26,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:22:26,532 INFO L93 Difference]: Finished difference Result 142 states and 211 transitions. [2021-02-22 02:22:26,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-22 02:22:26,535 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2021-02-22 02:22:26,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:22:26,545 INFO L225 Difference]: With dead ends: 142 [2021-02-22 02:22:26,546 INFO L226 Difference]: Without dead ends: 76 [2021-02-22 02:22:26,552 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 [2021-02-22 02:22:26,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-02-22 02:22:26,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-02-22 02:22:26,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-02-22 02:22:26,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 94 transitions. [2021-02-22 02:22:26,625 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 94 transitions. Word has length 26 [2021-02-22 02:22:26,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:22:26,626 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 94 transitions. [2021-02-22 02:22:26,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-22 02:22:26,626 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 94 transitions. [2021-02-22 02:22:26,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-22 02:22:26,627 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:22:26,627 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] [2021-02-22 02:22:26,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 02:22:26,628 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:22:26,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:22:26,629 INFO L82 PathProgramCache]: Analyzing trace with hash -2035797628, now seen corresponding path program 1 times [2021-02-22 02:22:26,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:22:26,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [642689405] [2021-02-22 02:22:26,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:22:26,634 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:22:26,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:22:26,723 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:26,724 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:26,740 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-22 02:22:26,740 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-22 02:22:26,745 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:26,745 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:22:26,751 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:26,752 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:22:26,759 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:26,760 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:26,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:22:26,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:22:26,836 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:26,837 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:26,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:22:26,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [642689405] [2021-02-22 02:22:26,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:22:26,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-22 02:22:26,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373413257] [2021-02-22 02:22:26,848 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-22 02:22:26,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:22:26,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-22 02:22:26,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-22 02:22:26,849 INFO L87 Difference]: Start difference. First operand 76 states and 94 transitions. Second operand 6 states. [2021-02-22 02:22:27,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:22:27,394 INFO L93 Difference]: Finished difference Result 98 states and 122 transitions. [2021-02-22 02:22:27,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-22 02:22:27,395 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2021-02-22 02:22:27,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:22:27,398 INFO L225 Difference]: With dead ends: 98 [2021-02-22 02:22:27,398 INFO L226 Difference]: Without dead ends: 96 [2021-02-22 02:22:27,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-02-22 02:22:27,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-02-22 02:22:27,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 89. [2021-02-22 02:22:27,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2021-02-22 02:22:27,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 111 transitions. [2021-02-22 02:22:27,431 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 111 transitions. Word has length 27 [2021-02-22 02:22:27,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:22:27,431 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 111 transitions. [2021-02-22 02:22:27,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-22 02:22:27,432 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 111 transitions. [2021-02-22 02:22:27,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-22 02:22:27,433 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:22:27,433 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 02:22:27,434 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-22 02:22:27,434 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:22:27,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:22:27,435 INFO L82 PathProgramCache]: Analyzing trace with hash 836322033, now seen corresponding path program 1 times [2021-02-22 02:22:27,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:22:27,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2047615859] [2021-02-22 02:22:27,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:22:27,438 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:22:27,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:22:27,487 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:27,487 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:27,488 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:27,489 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:22:27,495 WARN L141 QuantifierPusher]: treesize reduction 9, result has 69.0 percent of original size [2021-02-22 02:22:27,496 WARN L147 QuantifierPusher]: treesize reduction 9, result has 69.0 percent of original size 20 [2021-02-22 02:22:27,534 WARN L141 QuantifierPusher]: treesize reduction 4, result has 73.3 percent of original size [2021-02-22 02:22:27,535 WARN L147 QuantifierPusher]: treesize reduction 4, result has 73.3 percent of original size 11 [2021-02-22 02:22:27,546 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:27,547 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:22:27,553 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:27,553 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:22:27,560 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:27,561 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:27,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:22:27,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:22:27,593 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:27,593 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:27,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-02-22 02:22:27,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:22:27,600 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:27,601 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:27,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:22:27,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2047615859] [2021-02-22 02:22:27,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:22:27,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-22 02:22:27,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382896939] [2021-02-22 02:22:27,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-22 02:22:27,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:22:27,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-22 02:22:27,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-22 02:22:27,607 INFO L87 Difference]: Start difference. First operand 89 states and 111 transitions. Second operand 8 states. [2021-02-22 02:22:28,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:22:28,131 INFO L93 Difference]: Finished difference Result 102 states and 125 transitions. [2021-02-22 02:22:28,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-22 02:22:28,132 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2021-02-22 02:22:28,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:22:28,134 INFO L225 Difference]: With dead ends: 102 [2021-02-22 02:22:28,134 INFO L226 Difference]: Without dead ends: 91 [2021-02-22 02:22:28,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-02-22 02:22:28,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-02-22 02:22:28,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 85. [2021-02-22 02:22:28,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-02-22 02:22:28,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 102 transitions. [2021-02-22 02:22:28,155 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 102 transitions. Word has length 32 [2021-02-22 02:22:28,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:22:28,156 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 102 transitions. [2021-02-22 02:22:28,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-22 02:22:28,156 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 102 transitions. [2021-02-22 02:22:28,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-22 02:22:28,157 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:22:28,158 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 02:22:28,158 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-22 02:22:28,158 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:22:28,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:22:28,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1034410599, now seen corresponding path program 1 times [2021-02-22 02:22:28,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:22:28,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1910452287] [2021-02-22 02:22:28,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:22:28,162 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:22:28,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:22:28,211 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:28,212 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:28,213 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:28,213 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:22:28,218 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:28,218 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:22:28,226 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:28,227 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:22:28,235 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:28,236 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:22:28,241 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:28,242 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:22:28,249 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:28,250 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:28,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:22:28,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:22:28,280 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:28,280 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:28,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-02-22 02:22:28,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:22:28,287 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:28,287 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:28,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:22:28,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1910452287] [2021-02-22 02:22:28,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:22:28,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-22 02:22:28,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569215770] [2021-02-22 02:22:28,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-22 02:22:28,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:22:28,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-22 02:22:28,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-22 02:22:28,293 INFO L87 Difference]: Start difference. First operand 85 states and 102 transitions. Second operand 8 states. [2021-02-22 02:22:28,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:22:28,825 INFO L93 Difference]: Finished difference Result 97 states and 115 transitions. [2021-02-22 02:22:28,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-22 02:22:28,826 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2021-02-22 02:22:28,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:22:28,829 INFO L225 Difference]: With dead ends: 97 [2021-02-22 02:22:28,829 INFO L226 Difference]: Without dead ends: 95 [2021-02-22 02:22:28,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-02-22 02:22:28,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-02-22 02:22:28,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2021-02-22 02:22:28,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2021-02-22 02:22:28,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 109 transitions. [2021-02-22 02:22:28,877 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 109 transitions. Word has length 35 [2021-02-22 02:22:28,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:22:28,878 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 109 transitions. [2021-02-22 02:22:28,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-22 02:22:28,878 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 109 transitions. [2021-02-22 02:22:28,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-02-22 02:22:28,884 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:22:28,885 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 02:22:28,889 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-22 02:22:28,890 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:22:28,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:22:28,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1264498093, now seen corresponding path program 1 times [2021-02-22 02:22:28,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:22:28,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [516991859] [2021-02-22 02:22:28,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:22:28,908 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:22:28,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:22:28,986 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:28,986 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:28,987 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:28,988 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:22:28,992 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:28,993 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:22:28,999 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:29,000 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:22:29,005 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:29,006 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:22:29,013 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:29,013 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:22:29,021 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:29,022 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:29,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:22:29,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:22:29,062 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:29,062 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:29,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-02-22 02:22:29,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:22:29,068 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:29,068 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:29,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-02-22 02:22:29,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:22:29,073 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:29,074 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:29,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:22:29,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [516991859] [2021-02-22 02:22:29,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:22:29,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-22 02:22:29,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501337344] [2021-02-22 02:22:29,079 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-22 02:22:29,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:22:29,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-22 02:22:29,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-02-22 02:22:29,080 INFO L87 Difference]: Start difference. First operand 91 states and 109 transitions. Second operand 8 states. [2021-02-22 02:22:29,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:22:29,721 INFO L93 Difference]: Finished difference Result 127 states and 153 transitions. [2021-02-22 02:22:29,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-22 02:22:29,722 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2021-02-22 02:22:29,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:22:29,724 INFO L225 Difference]: With dead ends: 127 [2021-02-22 02:22:29,724 INFO L226 Difference]: Without dead ends: 124 [2021-02-22 02:22:29,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-02-22 02:22:29,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-02-22 02:22:29,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 115. [2021-02-22 02:22:29,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2021-02-22 02:22:29,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 138 transitions. [2021-02-22 02:22:29,748 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 138 transitions. Word has length 45 [2021-02-22 02:22:29,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:22:29,749 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 138 transitions. [2021-02-22 02:22:29,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-22 02:22:29,749 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 138 transitions. [2021-02-22 02:22:29,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-02-22 02:22:29,750 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:22:29,750 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 02:22:29,751 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-22 02:22:29,751 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:22:29,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:22:29,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1741298737, now seen corresponding path program 1 times [2021-02-22 02:22:29,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:22:29,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1017527326] [2021-02-22 02:22:29,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:22:29,785 WARN L141 QuantifierPusher]: treesize reduction 26, result has 3.7 percent of original size [2021-02-22 02:22:29,786 WARN L147 QuantifierPusher]: treesize reduction 26, result has 3.7 percent of original size 1 [2021-02-22 02:22:29,792 WARN L141 QuantifierPusher]: treesize reduction 26, result has 3.7 percent of original size [2021-02-22 02:22:29,793 WARN L147 QuantifierPusher]: treesize reduction 26, result has 3.7 percent of original size 1 [2021-02-22 02:22:29,799 WARN L141 QuantifierPusher]: treesize reduction 2, result has 80.0 percent of original size [2021-02-22 02:22:29,832 WARN L147 QuantifierPusher]: treesize reduction 2, result has 80.0 percent of original size 8 [2021-02-22 02:22:29,837 WARN L141 QuantifierPusher]: treesize reduction 8, result has 75.0 percent of original size [2021-02-22 02:22:29,841 WARN L147 QuantifierPusher]: treesize reduction 8, result has 75.0 percent of original size 24 [2021-02-22 02:22:29,848 WARN L141 QuantifierPusher]: treesize reduction 11, result has 59.3 percent of original size [2021-02-22 02:22:29,851 WARN L147 QuantifierPusher]: treesize reduction 11, result has 59.3 percent of original size 16 [2021-02-22 02:22:29,854 WARN L141 QuantifierPusher]: treesize reduction 11, result has 59.3 percent of original size [2021-02-22 02:22:29,856 WARN L147 QuantifierPusher]: treesize reduction 11, result has 59.3 percent of original size 16 [2021-02-22 02:22:29,865 WARN L141 QuantifierPusher]: treesize reduction 6, result has 78.6 percent of original size [2021-02-22 02:22:29,870 INFO L723 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2021-02-22 02:22:29,879 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:29,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:22:29,883 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:29,889 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-02-22 02:22:29,892 WARN L147 QuantifierPusher]: treesize reduction 6, result has 78.6 percent of original size 22 [2021-02-22 02:22:29,896 WARN L141 QuantifierPusher]: treesize reduction 8, result has 84.6 percent of original size [2021-02-22 02:22:29,899 WARN L147 QuantifierPusher]: treesize reduction 8, result has 84.6 percent of original size 44 [2021-02-22 02:22:29,900 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-22 02:22:29,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:22:29,928 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:29,929 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:29,930 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:29,930 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:22:29,933 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:29,934 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:22:29,938 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:29,939 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:22:29,939 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:29,940 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:22:29,945 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:29,945 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:22:29,953 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:29,954 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:29,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:22:29,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:22:29,996 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:29,997 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:29,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:22:30,002 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:30,005 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-02-22 02:22:30,010 WARN L141 QuantifierPusher]: treesize reduction 7, result has 82.9 percent of original size [2021-02-22 02:22:30,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:22:30,015 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:30,018 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-02-22 02:22:30,020 WARN L147 QuantifierPusher]: treesize reduction 7, result has 82.9 percent of original size 34 [2021-02-22 02:22:30,057 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:30,058 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:22:30,059 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:30,060 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-22 02:22:30,072 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:30,078 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-22 02:22:30,098 WARN L141 QuantifierPusher]: treesize reduction 8, result has 57.9 percent of original size [2021-02-22 02:22:30,100 WARN L147 QuantifierPusher]: treesize reduction 8, result has 57.9 percent of original size 11 [2021-02-22 02:22:30,117 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:30,123 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-22 02:22:30,130 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:30,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:22:30,138 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:30,142 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:22:30,144 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-22 02:22:30,162 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:30,163 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-22 02:22:30,182 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:30,183 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-22 02:22:30,201 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:30,202 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-22 02:22:30,214 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:30,216 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-22 02:22:30,218 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:30,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:22:30,219 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:30,220 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:22:30,222 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-02-22 02:22:30,229 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:30,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:22:30,232 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:30,232 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-22 02:22:30,233 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:22:30,255 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:30,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:22:30,258 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:30,258 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-22 02:22:30,259 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:22:30,284 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:30,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:22:30,288 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:30,289 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-22 02:22:30,290 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-22 02:22:30,316 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:30,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:22:30,321 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:30,322 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-22 02:22:30,323 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-22 02:22:30,356 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:30,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:22:30,358 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:30,359 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-22 02:22:30,359 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-22 02:22:30,361 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:30,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:22:30,367 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:30,367 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-02-22 02:22:30,368 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-02-22 02:22:30,402 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:30,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:22:30,405 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:30,405 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-02-22 02:22:30,406 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-22 02:22:30,438 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:30,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:22:30,443 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:30,444 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-02-22 02:22:30,445 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-02-22 02:22:30,478 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:30,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:22:30,484 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:30,485 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-02-22 02:22:30,486 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-02-22 02:22:30,524 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:30,524 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:30,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1017527326] [2021-02-22 02:22:30,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:22:30,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-02-22 02:22:30,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899215737] [2021-02-22 02:22:30,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-22 02:22:30,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:22:30,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-22 02:22:30,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-02-22 02:22:30,527 INFO L87 Difference]: Start difference. First operand 115 states and 138 transitions. Second operand 19 states. [2021-02-22 02:22:32,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:22:32,364 INFO L93 Difference]: Finished difference Result 136 states and 164 transitions. [2021-02-22 02:22:32,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-22 02:22:32,365 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 45 [2021-02-22 02:22:32,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:22:32,369 INFO L225 Difference]: With dead ends: 136 [2021-02-22 02:22:32,369 INFO L226 Difference]: Without dead ends: 133 [2021-02-22 02:22:32,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=245, Invalid=1237, Unknown=0, NotChecked=0, Total=1482 [2021-02-22 02:22:32,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-02-22 02:22:32,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-02-22 02:22:32,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2021-02-22 02:22:32,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 159 transitions. [2021-02-22 02:22:32,434 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 159 transitions. Word has length 45 [2021-02-22 02:22:32,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:22:32,434 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 159 transitions. [2021-02-22 02:22:32,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-02-22 02:22:32,435 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 159 transitions. [2021-02-22 02:22:32,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-02-22 02:22:32,442 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:22:32,443 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 02:22:32,443 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-22 02:22:32,443 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:22:32,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:22:32,449 INFO L82 PathProgramCache]: Analyzing trace with hash -569512649, now seen corresponding path program 1 times [2021-02-22 02:22:32,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:22:32,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1041890429] [2021-02-22 02:22:32,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:22:32,454 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:22:32,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:22:32,511 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:32,511 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:32,512 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:32,512 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:22:32,516 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:32,516 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:22:32,528 WARN L141 QuantifierPusher]: treesize reduction 9, result has 71.0 percent of original size [2021-02-22 02:22:32,529 WARN L147 QuantifierPusher]: treesize reduction 9, result has 71.0 percent of original size 22 [2021-02-22 02:22:32,557 WARN L141 QuantifierPusher]: treesize reduction 5, result has 72.2 percent of original size [2021-02-22 02:22:32,557 WARN L147 QuantifierPusher]: treesize reduction 5, result has 72.2 percent of original size 13 [2021-02-22 02:22:32,562 WARN L141 QuantifierPusher]: treesize reduction 5, result has 72.2 percent of original size [2021-02-22 02:22:32,563 WARN L147 QuantifierPusher]: treesize reduction 5, result has 72.2 percent of original size 13 [2021-02-22 02:22:32,575 WARN L141 QuantifierPusher]: treesize reduction 10, result has 63.0 percent of original size [2021-02-22 02:22:32,576 WARN L147 QuantifierPusher]: treesize reduction 10, result has 63.0 percent of original size 17 [2021-02-22 02:22:32,597 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:32,597 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:22:32,604 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:32,605 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:22:32,613 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:32,614 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:32,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:22:32,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:22:32,653 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:32,654 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:32,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-02-22 02:22:32,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:22:32,659 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:32,660 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:32,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-02-22 02:22:32,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:22:32,665 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:32,666 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:32,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-02-22 02:22:32,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:22:32,671 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:32,671 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:32,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:22:32,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1041890429] [2021-02-22 02:22:32,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:22:32,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-22 02:22:32,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559165675] [2021-02-22 02:22:32,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-22 02:22:32,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:22:32,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-22 02:22:32,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-02-22 02:22:32,682 INFO L87 Difference]: Start difference. First operand 133 states and 159 transitions. Second operand 10 states. [2021-02-22 02:22:33,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:22:33,480 INFO L93 Difference]: Finished difference Result 146 states and 173 transitions. [2021-02-22 02:22:33,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-22 02:22:33,480 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 56 [2021-02-22 02:22:33,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:22:33,482 INFO L225 Difference]: With dead ends: 146 [2021-02-22 02:22:33,482 INFO L226 Difference]: Without dead ends: 141 [2021-02-22 02:22:33,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-02-22 02:22:33,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-02-22 02:22:33,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 137. [2021-02-22 02:22:33,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2021-02-22 02:22:33,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 162 transitions. [2021-02-22 02:22:33,530 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 162 transitions. Word has length 56 [2021-02-22 02:22:33,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:22:33,530 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 162 transitions. [2021-02-22 02:22:33,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-22 02:22:33,530 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 162 transitions. [2021-02-22 02:22:33,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-02-22 02:22:33,532 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:22:33,532 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 02:22:33,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-22 02:22:33,533 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:22:33,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:22:33,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1069428506, now seen corresponding path program 1 times [2021-02-22 02:22:33,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:22:33,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [743083844] [2021-02-22 02:22:33,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:22:33,546 WARN L141 QuantifierPusher]: treesize reduction 26, result has 3.7 percent of original size [2021-02-22 02:22:33,547 WARN L147 QuantifierPusher]: treesize reduction 26, result has 3.7 percent of original size 1 [2021-02-22 02:22:33,548 WARN L141 QuantifierPusher]: treesize reduction 26, result has 3.7 percent of original size [2021-02-22 02:22:33,548 WARN L147 QuantifierPusher]: treesize reduction 26, result has 3.7 percent of original size 1 [2021-02-22 02:22:33,550 WARN L141 QuantifierPusher]: treesize reduction 2, result has 80.0 percent of original size [2021-02-22 02:22:33,554 WARN L147 QuantifierPusher]: treesize reduction 2, result has 80.0 percent of original size 8 [2021-02-22 02:22:33,559 WARN L141 QuantifierPusher]: treesize reduction 8, result has 75.0 percent of original size [2021-02-22 02:22:33,562 WARN L147 QuantifierPusher]: treesize reduction 8, result has 75.0 percent of original size 24 [2021-02-22 02:22:33,563 WARN L141 QuantifierPusher]: treesize reduction 11, result has 59.3 percent of original size [2021-02-22 02:22:33,565 WARN L147 QuantifierPusher]: treesize reduction 11, result has 59.3 percent of original size 16 [2021-02-22 02:22:33,566 WARN L141 QuantifierPusher]: treesize reduction 11, result has 59.3 percent of original size [2021-02-22 02:22:33,567 WARN L147 QuantifierPusher]: treesize reduction 11, result has 59.3 percent of original size 16 [2021-02-22 02:22:33,575 WARN L141 QuantifierPusher]: treesize reduction 6, result has 78.6 percent of original size [2021-02-22 02:22:33,576 INFO L723 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2021-02-22 02:22:33,578 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:33,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:22:33,582 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:33,588 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-02-22 02:22:33,589 WARN L147 QuantifierPusher]: treesize reduction 6, result has 78.6 percent of original size 22 [2021-02-22 02:22:33,591 WARN L141 QuantifierPusher]: treesize reduction 8, result has 84.6 percent of original size [2021-02-22 02:22:33,594 WARN L147 QuantifierPusher]: treesize reduction 8, result has 84.6 percent of original size 44 [2021-02-22 02:22:33,595 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-22 02:22:33,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:22:33,633 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:33,634 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:33,635 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:33,635 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:22:33,638 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:33,639 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:22:33,643 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:33,644 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:22:33,644 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:33,645 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:22:33,649 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:33,650 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:22:33,656 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:33,656 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:22:33,663 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:33,663 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:22:33,670 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:33,671 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:33,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:22:33,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:22:33,700 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:33,700 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:33,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-02-22 02:22:33,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:22:33,706 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:33,708 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:33,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-02-22 02:22:33,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:22:33,712 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:33,713 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:33,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-22 02:22:33,718 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:33,719 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-02-22 02:22:33,721 WARN L141 QuantifierPusher]: treesize reduction 7, result has 82.9 percent of original size [2021-02-22 02:22:33,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:22:33,723 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:33,724 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-02-22 02:22:33,727 WARN L147 QuantifierPusher]: treesize reduction 7, result has 82.9 percent of original size 34 [2021-02-22 02:22:33,761 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:33,761 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:22:33,762 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:33,762 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-22 02:22:33,775 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:33,776 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-22 02:22:33,794 WARN L141 QuantifierPusher]: treesize reduction 8, result has 57.9 percent of original size [2021-02-22 02:22:33,797 WARN L147 QuantifierPusher]: treesize reduction 8, result has 57.9 percent of original size 11 [2021-02-22 02:22:33,819 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:33,821 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-22 02:22:33,822 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:33,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:22:33,824 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:33,825 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:22:33,825 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-22 02:22:33,843 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:33,845 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-22 02:22:33,860 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:33,861 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-22 02:22:33,879 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:33,881 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-22 02:22:33,895 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:33,895 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-22 02:22:33,897 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:33,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:22:33,899 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:33,899 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:22:33,900 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-02-22 02:22:33,906 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:33,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:22:33,908 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:33,910 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-22 02:22:33,910 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:22:33,933 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:33,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:22:33,936 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:33,937 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-22 02:22:33,938 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:22:33,961 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:33,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:22:33,963 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:33,964 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-22 02:22:33,964 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-22 02:22:33,994 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:33,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:22:33,999 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:34,000 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-22 02:22:34,001 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-22 02:22:34,030 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:34,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:22:34,032 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:34,032 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-22 02:22:34,033 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-22 02:22:34,035 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:34,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:22:34,042 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:34,043 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-02-22 02:22:34,044 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-02-22 02:22:34,077 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:34,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:22:34,079 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:34,080 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-02-22 02:22:34,081 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-22 02:22:34,111 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:34,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:22:34,115 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:34,115 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-02-22 02:22:34,116 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-02-22 02:22:34,146 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:34,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:22:34,151 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:34,151 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-02-22 02:22:34,152 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-02-22 02:22:34,189 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:34,189 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:34,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [743083844] [2021-02-22 02:22:34,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:22:34,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-02-22 02:22:34,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198937592] [2021-02-22 02:22:34,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-22 02:22:34,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:22:34,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-22 02:22:34,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-02-22 02:22:34,193 INFO L87 Difference]: Start difference. First operand 137 states and 162 transitions. Second operand 21 states. [2021-02-22 02:22:36,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:22:36,638 INFO L93 Difference]: Finished difference Result 166 states and 200 transitions. [2021-02-22 02:22:36,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-22 02:22:36,639 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 63 [2021-02-22 02:22:36,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:22:36,643 INFO L225 Difference]: With dead ends: 166 [2021-02-22 02:22:36,643 INFO L226 Difference]: Without dead ends: 163 [2021-02-22 02:22:36,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=312, Invalid=1758, Unknown=0, NotChecked=0, Total=2070 [2021-02-22 02:22:36,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-02-22 02:22:36,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 154. [2021-02-22 02:22:36,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2021-02-22 02:22:36,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 185 transitions. [2021-02-22 02:22:36,711 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 185 transitions. Word has length 63 [2021-02-22 02:22:36,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:22:36,711 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 185 transitions. [2021-02-22 02:22:36,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-02-22 02:22:36,711 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 185 transitions. [2021-02-22 02:22:36,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-02-22 02:22:36,714 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:22:36,714 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 02:22:36,715 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-22 02:22:36,715 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:22:36,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:22:36,715 INFO L82 PathProgramCache]: Analyzing trace with hash 752235094, now seen corresponding path program 1 times [2021-02-22 02:22:36,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:22:36,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133921619] [2021-02-22 02:22:36,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:22:36,721 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:22:36,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:22:36,779 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:36,779 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:36,780 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:36,780 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:22:36,783 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:36,784 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:22:36,788 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:36,788 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:22:36,789 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:36,789 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:22:36,793 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:36,794 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:22:36,801 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:36,802 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:22:36,808 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:36,808 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:36,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:22:36,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:22:36,842 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:36,843 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:36,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-02-22 02:22:36,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:22:36,847 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:36,847 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:36,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-02-22 02:22:36,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:22:36,851 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:36,851 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:36,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-02-22 02:22:36,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:22:36,855 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:36,855 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:36,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-02-22 02:22:36,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:22:36,859 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:36,860 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:36,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:22:36,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133921619] [2021-02-22 02:22:36,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:22:36,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-22 02:22:36,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678719441] [2021-02-22 02:22:36,866 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-22 02:22:36,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:22:36,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-22 02:22:36,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-02-22 02:22:36,867 INFO L87 Difference]: Start difference. First operand 154 states and 185 transitions. Second operand 8 states. [2021-02-22 02:22:37,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:22:37,509 INFO L93 Difference]: Finished difference Result 160 states and 190 transitions. [2021-02-22 02:22:37,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-22 02:22:37,513 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2021-02-22 02:22:37,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:22:37,519 INFO L225 Difference]: With dead ends: 160 [2021-02-22 02:22:37,519 INFO L226 Difference]: Without dead ends: 152 [2021-02-22 02:22:37,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-02-22 02:22:37,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-02-22 02:22:37,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2021-02-22 02:22:37,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2021-02-22 02:22:37,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 181 transitions. [2021-02-22 02:22:37,552 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 181 transitions. Word has length 65 [2021-02-22 02:22:37,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:22:37,553 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 181 transitions. [2021-02-22 02:22:37,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-22 02:22:37,553 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 181 transitions. [2021-02-22 02:22:37,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-02-22 02:22:37,554 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:22:37,554 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 02:22:37,554 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-22 02:22:37,555 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:22:37,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:22:37,555 INFO L82 PathProgramCache]: Analyzing trace with hash 756048342, now seen corresponding path program 1 times [2021-02-22 02:22:37,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:22:37,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [839013493] [2021-02-22 02:22:37,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:22:37,557 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:22:37,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:22:37,605 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:37,606 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:37,607 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:37,607 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:22:37,610 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:37,611 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:22:37,615 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:37,615 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:22:37,622 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:37,623 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:22:37,629 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:37,629 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:22:37,636 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:37,637 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:22:37,644 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:37,646 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:22:37,655 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:37,657 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:37,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:22:37,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:22:37,694 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:37,695 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:37,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-02-22 02:22:37,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:22:37,699 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:37,699 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:37,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-02-22 02:22:37,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:22:37,703 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:37,704 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:37,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-02-22 02:22:37,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:22:37,707 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:37,708 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:37,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-02-22 02:22:37,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:22:37,711 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:37,712 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:37,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:22:37,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [839013493] [2021-02-22 02:22:37,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:22:37,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-22 02:22:37,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318764345] [2021-02-22 02:22:37,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-22 02:22:37,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:22:37,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-22 02:22:37,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-02-22 02:22:37,719 INFO L87 Difference]: Start difference. First operand 152 states and 181 transitions. Second operand 10 states. [2021-02-22 02:22:38,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:22:38,578 INFO L93 Difference]: Finished difference Result 168 states and 198 transitions. [2021-02-22 02:22:38,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-22 02:22:38,579 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 65 [2021-02-22 02:22:38,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:22:38,582 INFO L225 Difference]: With dead ends: 168 [2021-02-22 02:22:38,582 INFO L226 Difference]: Without dead ends: 166 [2021-02-22 02:22:38,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-02-22 02:22:38,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-02-22 02:22:38,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 161. [2021-02-22 02:22:38,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2021-02-22 02:22:38,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 190 transitions. [2021-02-22 02:22:38,614 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 190 transitions. Word has length 65 [2021-02-22 02:22:38,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:22:38,615 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 190 transitions. [2021-02-22 02:22:38,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-22 02:22:38,615 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 190 transitions. [2021-02-22 02:22:38,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-02-22 02:22:38,616 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:22:38,616 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 02:22:38,617 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-22 02:22:38,617 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:22:38,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:22:38,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1034317089, now seen corresponding path program 1 times [2021-02-22 02:22:38,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:22:38,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1223229732] [2021-02-22 02:22:38,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:22:38,619 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:22:38,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:22:38,659 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:38,660 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:38,661 WARN L141 QuantifierPusher]: treesize reduction 13, result has 23.5 percent of original size [2021-02-22 02:22:38,662 WARN L147 QuantifierPusher]: treesize reduction 13, result has 23.5 percent of original size 4 [2021-02-22 02:22:38,667 WARN L141 QuantifierPusher]: treesize reduction 5, result has 37.5 percent of original size [2021-02-22 02:22:38,668 WARN L147 QuantifierPusher]: treesize reduction 5, result has 37.5 percent of original size 3 [2021-02-22 02:22:38,675 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:38,675 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-22 02:22:38,680 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:38,681 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:22:38,686 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:38,687 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:22:38,693 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:38,693 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:22:38,701 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:38,701 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:38,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:22:38,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:22:38,740 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:38,741 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:38,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-02-22 02:22:38,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:22:38,748 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:38,749 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:38,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-02-22 02:22:38,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:22:38,753 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:38,754 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:38,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-02-22 02:22:38,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:22:38,760 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:38,760 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:38,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-02-22 02:22:38,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:22:38,770 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:38,770 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:22:38,779 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:38,780 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:22:38,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-02-22 02:22:38,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:22:38,788 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:38,788 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:38,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:22:38,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1223229732] [2021-02-22 02:22:38,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:22:38,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-22 02:22:38,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074410442] [2021-02-22 02:22:38,796 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-22 02:22:38,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:22:38,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-22 02:22:38,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-02-22 02:22:38,797 INFO L87 Difference]: Start difference. First operand 161 states and 190 transitions. Second operand 10 states. [2021-02-22 02:22:39,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:22:39,526 INFO L93 Difference]: Finished difference Result 167 states and 198 transitions. [2021-02-22 02:22:39,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-22 02:22:39,531 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 70 [2021-02-22 02:22:39,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:22:39,533 INFO L225 Difference]: With dead ends: 167 [2021-02-22 02:22:39,533 INFO L226 Difference]: Without dead ends: 165 [2021-02-22 02:22:39,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-02-22 02:22:39,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-02-22 02:22:39,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 163. [2021-02-22 02:22:39,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2021-02-22 02:22:39,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 194 transitions. [2021-02-22 02:22:39,567 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 194 transitions. Word has length 70 [2021-02-22 02:22:39,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:22:39,568 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 194 transitions. [2021-02-22 02:22:39,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-22 02:22:39,568 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 194 transitions. [2021-02-22 02:22:39,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-02-22 02:22:39,569 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:22:39,570 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 02:22:39,570 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-02-22 02:22:39,570 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:22:39,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:22:39,571 INFO L82 PathProgramCache]: Analyzing trace with hash -864516991, now seen corresponding path program 1 times [2021-02-22 02:22:39,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:22:39,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1304328469] [2021-02-22 02:22:39,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:22:39,589 WARN L141 QuantifierPusher]: treesize reduction 8, result has 70.4 percent of original size [2021-02-22 02:22:39,592 WARN L147 QuantifierPusher]: treesize reduction 8, result has 70.4 percent of original size 19 [2021-02-22 02:22:39,594 WARN L141 QuantifierPusher]: treesize reduction 8, result has 70.4 percent of original size [2021-02-22 02:22:39,595 WARN L147 QuantifierPusher]: treesize reduction 8, result has 70.4 percent of original size 19 [2021-02-22 02:22:39,603 WARN L141 QuantifierPusher]: treesize reduction 9, result has 73.5 percent of original size [2021-02-22 02:22:39,604 INFO L723 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2021-02-22 02:22:39,606 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:39,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:22:39,607 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:39,610 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-02-22 02:22:39,611 WARN L147 QuantifierPusher]: treesize reduction 9, result has 73.5 percent of original size 25 [2021-02-22 02:22:39,613 WARN L141 QuantifierPusher]: treesize reduction 8, result has 84.6 percent of original size [2021-02-22 02:22:39,615 WARN L147 QuantifierPusher]: treesize reduction 8, result has 84.6 percent of original size 44 [2021-02-22 02:22:39,616 WARN L141 QuantifierPusher]: treesize reduction 8, result has 70.4 percent of original size [2021-02-22 02:22:39,618 WARN L147 QuantifierPusher]: treesize reduction 8, result has 70.4 percent of original size 19 [2021-02-22 02:22:39,619 WARN L141 QuantifierPusher]: treesize reduction 8, result has 70.4 percent of original size [2021-02-22 02:22:39,621 WARN L147 QuantifierPusher]: treesize reduction 8, result has 70.4 percent of original size 19 [2021-02-22 02:22:39,632 WARN L141 QuantifierPusher]: treesize reduction 6, result has 76.0 percent of original size [2021-02-22 02:22:39,633 INFO L723 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2021-02-22 02:22:39,634 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:39,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:22:39,635 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:39,637 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-22 02:22:39,638 WARN L147 QuantifierPusher]: treesize reduction 6, result has 76.0 percent of original size 19 [2021-02-22 02:22:39,640 WARN L141 QuantifierPusher]: treesize reduction 8, result has 80.5 percent of original size [2021-02-22 02:22:39,641 WARN L147 QuantifierPusher]: treesize reduction 8, result has 80.5 percent of original size 33 [2021-02-22 02:22:39,642 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-22 02:22:39,643 WARN L141 QuantifierPusher]: treesize reduction 11, result has 59.3 percent of original size [2021-02-22 02:22:39,644 WARN L147 QuantifierPusher]: treesize reduction 11, result has 59.3 percent of original size 16 [2021-02-22 02:22:39,645 WARN L141 QuantifierPusher]: treesize reduction 11, result has 59.3 percent of original size [2021-02-22 02:22:39,646 WARN L147 QuantifierPusher]: treesize reduction 11, result has 59.3 percent of original size 16 [2021-02-22 02:22:39,653 WARN L141 QuantifierPusher]: treesize reduction 6, result has 78.6 percent of original size [2021-02-22 02:22:39,655 INFO L723 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2021-02-22 02:22:39,656 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:39,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:22:39,657 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:39,660 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-02-22 02:22:39,661 WARN L147 QuantifierPusher]: treesize reduction 6, result has 78.6 percent of original size 22 [2021-02-22 02:22:39,663 WARN L141 QuantifierPusher]: treesize reduction 8, result has 84.6 percent of original size [2021-02-22 02:22:39,665 WARN L147 QuantifierPusher]: treesize reduction 8, result has 84.6 percent of original size 44 [2021-02-22 02:22:39,666 WARN L141 QuantifierPusher]: treesize reduction 26, result has 3.7 percent of original size [2021-02-22 02:22:39,666 WARN L147 QuantifierPusher]: treesize reduction 26, result has 3.7 percent of original size 1 [2021-02-22 02:22:39,668 WARN L141 QuantifierPusher]: treesize reduction 26, result has 3.7 percent of original size [2021-02-22 02:22:39,668 WARN L147 QuantifierPusher]: treesize reduction 26, result has 3.7 percent of original size 1 [2021-02-22 02:22:39,670 WARN L141 QuantifierPusher]: treesize reduction 2, result has 80.0 percent of original size [2021-02-22 02:22:39,671 WARN L147 QuantifierPusher]: treesize reduction 2, result has 80.0 percent of original size 8 [2021-02-22 02:22:39,673 WARN L141 QuantifierPusher]: treesize reduction 8, result has 75.0 percent of original size [2021-02-22 02:22:39,674 WARN L147 QuantifierPusher]: treesize reduction 8, result has 75.0 percent of original size 24 [2021-02-22 02:22:39,674 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-22 02:22:39,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 02:22:39,686 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 02:22:39,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 02:22:39,696 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 02:22:39,721 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-22 02:22:39,722 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-22 02:22:39,722 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-02-22 02:22:39,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.02 02:22:39 BoogieIcfgContainer [2021-02-22 02:22:39,740 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-22 02:22:39,741 INFO L168 Benchmark]: Toolchain (without parser) took 14940.67 ms. Allocated memory was 151.0 MB in the beginning and 314.6 MB in the end (delta: 163.6 MB). Free memory was 127.3 MB in the beginning and 192.4 MB in the end (delta: -65.1 MB). Peak memory consumption was 99.4 MB. Max. memory is 8.0 GB. [2021-02-22 02:22:39,741 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory was 125.8 MB in the beginning and 125.7 MB in the end (delta: 77.8 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 02:22:39,741 INFO L168 Benchmark]: CACSL2BoogieTranslator took 330.15 ms. Allocated memory is still 151.0 MB. Free memory was 126.2 MB in the beginning and 116.1 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-22 02:22:39,742 INFO L168 Benchmark]: Boogie Preprocessor took 42.53 ms. Allocated memory is still 151.0 MB. Free memory was 116.1 MB in the beginning and 114.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-22 02:22:39,742 INFO L168 Benchmark]: RCFGBuilder took 565.09 ms. Allocated memory is still 151.0 MB. Free memory was 114.5 MB in the beginning and 126.3 MB in the end (delta: -11.8 MB). Peak memory consumption was 16.6 MB. Max. memory is 8.0 GB. [2021-02-22 02:22:39,742 INFO L168 Benchmark]: TraceAbstraction took 13979.25 ms. Allocated memory was 151.0 MB in the beginning and 314.6 MB in the end (delta: 163.6 MB). Free memory was 125.8 MB in the beginning and 192.4 MB in the end (delta: -66.6 MB). Peak memory consumption was 96.4 MB. Max. memory is 8.0 GB. [2021-02-22 02:22:39,744 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory was 125.8 MB in the beginning and 125.7 MB in the end (delta: 77.8 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 330.15 ms. Allocated memory is still 151.0 MB. Free memory was 126.2 MB in the beginning and 116.1 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 42.53 ms. Allocated memory is still 151.0 MB. Free memory was 116.1 MB in the beginning and 114.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 565.09 ms. Allocated memory is still 151.0 MB. Free memory was 114.5 MB in the beginning and 126.3 MB in the end (delta: -11.8 MB). Peak memory consumption was 16.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 13979.25 ms. Allocated memory was 151.0 MB in the beginning and 314.6 MB in the end (delta: 163.6 MB). Free memory was 125.8 MB in the beginning and 192.4 MB in the end (delta: -66.6 MB). Peak memory consumption was 96.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 19]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L26] int tagbuf_len; [L27] int t; [L28] tagbuf_len = __VERIFIER_nondet_int() [L29] COND TRUE tagbuf_len >= 1 [L30] t = 0 [L31] --tagbuf_len [L32] COND TRUE 1 [L33] COND FALSE !(t == tagbuf_len) [L38] COND FALSE !(__VERIFIER_nondet_int()) [L41] CALL __VERIFIER_assert(0 <= t) [L18] COND FALSE !(!(cond)) [L41] RET __VERIFIER_assert(0 <= t) [L42] CALL __VERIFIER_assert(t <= tagbuf_len) [L18] COND FALSE !(!(cond)) [L42] RET __VERIFIER_assert(t <= tagbuf_len) [L43] t++ [L32] COND TRUE 1 [L33] COND FALSE !(t == tagbuf_len) [L38] COND FALSE !(__VERIFIER_nondet_int()) [L41] CALL __VERIFIER_assert(0 <= t) [L18] COND FALSE !(!(cond)) [L41] RET __VERIFIER_assert(0 <= t) [L42] CALL __VERIFIER_assert(t <= tagbuf_len) [L18] COND FALSE !(!(cond)) [L42] RET __VERIFIER_assert(t <= tagbuf_len) [L43] t++ [L32] COND TRUE 1 [L33] COND FALSE !(t == tagbuf_len) [L38] COND TRUE __VERIFIER_nondet_int() [L45] CALL __VERIFIER_assert(0 <= t) [L18] COND FALSE !(!(cond)) [L45] RET __VERIFIER_assert(0 <= t) [L46] CALL __VERIFIER_assert(t <= tagbuf_len) [L18] COND TRUE !(cond) [L19] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 92 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 13.8s, OverallIterations: 12, TraceHistogramMax: 6, AutomataDifference: 9.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 796 SDtfs, 1319 SDslu, 1336 SDs, 0 SdLazy, 4634 SolverSat, 676 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 302 GetRequests, 102 SyntacticMatches, 9 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1241 ImplicationChecksByTransitivity, 4.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=163occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 11 MinimizatonAttempts, 46 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...