/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/verifythis/tree_del_iter.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 04:50:36,535 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 04:50:36,539 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 04:50:36,595 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-24 04:50:36,596 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-24 04:50:36,600 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-24 04:50:36,604 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-24 04:50:36,614 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-24 04:50:36,619 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-24 04:50:36,621 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-24 04:50:36,625 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-24 04:50:36,627 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-24 04:50:36,627 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 04:50:36,629 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 04:50:36,630 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 04:50:36,632 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 04:50:36,633 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 04:50:36,634 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 04:50:36,661 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 04:50:36,667 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 04:50:36,683 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 04:50:36,685 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 04:50:36,689 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 04:50:36,690 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 04:50:36,697 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-24 04:50:36,710 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-24 04:50:36,710 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-24 04:50:36,712 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-24 04:50:36,713 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-24 04:50:36,714 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-24 04:50:36,714 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-24 04:50:36,715 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-24 04:50:36,715 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-24 04:50:36,716 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-24 04:50:36,717 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-24 04:50:36,718 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-24 04:50:36,719 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-24 04:50:36,732 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 04:50:36,732 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 04:50:36,734 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 04:50:36,734 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 04:50:36,734 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 04:50:36,735 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 04:50:36,735 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 04:50:36,735 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 04:50:36,735 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 04:50:36,736 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 04:50:36,736 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 04:50:36,736 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 04:50:36,736 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 04:50:36,736 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 04:50:36,737 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 04:50:36,737 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 04:50:36,737 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 04:50:36,737 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 04:50:36,738 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 04:50:36,738 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 04:50:36,738 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 04:50:36,738 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 04:50:36,738 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-24 04:50:36,739 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-24 04:50:37,129 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 04:50:37,163 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 04:50:37,166 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 04:50:37,168 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 04:50:37,169 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 04:50:37,170 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_iter.c [2021-02-24 04:50:37,274 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/203471272/338a429d1d3b44d9a065a0761b1d3af5/FLAGc32775f75 [2021-02-24 04:50:37,973 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 04:50:37,974 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_iter.c [2021-02-24 04:50:37,997 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/203471272/338a429d1d3b44d9a065a0761b1d3af5/FLAGc32775f75 [2021-02-24 04:50:38,273 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/203471272/338a429d1d3b44d9a065a0761b1d3af5 [2021-02-24 04:50:38,276 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 04:50:38,290 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 04:50:38,291 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 04:50:38,292 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 04:50:38,300 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 04:50:38,301 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:50:38" (1/1) ... [2021-02-24 04:50:38,302 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36cd2dbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:50:38, skipping insertion in model container [2021-02-24 04:50:38,303 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:50:38" (1/1) ... [2021-02-24 04:50:38,312 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 04:50:38,342 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 04:50:38,498 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_iter.c[586,599] [2021-02-24 04:50:38,520 WARN L1501 CHandler]: Possible shadowing of function min [2021-02-24 04:50:38,536 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:50:38,554 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 04:50:38,569 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_iter.c[586,599] [2021-02-24 04:50:38,580 WARN L1501 CHandler]: Possible shadowing of function min [2021-02-24 04:50:38,593 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:50:38,617 INFO L208 MainTranslator]: Completed translation [2021-02-24 04:50:38,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:50:38 WrapperNode [2021-02-24 04:50:38,618 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 04:50:38,619 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 04:50:38,619 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 04:50:38,619 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 04:50:38,634 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:50:38" (1/1) ... [2021-02-24 04:50:38,634 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:50:38" (1/1) ... [2021-02-24 04:50:38,648 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:50:38" (1/1) ... [2021-02-24 04:50:38,648 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:50:38" (1/1) ... [2021-02-24 04:50:38,667 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:50:38" (1/1) ... [2021-02-24 04:50:38,674 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:50:38" (1/1) ... [2021-02-24 04:50:38,677 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:50:38" (1/1) ... [2021-02-24 04:50:38,682 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 04:50:38,683 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 04:50:38,684 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 04:50:38,684 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 04:50:38,685 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:50:38" (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 [2021-02-24 04:50:38,822 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 04:50:38,822 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 04:50:38,822 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_cycle_if_not [2021-02-24 04:50:38,822 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 04:50:38,823 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-24 04:50:38,823 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2021-02-24 04:50:38,823 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2021-02-24 04:50:38,823 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2021-02-24 04:50:38,823 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2021-02-24 04:50:38,823 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2021-02-24 04:50:38,824 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2021-02-24 04:50:38,824 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 04:50:38,824 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-02-24 04:50:38,824 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-02-24 04:50:38,824 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-24 04:50:38,824 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-02-24 04:50:38,825 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-24 04:50:38,825 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-02-24 04:50:38,825 INFO L130 BoogieDeclarations]: Found specification of procedure assume_cycle_if_not [2021-02-24 04:50:38,825 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 04:50:38,825 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 04:50:38,825 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 04:50:38,826 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 04:50:38,826 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-24 04:50:38,826 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2021-02-24 04:50:38,826 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-24 04:50:38,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 04:50:38,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-02-24 04:50:38,827 INFO L130 BoogieDeclarations]: Found specification of procedure min [2021-02-24 04:50:38,827 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 04:50:38,827 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-02-24 04:50:38,827 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2021-02-24 04:50:38,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 04:50:38,827 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2021-02-24 04:50:38,827 INFO L130 BoogieDeclarations]: Found specification of procedure size [2021-02-24 04:50:38,828 INFO L130 BoogieDeclarations]: Found specification of procedure task [2021-02-24 04:50:38,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-02-24 04:50:38,828 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 04:50:38,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 04:50:38,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 04:50:38,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 04:50:39,803 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 04:50:39,803 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-02-24 04:50:39,805 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:50:39 BoogieIcfgContainer [2021-02-24 04:50:39,805 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 04:50:39,807 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 04:50:39,807 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 04:50:39,810 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 04:50:39,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 04:50:38" (1/3) ... [2021-02-24 04:50:39,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e2b8ec4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:50:39, skipping insertion in model container [2021-02-24 04:50:39,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:50:38" (2/3) ... [2021-02-24 04:50:39,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e2b8ec4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:50:39, skipping insertion in model container [2021-02-24 04:50:39,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:50:39" (3/3) ... [2021-02-24 04:50:39,814 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_iter.c [2021-02-24 04:50:39,819 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 04:50:39,823 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 04:50:39,842 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 04:50:39,865 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 04:50:39,866 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 04:50:39,866 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-24 04:50:39,866 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 04:50:39,866 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 04:50:39,866 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 04:50:39,866 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 04:50:39,867 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 04:50:39,887 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states. [2021-02-24 04:50:39,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-02-24 04:50:39,903 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:50:39,904 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:50:39,904 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:50:39,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:50:39,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1920344426, now seen corresponding path program 1 times [2021-02-24 04:50:39,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:50:39,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1848709139] [2021-02-24 04:50:39,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:50:40,007 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:50:40,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:50:40,255 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:40,257 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:50:40,259 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:40,260 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:50:40,276 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:40,277 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:50:40,283 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:40,284 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:50:40,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:50:40,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:50:40,326 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:40,327 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:50:40,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-02-24 04:50:40,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:50:40,356 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:40,358 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:50:40,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-02-24 04:50:40,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:50:40,371 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:40,372 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:50:40,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-24 04:50:40,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:50:40,395 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:40,397 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:50:40,400 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:40,401 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:50:40,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-02-24 04:50:40,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:50:40,439 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:40,442 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:50:40,458 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:40,461 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:50:40,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-02-24 04:50:40,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:50:40,493 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:40,494 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:50:40,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-02-24 04:50:40,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:50:40,518 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:40,519 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:50:40,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:50:40,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1848709139] [2021-02-24 04:50:40,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:50:40,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-02-24 04:50:40,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581464155] [2021-02-24 04:50:40,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-24 04:50:40,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:50:40,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-24 04:50:40,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-02-24 04:50:40,567 INFO L87 Difference]: Start difference. First operand 212 states. Second operand 11 states. [2021-02-24 04:50:41,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:50:41,965 INFO L93 Difference]: Finished difference Result 372 states and 433 transitions. [2021-02-24 04:50:41,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-24 04:50:41,967 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 65 [2021-02-24 04:50:41,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:50:41,984 INFO L225 Difference]: With dead ends: 372 [2021-02-24 04:50:41,985 INFO L226 Difference]: Without dead ends: 215 [2021-02-24 04:50:41,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-02-24 04:50:42,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-02-24 04:50:42,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 201. [2021-02-24 04:50:42,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2021-02-24 04:50:42,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 225 transitions. [2021-02-24 04:50:42,089 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 225 transitions. Word has length 65 [2021-02-24 04:50:42,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:50:42,090 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 225 transitions. [2021-02-24 04:50:42,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-24 04:50:42,091 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 225 transitions. [2021-02-24 04:50:42,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-02-24 04:50:42,096 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:50:42,096 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:50:42,097 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 04:50:42,097 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:50:42,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:50:42,098 INFO L82 PathProgramCache]: Analyzing trace with hash -643807836, now seen corresponding path program 1 times [2021-02-24 04:50:42,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:50:42,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598868888] [2021-02-24 04:50:42,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:50:42,103 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:50:42,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:50:42,217 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:42,217 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:50:42,229 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:42,230 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:50:42,237 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:42,238 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:50:42,246 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:42,249 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:50:42,258 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:42,259 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:50:42,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:50:42,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:50:42,299 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:42,300 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:50:42,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-02-24 04:50:42,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:50:42,350 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:42,351 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:50:42,352 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:42,353 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-24 04:50:42,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-02-24 04:50:42,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:50:42,377 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:42,378 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:50:42,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-24 04:50:42,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:50:42,400 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:42,401 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:50:42,416 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:42,418 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-24 04:50:42,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-24 04:50:42,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:50:42,442 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:42,443 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:50:42,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-24 04:50:42,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:50:42,449 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:42,449 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:50:42,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-02-24 04:50:42,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:50:42,456 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:42,457 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:50:42,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-02-24 04:50:42,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:50:42,476 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:42,477 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:50:42,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-02-24 04:50:42,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:50:42,502 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:42,503 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:50:42,523 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-24 04:50:42,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1598868888] [2021-02-24 04:50:42,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:50:42,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-02-24 04:50:42,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096647474] [2021-02-24 04:50:42,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-24 04:50:42,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:50:42,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-24 04:50:42,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-02-24 04:50:42,527 INFO L87 Difference]: Start difference. First operand 201 states and 225 transitions. Second operand 12 states. [2021-02-24 04:50:44,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:50:44,219 INFO L93 Difference]: Finished difference Result 359 states and 405 transitions. [2021-02-24 04:50:44,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-24 04:50:44,219 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 85 [2021-02-24 04:50:44,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:50:44,224 INFO L225 Difference]: With dead ends: 359 [2021-02-24 04:50:44,224 INFO L226 Difference]: Without dead ends: 214 [2021-02-24 04:50:44,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-02-24 04:50:44,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-02-24 04:50:44,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 203. [2021-02-24 04:50:44,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2021-02-24 04:50:44,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 228 transitions. [2021-02-24 04:50:44,273 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 228 transitions. Word has length 85 [2021-02-24 04:50:44,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:50:44,273 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 228 transitions. [2021-02-24 04:50:44,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-24 04:50:44,274 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 228 transitions. [2021-02-24 04:50:44,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-02-24 04:50:44,276 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:50:44,277 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:50:44,277 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 04:50:44,277 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:50:44,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:50:44,278 INFO L82 PathProgramCache]: Analyzing trace with hash -89407090, now seen corresponding path program 1 times [2021-02-24 04:50:44,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:50:44,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746253039] [2021-02-24 04:50:44,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:50:44,283 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:50:44,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:50:44,355 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:44,358 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:50:44,360 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:44,361 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:50:44,370 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:44,371 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:50:44,376 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:44,377 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:50:44,385 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:44,385 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:50:44,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:50:44,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:50:44,435 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:44,435 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:50:44,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-02-24 04:50:44,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:50:44,524 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:44,525 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:50:44,527 WARN L141 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size [2021-02-24 04:50:44,528 WARN L147 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size 9 [2021-02-24 04:50:44,544 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:44,545 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-24 04:50:44,564 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:44,566 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-24 04:50:44,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-02-24 04:50:44,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:50:44,596 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:44,601 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:50:44,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-24 04:50:44,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:50:44,615 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:44,617 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:50:44,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-02-24 04:50:44,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:50:44,633 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:44,634 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:50:44,646 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:44,647 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:50:44,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-02-24 04:50:44,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:50:44,688 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:44,689 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:50:44,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-24 04:50:44,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:50:44,695 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:44,696 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:50:44,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-24 04:50:44,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:50:44,704 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:44,705 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:50:44,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-02-24 04:50:44,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:50:44,712 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:44,713 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:50:44,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-02-24 04:50:44,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:50:44,732 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:44,733 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:50:44,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-02-24 04:50:44,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:50:44,760 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:44,762 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:50:44,782 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-02-24 04:50:44,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746253039] [2021-02-24 04:50:44,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:50:44,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-02-24 04:50:44,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692991593] [2021-02-24 04:50:44,788 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-24 04:50:44,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:50:44,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-24 04:50:44,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-02-24 04:50:44,790 INFO L87 Difference]: Start difference. First operand 203 states and 228 transitions. Second operand 14 states. [2021-02-24 04:50:46,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:50:46,441 INFO L93 Difference]: Finished difference Result 358 states and 404 transitions. [2021-02-24 04:50:46,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-24 04:50:46,442 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 106 [2021-02-24 04:50:46,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:50:46,445 INFO L225 Difference]: With dead ends: 358 [2021-02-24 04:50:46,445 INFO L226 Difference]: Without dead ends: 216 [2021-02-24 04:50:46,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-02-24 04:50:46,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-02-24 04:50:46,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 205. [2021-02-24 04:50:46,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2021-02-24 04:50:46,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 231 transitions. [2021-02-24 04:50:46,491 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 231 transitions. Word has length 106 [2021-02-24 04:50:46,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:50:46,491 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 231 transitions. [2021-02-24 04:50:46,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-02-24 04:50:46,491 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 231 transitions. [2021-02-24 04:50:46,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-02-24 04:50:46,494 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:50:46,494 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:50:46,494 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-24 04:50:46,494 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:50:46,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:50:46,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1296382630, now seen corresponding path program 1 times [2021-02-24 04:50:46,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:50:46,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [275362474] [2021-02-24 04:50:46,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:50:46,499 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:50:46,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:50:46,559 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:46,560 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:50:46,560 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:46,561 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:50:46,564 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:46,565 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:50:46,569 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:46,570 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:50:46,575 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:46,576 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:50:46,582 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:46,583 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:50:46,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:50:46,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:50:46,637 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:46,638 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:50:46,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-02-24 04:50:46,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:50:46,675 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:46,676 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:50:46,677 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:46,678 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:50:46,691 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:46,693 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:50:46,707 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:46,709 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:50:46,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-02-24 04:50:46,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:50:46,728 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:46,729 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:50:46,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-24 04:50:46,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:50:46,734 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:46,734 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:50:46,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-02-24 04:50:46,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:50:46,751 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:46,752 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:50:46,768 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:46,768 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-24 04:50:46,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-02-24 04:50:46,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:50:46,789 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:46,789 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:50:46,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-24 04:50:46,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:50:46,794 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:46,797 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:50:46,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-02-24 04:50:46,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:50:46,807 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:46,808 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:50:46,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-24 04:50:46,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:50:46,810 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:46,811 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:50:46,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-24 04:50:46,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:50:46,813 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:46,814 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:50:46,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-02-24 04:50:46,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:50:46,818 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:46,818 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:50:46,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-02-24 04:50:46,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:50:46,838 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:46,840 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:50:46,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-02-24 04:50:46,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:50:46,867 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:46,868 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:50:46,883 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:46,883 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:50:46,930 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-02-24 04:50:46,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [275362474] [2021-02-24 04:50:46,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:50:46,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-02-24 04:50:46,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857715896] [2021-02-24 04:50:46,931 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-24 04:50:46,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:50:46,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-24 04:50:46,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-02-24 04:50:46,932 INFO L87 Difference]: Start difference. First operand 205 states and 231 transitions. Second operand 17 states. [2021-02-24 04:50:49,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:50:49,087 INFO L93 Difference]: Finished difference Result 341 states and 383 transitions. [2021-02-24 04:50:49,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-24 04:50:49,088 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 132 [2021-02-24 04:50:49,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:50:49,091 INFO L225 Difference]: With dead ends: 341 [2021-02-24 04:50:49,091 INFO L226 Difference]: Without dead ends: 216 [2021-02-24 04:50:49,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2021-02-24 04:50:49,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-02-24 04:50:49,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 207. [2021-02-24 04:50:49,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2021-02-24 04:50:49,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 235 transitions. [2021-02-24 04:50:49,135 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 235 transitions. Word has length 132 [2021-02-24 04:50:49,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:50:49,135 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 235 transitions. [2021-02-24 04:50:49,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-02-24 04:50:49,136 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 235 transitions. [2021-02-24 04:50:49,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-02-24 04:50:49,138 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:50:49,138 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:50:49,138 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-24 04:50:49,138 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:50:49,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:50:49,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1254504573, now seen corresponding path program 1 times [2021-02-24 04:50:49,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:50:49,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [191873369] [2021-02-24 04:50:49,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:50:49,142 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:50:49,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 04:50:49,185 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 04:50:49,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 04:50:49,249 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 04:50:49,319 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-24 04:50:49,319 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-24 04:50:49,320 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-24 04:50:49,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 04:50:49 BoogieIcfgContainer [2021-02-24 04:50:49,344 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 04:50:49,346 INFO L168 Benchmark]: Toolchain (without parser) took 11067.14 ms. Allocated memory was 155.2 MB in the beginning and 269.5 MB in the end (delta: 114.3 MB). Free memory was 138.9 MB in the beginning and 107.6 MB in the end (delta: 31.3 MB). Peak memory consumption was 144.9 MB. Max. memory is 8.0 GB. [2021-02-24 04:50:49,347 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 155.2 MB. Free memory was 129.6 MB in the beginning and 129.4 MB in the end (delta: 141.6 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 04:50:49,347 INFO L168 Benchmark]: CACSL2BoogieTranslator took 326.91 ms. Allocated memory is still 155.2 MB. Free memory was 137.8 MB in the beginning and 125.6 MB in the end (delta: 12.2 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-02-24 04:50:49,348 INFO L168 Benchmark]: Boogie Preprocessor took 63.49 ms. Allocated memory is still 155.2 MB. Free memory was 125.6 MB in the beginning and 123.1 MB in the end (delta: 2.5 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-02-24 04:50:49,348 INFO L168 Benchmark]: RCFGBuilder took 1122.07 ms. Allocated memory is still 155.2 MB. Free memory was 123.1 MB in the beginning and 95.7 MB in the end (delta: 27.4 MB). Peak memory consumption was 27.3 MB. Max. memory is 8.0 GB. [2021-02-24 04:50:49,349 INFO L168 Benchmark]: TraceAbstraction took 9537.51 ms. Allocated memory was 155.2 MB in the beginning and 269.5 MB in the end (delta: 114.3 MB). Free memory was 95.1 MB in the beginning and 107.6 MB in the end (delta: -12.5 MB). Peak memory consumption was 102.2 MB. Max. memory is 8.0 GB. [2021-02-24 04:50:49,352 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 155.2 MB. Free memory was 129.6 MB in the beginning and 129.4 MB in the end (delta: 141.6 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 326.91 ms. Allocated memory is still 155.2 MB. Free memory was 137.8 MB in the beginning and 125.6 MB in the end (delta: 12.2 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 63.49 ms. Allocated memory is still 155.2 MB. Free memory was 125.6 MB in the beginning and 123.1 MB in the end (delta: 2.5 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1122.07 ms. Allocated memory is still 155.2 MB. Free memory was 123.1 MB in the beginning and 95.7 MB in the end (delta: 27.4 MB). Peak memory consumption was 27.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 9537.51 ms. Allocated memory was 155.2 MB in the beginning and 269.5 MB in the end (delta: 114.3 MB). Free memory was 95.1 MB in the beginning and 107.6 MB in the end (delta: -12.5 MB). Peak memory consumption was 102.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L110] CALL, EXPR nondet_tree() [L25] COND FALSE !(__VERIFIER_nondet_bool()) [L28] struct node *n = (struct node *)malloc(sizeof(struct node)); [L29] n->data = __VERIFIER_nondet_int() [L30] CALL, EXPR nondet_tree() [L25] COND TRUE __VERIFIER_nondet_bool() [L26] return 0; [L30] RET, EXPR nondet_tree() [L30] n->left = nondet_tree() [L31] CALL, EXPR nondet_tree() [L25] COND TRUE __VERIFIER_nondet_bool() [L26] return 0; [L31] RET, EXPR nondet_tree() [L31] n->right = nondet_tree() [L32] return n; [L110] RET, EXPR nondet_tree() [L110] CALL task(nondet_tree()) [L86] CALL, EXPR min(t) [L37] COND FALSE !(!n) [L40] EXPR n->data [L40] int a = n->data; [L41] EXPR n->left [L41] CALL, EXPR min(n->left) [L37] COND TRUE !n [L38] return 2147483647; [L41] RET, EXPR min(n->left) [L41] int b = min(n->left); [L42] EXPR n->right [L42] CALL, EXPR min(n->right) [L37] COND TRUE !n [L38] return 2147483647; [L42] RET, EXPR min(n->right) [L42] int c = min(n->right); [L43] COND TRUE b <= a && b <= c [L43] return b; [L86] RET, EXPR min(t) [L86] int a = min(t); [L87] int b; [L89] CALL, EXPR size(t) [L81] COND FALSE !(!t) [L82] EXPR t->left [L82] CALL, EXPR size(t->left) [L81] COND TRUE !t [L81] return 0; [L82] RET, EXPR size(t->left) [L82] EXPR t->right [L82] CALL, EXPR size(t->right) [L81] COND TRUE !t [L81] return 0; [L82] RET, EXPR size(t->right) [L82] return size(t->left) + size(t->right) + 1; [L89] RET, EXPR size(t) [L89] int n = size(t); [L90] CALL assume_cycle_if_not(n != 0) [L9] COND FALSE !(!cond) [L90] RET assume_cycle_if_not(n != 0) [L91] EXPR, FCALL calloc(n, sizeof(int)) [L91] int *x = calloc(n, sizeof(int)); [L92] CALL tree_inorder(t, x, n) [L70] COND FALSE !(!t) [L73] EXPR t->left [L73] CALL, EXPR tree_inorder(t->left, a, i) [L70] COND TRUE !t [L71] return i; [L73] RET, EXPR tree_inorder(t->left, a, i) [L73] i = tree_inorder(t->left, a, i) [L74] EXPR i++ [L74] EXPR t->data [L74] a[i++] = t->data [L75] EXPR t->right [L75] CALL, EXPR tree_inorder(t->right, a, i) [L70] COND TRUE !t [L71] return i; [L75] RET, EXPR tree_inorder(t->right, a, i) [L75] i = tree_inorder(t->right, a, i) [L76] return i; [L92] RET tree_inorder(t, x, n) [L93] EXPR x[0] [L93] CALL __VERIFIER_assert(a == x[0]) [L16] COND TRUE !cond [L16] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 13 procedures, 215 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 9.4s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 6.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 737 SDtfs, 1770 SDslu, 2298 SDs, 0 SdLazy, 5098 SolverSat, 573 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 163 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=212occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 4 MinimizatonAttempts, 45 StatesRemovedByMinimization, 4 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...