/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/verifythis/tree_del_iter.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 11:34:29,474 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 11:34:29,477 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 11:34:29,494 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 11:34:29,495 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 11:34:29,497 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 11:34:29,499 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 11:34:29,510 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 11:34:29,513 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 11:34:29,516 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 11:34:29,518 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 11:34:29,521 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 11:34:29,522 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 11:34:29,524 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 11:34:29,527 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 11:34:29,528 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 11:34:29,530 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 11:34:29,531 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 11:34:29,532 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 11:34:29,537 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 11:34:29,544 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 11:34:29,548 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 11:34:29,550 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 11:34:29,550 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 11:34:29,553 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 11:34:29,565 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 11:34:29,567 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 11:34:29,568 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 11:34:29,570 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-07 11:34:29,612 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 11:34:29,615 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 11:34:29,617 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-07 11:34:29,617 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-07 11:34:29,617 INFO L138 SettingsManager]: * Use SBE=true [2020-07-07 11:34:29,617 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 11:34:29,618 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 11:34:29,618 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 11:34:29,618 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 11:34:29,619 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 11:34:29,620 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 11:34:29,620 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 11:34:29,620 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 11:34:29,620 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 11:34:29,620 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 11:34:29,621 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 11:34:29,621 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 11:34:29,621 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 11:34:29,621 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-07 11:34:29,621 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 11:34:29,622 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 11:34:29,622 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:34:29,622 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 11:34:29,623 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-07 11:34:29,624 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-07 11:34:29,624 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-07 11:34:29,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-07 11:34:29,624 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 11:34:29,624 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-07 11:34:29,625 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-07 11:34:29,921 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 11:34:29,933 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 11:34:29,938 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 11:34:29,939 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 11:34:29,940 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 11:34:29,940 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_iter.c [2020-07-07 11:34:30,029 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a9eb2185/32703a12e4f44d5fb9672054de4ab8c9/FLAG83f8fc59f [2020-07-07 11:34:30,696 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 11:34:30,698 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_iter.c [2020-07-07 11:34:30,710 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a9eb2185/32703a12e4f44d5fb9672054de4ab8c9/FLAG83f8fc59f [2020-07-07 11:34:30,926 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a9eb2185/32703a12e4f44d5fb9672054de4ab8c9 [2020-07-07 11:34:30,940 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 11:34:30,943 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 11:34:30,944 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 11:34:30,945 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 11:34:30,949 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 11:34:30,951 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:34:30" (1/1) ... [2020-07-07 11:34:30,955 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ce77b0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:34:30, skipping insertion in model container [2020-07-07 11:34:30,955 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:34:30" (1/1) ... [2020-07-07 11:34:30,964 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 11:34:30,996 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 11:34:31,267 WARN L1484 CHandler]: Possible shadowing of function min [2020-07-07 11:34:31,286 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:34:31,307 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 11:34:31,453 WARN L1484 CHandler]: Possible shadowing of function min [2020-07-07 11:34:31,469 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:34:31,495 INFO L208 MainTranslator]: Completed translation [2020-07-07 11:34:31,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:34:31 WrapperNode [2020-07-07 11:34:31,495 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 11:34:31,496 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 11:34:31,496 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 11:34:31,496 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 11:34:31,511 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:34:31" (1/1) ... [2020-07-07 11:34:31,511 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:34:31" (1/1) ... [2020-07-07 11:34:31,527 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:34:31" (1/1) ... [2020-07-07 11:34:31,527 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:34:31" (1/1) ... [2020-07-07 11:34:31,547 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:34:31" (1/1) ... [2020-07-07 11:34:31,555 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:34:31" (1/1) ... [2020-07-07 11:34:31,559 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:34:31" (1/1) ... [2020-07-07 11:34:31,564 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 11:34:31,565 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 11:34:31,565 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 11:34:31,565 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 11:34:31,567 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:34:31" (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 [2020-07-07 11:34:31,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 11:34:31,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 11:34:31,648 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_cycle_if_not [2020-07-07 11:34:31,648 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-07 11:34:31,648 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-07-07 11:34:31,648 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2020-07-07 11:34:31,648 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2020-07-07 11:34:31,649 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2020-07-07 11:34:31,649 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2020-07-07 11:34:31,649 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2020-07-07 11:34:31,649 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 11:34:31,649 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-07-07 11:34:31,650 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-07 11:34:31,650 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-07 11:34:31,650 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-07 11:34:31,650 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 11:34:31,650 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-07 11:34:31,650 INFO L130 BoogieDeclarations]: Found specification of procedure assume_cycle_if_not [2020-07-07 11:34:31,651 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 11:34:31,651 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-07 11:34:31,651 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-07-07 11:34:31,651 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-07 11:34:31,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-07 11:34:31,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-07 11:34:31,652 INFO L130 BoogieDeclarations]: Found specification of procedure min [2020-07-07 11:34:31,652 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-07 11:34:31,652 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-07 11:34:31,652 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2020-07-07 11:34:31,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-07 11:34:31,653 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2020-07-07 11:34:31,653 INFO L130 BoogieDeclarations]: Found specification of procedure size [2020-07-07 11:34:31,653 INFO L130 BoogieDeclarations]: Found specification of procedure task [2020-07-07 11:34:31,653 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-07 11:34:31,653 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-07-07 11:34:31,654 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 11:34:31,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 11:34:31,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 11:34:32,369 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 11:34:32,369 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-07 11:34:32,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:34:32 BoogieIcfgContainer [2020-07-07 11:34:32,387 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 11:34:32,390 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 11:34:32,390 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 11:34:32,395 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 11:34:32,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 11:34:30" (1/3) ... [2020-07-07 11:34:32,398 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75c549bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:34:32, skipping insertion in model container [2020-07-07 11:34:32,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:34:31" (2/3) ... [2020-07-07 11:34:32,399 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75c549bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:34:32, skipping insertion in model container [2020-07-07 11:34:32,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:34:32" (3/3) ... [2020-07-07 11:34:32,402 INFO L109 eAbstractionObserver]: Analyzing ICFG tree_del_iter.c [2020-07-07 11:34:32,416 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-07 11:34:32,427 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 11:34:32,444 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 11:34:32,480 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 11:34:32,480 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 11:34:32,480 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-07 11:34:32,481 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 11:34:32,481 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 11:34:32,481 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 11:34:32,482 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 11:34:32,482 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 11:34:32,518 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states. [2020-07-07 11:34:32,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-07-07 11:34:32,534 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:34:32,537 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] [2020-07-07 11:34:32,538 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:34:32,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:34:32,546 INFO L82 PathProgramCache]: Analyzing trace with hash 806421993, now seen corresponding path program 1 times [2020-07-07 11:34:32,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:34:32,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218999703] [2020-07-07 11:34:32,555 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:34:32,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:32,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:32,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:32,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:32,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:32,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:33,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:33,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:33,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:34:33,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218999703] [2020-07-07 11:34:33,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:34:33,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-07-07 11:34:33,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731329169] [2020-07-07 11:34:33,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-07 11:34:33,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:34:33,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-07 11:34:33,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-07-07 11:34:33,112 INFO L87 Difference]: Start difference. First operand 98 states. Second operand 11 states. [2020-07-07 11:34:34,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:34:34,056 INFO L93 Difference]: Finished difference Result 174 states and 235 transitions. [2020-07-07 11:34:34,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-07 11:34:34,059 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-07-07 11:34:34,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:34:34,088 INFO L225 Difference]: With dead ends: 174 [2020-07-07 11:34:34,088 INFO L226 Difference]: Without dead ends: 98 [2020-07-07 11:34:34,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-07-07 11:34:34,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-07-07 11:34:34,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 91. [2020-07-07 11:34:34,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-07-07 11:34:34,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 115 transitions. [2020-07-07 11:34:34,236 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 115 transitions. Word has length 44 [2020-07-07 11:34:34,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:34:34,238 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 115 transitions. [2020-07-07 11:34:34,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-07 11:34:34,239 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 115 transitions. [2020-07-07 11:34:34,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-07 11:34:34,246 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:34:34,246 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-07-07 11:34:34,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 11:34:34,247 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:34:34,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:34:34,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1561052270, now seen corresponding path program 1 times [2020-07-07 11:34:34,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:34:34,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130576909] [2020-07-07 11:34:34,249 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:34:34,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:34,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:34,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:34,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:34,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:34,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:34,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:34,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:34,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:34,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:34,770 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-07 11:34:34,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130576909] [2020-07-07 11:34:34,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702129360] [2020-07-07 11:34:34,772 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:34:34,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:34,895 INFO L264 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-07 11:34:34,906 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:34:34,985 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-07 11:34:34,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:34:34,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 12 [2020-07-07 11:34:34,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039644359] [2020-07-07 11:34:34,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-07 11:34:34,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:34:34,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-07 11:34:34,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-07-07 11:34:35,002 INFO L87 Difference]: Start difference. First operand 91 states and 115 transitions. Second operand 12 states. [2020-07-07 11:34:36,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:34:36,022 INFO L93 Difference]: Finished difference Result 165 states and 211 transitions. [2020-07-07 11:34:36,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-07 11:34:36,028 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 56 [2020-07-07 11:34:36,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:34:36,032 INFO L225 Difference]: With dead ends: 165 [2020-07-07 11:34:36,032 INFO L226 Difference]: Without dead ends: 97 [2020-07-07 11:34:36,035 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-07-07 11:34:36,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-07-07 11:34:36,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 93. [2020-07-07 11:34:36,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-07-07 11:34:36,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 118 transitions. [2020-07-07 11:34:36,062 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 118 transitions. Word has length 56 [2020-07-07 11:34:36,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:34:36,063 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 118 transitions. [2020-07-07 11:34:36,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-07 11:34:36,064 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 118 transitions. [2020-07-07 11:34:36,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-07-07 11:34:36,067 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:34:36,068 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-07-07 11:34:36,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-07 11:34:36,283 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:34:36,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:34:36,284 INFO L82 PathProgramCache]: Analyzing trace with hash -217941329, now seen corresponding path program 1 times [2020-07-07 11:34:36,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:34:36,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468953554] [2020-07-07 11:34:36,285 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:34:36,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:36,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:36,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:36,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:36,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:36,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:36,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:36,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:36,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:36,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:36,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:36,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:36,631 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-07 11:34:36,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468953554] [2020-07-07 11:34:36,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:34:36,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-07-07 11:34:36,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119075252] [2020-07-07 11:34:36,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-07 11:34:36,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:34:36,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-07 11:34:36,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-07-07 11:34:36,636 INFO L87 Difference]: Start difference. First operand 93 states and 118 transitions. Second operand 13 states. [2020-07-07 11:34:37,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:34:37,520 INFO L93 Difference]: Finished difference Result 164 states and 210 transitions. [2020-07-07 11:34:37,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-07 11:34:37,521 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 66 [2020-07-07 11:34:37,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:34:37,525 INFO L225 Difference]: With dead ends: 164 [2020-07-07 11:34:37,526 INFO L226 Difference]: Without dead ends: 99 [2020-07-07 11:34:37,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-07-07 11:34:37,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-07-07 11:34:37,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2020-07-07 11:34:37,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-07-07 11:34:37,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 121 transitions. [2020-07-07 11:34:37,551 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 121 transitions. Word has length 66 [2020-07-07 11:34:37,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:34:37,551 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 121 transitions. [2020-07-07 11:34:37,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-07 11:34:37,552 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 121 transitions. [2020-07-07 11:34:37,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-07 11:34:37,554 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:34:37,554 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:34:37,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 11:34:37,555 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:34:37,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:34:37,555 INFO L82 PathProgramCache]: Analyzing trace with hash -62868055, now seen corresponding path program 1 times [2020-07-07 11:34:37,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:34:37,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315269650] [2020-07-07 11:34:37,556 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:34:37,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:37,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:37,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:37,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:37,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:37,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:37,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:37,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:37,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:37,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:37,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:37,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:38,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:38,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:38,107 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-07-07 11:34:38,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315269650] [2020-07-07 11:34:38,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300557440] [2020-07-07 11:34:38,108 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:34:38,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:38,240 INFO L264 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 31 conjunts are in the unsatisfiable core [2020-07-07 11:34:38,247 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:34:38,337 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-07-07 11:34:38,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:34:38,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 18 [2020-07-07 11:34:38,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687946305] [2020-07-07 11:34:38,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-07 11:34:38,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:34:38,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-07 11:34:38,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2020-07-07 11:34:38,341 INFO L87 Difference]: Start difference. First operand 95 states and 121 transitions. Second operand 18 states. [2020-07-07 11:34:39,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:34:39,561 INFO L93 Difference]: Finished difference Result 152 states and 194 transitions. [2020-07-07 11:34:39,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-07 11:34:39,562 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 79 [2020-07-07 11:34:39,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:34:39,569 INFO L225 Difference]: With dead ends: 152 [2020-07-07 11:34:39,569 INFO L226 Difference]: Without dead ends: 99 [2020-07-07 11:34:39,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2020-07-07 11:34:39,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-07-07 11:34:39,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2020-07-07 11:34:39,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-07-07 11:34:39,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 125 transitions. [2020-07-07 11:34:39,590 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 125 transitions. Word has length 79 [2020-07-07 11:34:39,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:34:39,591 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 125 transitions. [2020-07-07 11:34:39,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-07 11:34:39,591 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 125 transitions. [2020-07-07 11:34:39,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-07-07 11:34:39,593 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:34:39,594 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2020-07-07 11:34:39,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:34:39,798 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:34:39,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:34:39,799 INFO L82 PathProgramCache]: Analyzing trace with hash -708508396, now seen corresponding path program 1 times [2020-07-07 11:34:39,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:34:39,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178950718] [2020-07-07 11:34:39,801 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:34:39,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 11:34:39,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 11:34:39,984 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-07 11:34:39,984 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-07 11:34:39,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-07 11:34:40,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 11:34:40 BoogieIcfgContainer [2020-07-07 11:34:40,118 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 11:34:40,123 INFO L168 Benchmark]: Toolchain (without parser) took 9178.70 ms. Allocated memory was 145.8 MB in the beginning and 308.8 MB in the end (delta: 163.1 MB). Free memory was 102.3 MB in the beginning and 253.8 MB in the end (delta: -151.5 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. [2020-07-07 11:34:40,125 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 145.8 MB. Free memory was 120.8 MB in the beginning and 120.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-07 11:34:40,128 INFO L168 Benchmark]: CACSL2BoogieTranslator took 551.64 ms. Allocated memory was 145.8 MB in the beginning and 203.9 MB in the end (delta: 58.2 MB). Free memory was 102.1 MB in the beginning and 180.2 MB in the end (delta: -78.1 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. [2020-07-07 11:34:40,130 INFO L168 Benchmark]: Boogie Preprocessor took 68.26 ms. Allocated memory is still 203.9 MB. Free memory was 180.2 MB in the beginning and 177.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-07-07 11:34:40,131 INFO L168 Benchmark]: RCFGBuilder took 822.04 ms. Allocated memory is still 203.9 MB. Free memory was 177.6 MB in the beginning and 142.4 MB in the end (delta: 35.2 MB). Peak memory consumption was 35.2 MB. Max. memory is 7.1 GB. [2020-07-07 11:34:40,131 INFO L168 Benchmark]: TraceAbstraction took 7727.76 ms. Allocated memory was 203.9 MB in the beginning and 308.8 MB in the end (delta: 104.9 MB). Free memory was 141.8 MB in the beginning and 253.8 MB in the end (delta: -112.0 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-07 11:34:40,143 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 145.8 MB. Free memory was 120.8 MB in the beginning and 120.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 551.64 ms. Allocated memory was 145.8 MB in the beginning and 203.9 MB in the end (delta: 58.2 MB). Free memory was 102.1 MB in the beginning and 180.2 MB in the end (delta: -78.1 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 68.26 ms. Allocated memory is still 203.9 MB. Free memory was 180.2 MB in the beginning and 177.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 822.04 ms. Allocated memory is still 203.9 MB. Free memory was 177.6 MB in the beginning and 142.4 MB in the end (delta: 35.2 MB). Peak memory consumption was 35.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7727.76 ms. Allocated memory was 203.9 MB in the beginning and 308.8 MB in the end (delta: 104.9 MB). Free memory was 141.8 MB in the beginning and 253.8 MB in the end (delta: -112.0 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 14]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L108] CALL, EXPR nondet_tree() [L23] COND FALSE !(__VERIFIER_nondet_bool()) [L26] struct node *n = (struct node *)malloc(sizeof(struct node)); [L27] n->data = __VERIFIER_nondet_int() [L28] CALL, EXPR nondet_tree() [L23] COND TRUE __VERIFIER_nondet_bool() [L24] return 0; VAL [\result={0:0}] [L28] RET, EXPR nondet_tree() VAL [malloc(sizeof(struct node))={-1:0}, n={-1:0}, nondet_tree()={0:0}] [L28] n->left = nondet_tree() [L29] CALL, EXPR nondet_tree() [L23] COND TRUE __VERIFIER_nondet_bool() [L24] return 0; VAL [\result={0:0}] [L29] RET, EXPR nondet_tree() VAL [malloc(sizeof(struct node))={-1:0}, n={-1:0}, nondet_tree()={0:0}] [L29] n->right = nondet_tree() [L30] return n; VAL [\result={-1:0}, malloc(sizeof(struct node))={-1:0}, n={-1:0}] [L108] RET, EXPR nondet_tree() VAL [nondet_tree()={-1:0}] [L108] CALL task(nondet_tree()) VAL [t={-1:0}] [L84] CALL, EXPR min(t) VAL [n={-1:0}] [L35] COND FALSE !(!n) [L38] EXPR n->data [L38] int a = n->data; [L39] EXPR n->left VAL [a=2147483647, n={-1:0}, n={-1:0}, n->left={0:0}] [L39] CALL, EXPR min(n->left) VAL [n={0:0}] [L35] COND TRUE !n [L36] return 2147483647; VAL [\result=2147483647, n={0:0}, n={0:0}] [L39] RET, EXPR min(n->left) VAL [a=2147483647, min(n->left)=2147483647, n={-1:0}, n={-1:0}, n->left={0:0}] [L39] int b = min(n->left); [L40] EXPR n->right VAL [a=2147483647, b=2147483647, n={-1:0}, n={-1:0}, n->right={0:0}] [L40] CALL, EXPR min(n->right) VAL [n={0:0}] [L35] COND TRUE !n [L36] return 2147483647; VAL [\result=2147483647, n={0:0}, n={0:0}] [L40] RET, EXPR min(n->right) VAL [a=2147483647, b=2147483647, min(n->right)=2147483647, n={-1:0}, n={-1:0}, n->right={0:0}] [L40] int c = min(n->right); [L41] COND TRUE b <= a && b <= c [L41] return b; VAL [\result=2147483647, a=2147483647, b=2147483647, c=2147483647, n={-1:0}, n={-1:0}] [L84] RET, EXPR min(t) VAL [min(t)=2147483647, t={-1:0}, t={-1:0}] [L84] int a = min(t); [L85] int b; VAL [a=2147483647, b={2:0}, t={-1:0}, t={-1:0}] [L87] CALL, EXPR size(t) VAL [t={-1:0}] [L79] COND FALSE !(!t) [L80] EXPR t->left VAL [t={-1:0}, t={-1:0}, t->left={0:0}] [L80] CALL, EXPR size(t->left) VAL [t={0:0}] [L79] COND TRUE !t [L79] return 0; VAL [\result=0, t={0:0}, t={0:0}] [L80] RET, EXPR size(t->left) VAL [size(t->left)=0, t={-1:0}, t={-1:0}, t->left={0:0}] [L80] EXPR t->right VAL [size(t->left)=0, t={-1:0}, t={-1:0}, t->left={0:0}, t->right={0:0}] [L80] CALL, EXPR size(t->right) VAL [t={0:0}] [L79] COND TRUE !t [L79] return 0; VAL [\result=0, t={0:0}, t={0:0}] [L80] RET, EXPR size(t->right) VAL [size(t->left)=0, size(t->right)=0, t={-1:0}, t={-1:0}, t->left={0:0}, t->right={0:0}] [L80] return size(t->left) + size(t->right) + 1; [L87] RET, EXPR size(t) VAL [a=2147483647, b={2:0}, size(t)=1, t={-1:0}, t={-1:0}] [L87] int n = size(t); [L88] CALL assume_cycle_if_not(n != 0) VAL [\old(cond)=1] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L88] RET assume_cycle_if_not(n != 0) VAL [a=2147483647, b={2:0}, n=1, t={-1:0}, t={-1:0}] [L89] EXPR, FCALL calloc(n, sizeof(int)) VAL [a=2147483647, b={2:0}, calloc(n, sizeof(int))={-2:0}, n=1, t={-1:0}, t={-1:0}] [L89] int *x = calloc(n, sizeof(int)); VAL [a=2147483647, b={2:0}, calloc(n, sizeof(int))={-2:0}, n=1, t={-1:0}, t={-1:0}, x={-2:0}] [L90] CALL tree_inorder(t, x, n) VAL [\old(i)=1, a={-2:0}, t={-1:0}] [L68] COND FALSE !(!t) [L71] EXPR t->left VAL [\old(i)=1, a={-2:0}, a={-2:0}, i=1, t={-1:0}, t={-1:0}, t->left={0:0}] [L71] CALL, EXPR tree_inorder(t->left, a, i) VAL [\old(i)=1, a={-2:0}, t={0:0}] [L68] COND TRUE !t [L69] return i; VAL [\old(i)=1, \result=1, a={-2:0}, a={-2:0}, i=1, t={0:0}, t={0:0}] [L71] RET, EXPR tree_inorder(t->left, a, i) VAL [\old(i)=1, a={-2:0}, a={-2:0}, i=1, t={-1:0}, t={-1:0}, t->left={0:0}, tree_inorder(t->left, a, i)=1] [L71] i = tree_inorder(t->left, a, i) [L72] EXPR i++ [L72] EXPR t->data [L72] a[i++] = t->data [L73] EXPR t->right VAL [\old(i)=1, a={-2:0}, a={-2:0}, i=2, t={-1:0}, t={-1:0}, t->right={0:0}] [L73] CALL, EXPR tree_inorder(t->right, a, i) VAL [\old(i)=2, a={-2:0}, t={0:0}] [L68] COND TRUE !t [L69] return i; VAL [\old(i)=2, \result=2, a={-2:0}, a={-2:0}, i=2, t={0:0}, t={0:0}] [L73] RET, EXPR tree_inorder(t->right, a, i) VAL [\old(i)=1, a={-2:0}, a={-2:0}, i=2, t={-1:0}, t={-1:0}, t->right={0:0}, tree_inorder(t->right, a, i)=2] [L73] i = tree_inorder(t->right, a, i) [L74] return i; VAL [\old(i)=1, \result=2, a={-2:0}, a={-2:0}, i=2, t={-1:0}, t={-1:0}] [L90] RET tree_inorder(t, x, n) VAL [a=2147483647, b={2:0}, calloc(n, sizeof(int))={-2:0}, n=1, t={-1:0}, t={-1:0}, tree_inorder(t, x, n)=2, x={-2:0}] [L91] EXPR x[0] VAL [a=2147483647, b={2:0}, calloc(n, sizeof(int))={-2:0}, n=1, t={-1:0}, t={-1:0}, x={-2:0}, x[0]=0] [L91] CALL __VERIFIER_assert(a == x[0]) VAL [\old(cond)=0] [L14] COND TRUE !cond VAL [\old(cond)=0, cond=0] [L14] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 12 procedures, 98 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.5s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 4.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 344 SDtfs, 662 SDslu, 1525 SDs, 0 SdLazy, 2164 SolverSat, 607 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 285 GetRequests, 200 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=98occurred 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: 0.1s AutomataMinimizationTime, 4 MinimizatonAttempts, 17 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 471 NumberOfCodeBlocks, 471 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 374 ConstructedInterpolants, 0 QuantifiedInterpolants, 73960 SizeOfPredicates, 14 NumberOfNonLiveVariables, 633 ConjunctsInSsa, 56 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 103/111 InterpolantCoveringCapability, 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...