/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 0.1.25-267fbe0 [2020-07-17 12:17:16,434 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 12:17:16,437 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 12:17:16,457 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 12:17:16,457 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 12:17:16,459 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 12:17:16,462 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 12:17:16,472 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 12:17:16,476 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 12:17:16,479 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 12:17:16,481 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 12:17:16,484 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 12:17:16,484 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 12:17:16,486 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 12:17:16,488 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 12:17:16,489 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 12:17:16,491 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 12:17:16,492 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 12:17:16,493 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 12:17:16,498 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 12:17:16,503 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 12:17:16,507 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 12:17:16,508 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 12:17:16,509 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 12:17:16,511 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 12:17:16,522 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 12:17:16,523 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 12:17:16,524 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 12:17:16,525 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 [2020-07-17 12:17:16,559 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 12:17:16,560 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 12:17:16,564 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-17 12:17:16,564 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-17 12:17:16,565 INFO L138 SettingsManager]: * Use SBE=true [2020-07-17 12:17:16,565 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 12:17:16,565 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 12:17:16,565 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 12:17:16,565 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 12:17:16,566 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 12:17:16,566 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 12:17:16,566 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 12:17:16,566 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 12:17:16,566 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 12:17:16,567 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 12:17:16,567 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 12:17:16,567 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 12:17:16,567 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 12:17:16,567 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-17 12:17:16,568 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 12:17:16,568 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 12:17:16,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 12:17:16,569 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 12:17:16,569 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-17 12:17:16,570 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-17 12:17:16,570 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-17 12:17:16,570 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-17 12:17:16,570 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 12:17:16,571 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-17 12:17:16,571 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-17 12:17:16,862 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 12:17:16,876 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 12:17:16,880 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 12:17:16,882 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 12:17:16,882 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 12:17:16,883 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_iter.c [2020-07-17 12:17:16,964 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5d7cd9a7/0ec216b2085d40df920cda7ce68375bd/FLAGf466c8ca7 [2020-07-17 12:17:17,457 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 12:17:17,457 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_iter.c [2020-07-17 12:17:17,467 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5d7cd9a7/0ec216b2085d40df920cda7ce68375bd/FLAGf466c8ca7 [2020-07-17 12:17:17,781 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5d7cd9a7/0ec216b2085d40df920cda7ce68375bd [2020-07-17 12:17:17,792 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 12:17:17,795 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 12:17:17,796 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 12:17:17,796 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 12:17:17,800 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 12:17:17,801 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:17:17" (1/1) ... [2020-07-17 12:17:17,805 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d430f81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:17:17, skipping insertion in model container [2020-07-17 12:17:17,805 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:17:17" (1/1) ... [2020-07-17 12:17:17,813 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 12:17:17,835 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 12:17:18,015 WARN L1484 CHandler]: Possible shadowing of function min [2020-07-17 12:17:18,030 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 12:17:18,047 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 12:17:18,071 WARN L1484 CHandler]: Possible shadowing of function min [2020-07-17 12:17:18,083 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 12:17:18,191 INFO L208 MainTranslator]: Completed translation [2020-07-17 12:17:18,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:17:18 WrapperNode [2020-07-17 12:17:18,192 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 12:17:18,193 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 12:17:18,193 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 12:17:18,193 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 12:17:18,205 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:17:18" (1/1) ... [2020-07-17 12:17:18,206 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:17:18" (1/1) ... [2020-07-17 12:17:18,218 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:17:18" (1/1) ... [2020-07-17 12:17:18,218 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:17:18" (1/1) ... [2020-07-17 12:17:18,237 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:17:18" (1/1) ... [2020-07-17 12:17:18,244 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:17:18" (1/1) ... [2020-07-17 12:17:18,247 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:17:18" (1/1) ... [2020-07-17 12:17:18,251 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 12:17:18,252 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 12:17:18,252 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 12:17:18,252 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 12:17:18,253 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:17:18" (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 [2020-07-17 12:17:18,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 12:17:18,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 12:17:18,314 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_cycle_if_not [2020-07-17 12:17:18,314 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-17 12:17:18,314 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-07-17 12:17:18,314 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2020-07-17 12:17:18,314 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2020-07-17 12:17:18,314 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2020-07-17 12:17:18,315 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2020-07-17 12:17:18,315 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2020-07-17 12:17:18,315 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 12:17:18,315 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-07-17 12:17:18,315 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-17 12:17:18,316 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-17 12:17:18,316 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-17 12:17:18,316 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 12:17:18,316 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-17 12:17:18,316 INFO L130 BoogieDeclarations]: Found specification of procedure assume_cycle_if_not [2020-07-17 12:17:18,316 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 12:17:18,317 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-17 12:17:18,317 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-07-17 12:17:18,317 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-17 12:17:18,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-17 12:17:18,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-17 12:17:18,317 INFO L130 BoogieDeclarations]: Found specification of procedure min [2020-07-17 12:17:18,318 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-17 12:17:18,318 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-17 12:17:18,318 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2020-07-17 12:17:18,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-17 12:17:18,318 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2020-07-17 12:17:18,318 INFO L130 BoogieDeclarations]: Found specification of procedure size [2020-07-17 12:17:18,318 INFO L130 BoogieDeclarations]: Found specification of procedure task [2020-07-17 12:17:18,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-17 12:17:18,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-07-17 12:17:18,319 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 12:17:18,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 12:17:18,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 12:17:18,889 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 12:17:18,889 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-17 12:17:18,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:17:18 BoogieIcfgContainer [2020-07-17 12:17:18,895 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 12:17:18,896 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 12:17:18,896 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 12:17:18,900 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 12:17:18,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 12:17:17" (1/3) ... [2020-07-17 12:17:18,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@627ec5ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:17:18, skipping insertion in model container [2020-07-17 12:17:18,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:17:18" (2/3) ... [2020-07-17 12:17:18,902 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@627ec5ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:17:18, skipping insertion in model container [2020-07-17 12:17:18,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:17:18" (3/3) ... [2020-07-17 12:17:18,904 INFO L109 eAbstractionObserver]: Analyzing ICFG tree_del_iter.c [2020-07-17 12:17:18,917 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-17 12:17:18,926 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 12:17:18,942 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 12:17:18,971 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 12:17:18,971 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 12:17:18,972 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-17 12:17:18,972 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 12:17:18,973 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 12:17:18,973 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 12:17:18,973 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 12:17:18,973 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 12:17:18,997 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states. [2020-07-17 12:17:19,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-07-17 12:17:19,008 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:17:19,010 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] [2020-07-17 12:17:19,010 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:17:19,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:17:19,018 INFO L82 PathProgramCache]: Analyzing trace with hash 806421993, now seen corresponding path program 1 times [2020-07-17 12:17:19,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:17:19,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856023206] [2020-07-17 12:17:19,029 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:17:19,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:19,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:19,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:19,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:19,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:19,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:19,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:19,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:19,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:17:19,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856023206] [2020-07-17 12:17:19,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:17:19,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-07-17 12:17:19,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933900895] [2020-07-17 12:17:19,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-17 12:17:19,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:17:19,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-17 12:17:19,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-07-17 12:17:19,555 INFO L87 Difference]: Start difference. First operand 98 states. Second operand 11 states. [2020-07-17 12:17:20,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:17:20,504 INFO L93 Difference]: Finished difference Result 174 states and 235 transitions. [2020-07-17 12:17:20,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-17 12:17:20,506 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-07-17 12:17:20,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:17:20,531 INFO L225 Difference]: With dead ends: 174 [2020-07-17 12:17:20,531 INFO L226 Difference]: Without dead ends: 98 [2020-07-17 12:17:20,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-07-17 12:17:20,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-07-17 12:17:20,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 91. [2020-07-17 12:17:20,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-07-17 12:17:20,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 115 transitions. [2020-07-17 12:17:20,601 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 115 transitions. Word has length 44 [2020-07-17 12:17:20,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:17:20,602 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 115 transitions. [2020-07-17 12:17:20,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-17 12:17:20,602 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 115 transitions. [2020-07-17 12:17:20,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-17 12:17:20,608 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:17:20,608 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] [2020-07-17 12:17:20,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 12:17:20,609 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:17:20,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:17:20,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1561052270, now seen corresponding path program 1 times [2020-07-17 12:17:20,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:17:20,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187528073] [2020-07-17 12:17:20,612 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:17:20,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:20,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:20,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:20,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:20,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:20,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:20,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:20,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:20,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:21,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:21,020 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-17 12:17:21,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187528073] [2020-07-17 12:17:21,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557564204] [2020-07-17 12:17:21,021 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 [2020-07-17 12:17:21,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:21,150 INFO L264 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-17 12:17:21,160 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:17:21,216 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-17 12:17:21,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:17:21,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 12 [2020-07-17 12:17:21,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345128871] [2020-07-17 12:17:21,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-17 12:17:21,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:17:21,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-17 12:17:21,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-07-17 12:17:21,221 INFO L87 Difference]: Start difference. First operand 91 states and 115 transitions. Second operand 12 states. [2020-07-17 12:17:22,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:17:22,092 INFO L93 Difference]: Finished difference Result 165 states and 211 transitions. [2020-07-17 12:17:22,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-17 12:17:22,099 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 56 [2020-07-17 12:17:22,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:17:22,102 INFO L225 Difference]: With dead ends: 165 [2020-07-17 12:17:22,102 INFO L226 Difference]: Without dead ends: 97 [2020-07-17 12:17:22,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-07-17 12:17:22,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-07-17 12:17:22,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 93. [2020-07-17 12:17:22,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-07-17 12:17:22,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 118 transitions. [2020-07-17 12:17:22,123 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 118 transitions. Word has length 56 [2020-07-17 12:17:22,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:17:22,124 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 118 transitions. [2020-07-17 12:17:22,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-17 12:17:22,124 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 118 transitions. [2020-07-17 12:17:22,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-07-17 12:17:22,127 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:17:22,127 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] [2020-07-17 12:17:22,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-17 12:17:22,343 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:17:22,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:17:22,345 INFO L82 PathProgramCache]: Analyzing trace with hash -217941329, now seen corresponding path program 1 times [2020-07-17 12:17:22,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:17:22,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521886489] [2020-07-17 12:17:22,346 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:17:22,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:22,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:22,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:22,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:22,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:22,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:22,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:22,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:22,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:22,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:22,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:22,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:22,646 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-17 12:17:22,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521886489] [2020-07-17 12:17:22,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:17:22,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-07-17 12:17:22,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920853438] [2020-07-17 12:17:22,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-17 12:17:22,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:17:22,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-17 12:17:22,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-07-17 12:17:22,651 INFO L87 Difference]: Start difference. First operand 93 states and 118 transitions. Second operand 13 states. [2020-07-17 12:17:23,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:17:23,410 INFO L93 Difference]: Finished difference Result 164 states and 210 transitions. [2020-07-17 12:17:23,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-17 12:17:23,412 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 66 [2020-07-17 12:17:23,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:17:23,414 INFO L225 Difference]: With dead ends: 164 [2020-07-17 12:17:23,414 INFO L226 Difference]: Without dead ends: 99 [2020-07-17 12:17:23,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-07-17 12:17:23,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-07-17 12:17:23,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2020-07-17 12:17:23,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-07-17 12:17:23,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 121 transitions. [2020-07-17 12:17:23,432 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 121 transitions. Word has length 66 [2020-07-17 12:17:23,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:17:23,433 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 121 transitions. [2020-07-17 12:17:23,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-17 12:17:23,433 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 121 transitions. [2020-07-17 12:17:23,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-17 12:17:23,436 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:17:23,436 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] [2020-07-17 12:17:23,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-17 12:17:23,437 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:17:23,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:17:23,437 INFO L82 PathProgramCache]: Analyzing trace with hash -62868055, now seen corresponding path program 1 times [2020-07-17 12:17:23,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:17:23,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174454393] [2020-07-17 12:17:23,438 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:17:23,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:23,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:23,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:23,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:23,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:23,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:23,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:23,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:23,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:23,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:23,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:23,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:23,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:23,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:23,748 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-07-17 12:17:23,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174454393] [2020-07-17 12:17:23,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631819498] [2020-07-17 12:17:23,749 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 [2020-07-17 12:17:23,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:23,856 INFO L264 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 31 conjunts are in the unsatisfiable core [2020-07-17 12:17:23,862 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:17:23,939 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-07-17 12:17:23,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:17:23,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 17 [2020-07-17 12:17:23,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999171104] [2020-07-17 12:17:23,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-17 12:17:23,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:17:23,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-17 12:17:23,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2020-07-17 12:17:23,943 INFO L87 Difference]: Start difference. First operand 95 states and 121 transitions. Second operand 17 states. [2020-07-17 12:17:24,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:17:24,954 INFO L93 Difference]: Finished difference Result 152 states and 194 transitions. [2020-07-17 12:17:24,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-17 12:17:24,955 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 79 [2020-07-17 12:17:24,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:17:24,961 INFO L225 Difference]: With dead ends: 152 [2020-07-17 12:17:24,961 INFO L226 Difference]: Without dead ends: 99 [2020-07-17 12:17:24,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2020-07-17 12:17:24,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-07-17 12:17:24,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2020-07-17 12:17:24,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-07-17 12:17:24,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 125 transitions. [2020-07-17 12:17:24,991 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 125 transitions. Word has length 79 [2020-07-17 12:17:24,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:17:24,992 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 125 transitions. [2020-07-17 12:17:24,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-17 12:17:24,992 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 125 transitions. [2020-07-17 12:17:24,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-07-17 12:17:24,999 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:17:25,001 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] [2020-07-17 12:17:25,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:17:25,206 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:17:25,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:17:25,207 INFO L82 PathProgramCache]: Analyzing trace with hash -708508396, now seen corresponding path program 1 times [2020-07-17 12:17:25,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:17:25,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141897410] [2020-07-17 12:17:25,209 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:17:25,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 12:17:25,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 12:17:25,315 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-17 12:17:25,315 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-17 12:17:25,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-17 12:17:25,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 12:17:25 BoogieIcfgContainer [2020-07-17 12:17:25,380 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 12:17:25,383 INFO L168 Benchmark]: Toolchain (without parser) took 7588.73 ms. Allocated memory was 135.3 MB in the beginning and 305.1 MB in the end (delta: 169.9 MB). Free memory was 98.2 MB in the beginning and 186.9 MB in the end (delta: -88.8 MB). Peak memory consumption was 81.1 MB. Max. memory is 7.1 GB. [2020-07-17 12:17:25,384 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 135.3 MB. Free memory was 117.1 MB in the beginning and 116.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-17 12:17:25,385 INFO L168 Benchmark]: CACSL2BoogieTranslator took 396.71 ms. Allocated memory was 135.3 MB in the beginning and 199.8 MB in the end (delta: 64.5 MB). Free memory was 97.7 MB in the beginning and 177.7 MB in the end (delta: -79.9 MB). Peak memory consumption was 25.4 MB. Max. memory is 7.1 GB. [2020-07-17 12:17:25,386 INFO L168 Benchmark]: Boogie Preprocessor took 58.62 ms. Allocated memory is still 199.8 MB. Free memory was 177.7 MB in the beginning and 174.4 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. [2020-07-17 12:17:25,386 INFO L168 Benchmark]: RCFGBuilder took 642.71 ms. Allocated memory is still 199.8 MB. Free memory was 174.4 MB in the beginning and 139.2 MB in the end (delta: 35.2 MB). Peak memory consumption was 35.2 MB. Max. memory is 7.1 GB. [2020-07-17 12:17:25,387 INFO L168 Benchmark]: TraceAbstraction took 6484.10 ms. Allocated memory was 199.8 MB in the beginning and 305.1 MB in the end (delta: 105.4 MB). Free memory was 138.5 MB in the beginning and 186.9 MB in the end (delta: -48.4 MB). Peak memory consumption was 56.9 MB. Max. memory is 7.1 GB. [2020-07-17 12:17:25,392 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 135.3 MB. Free memory was 117.1 MB in the beginning and 116.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 396.71 ms. Allocated memory was 135.3 MB in the beginning and 199.8 MB in the end (delta: 64.5 MB). Free memory was 97.7 MB in the beginning and 177.7 MB in the end (delta: -79.9 MB). Peak memory consumption was 25.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 58.62 ms. Allocated memory is still 199.8 MB. Free memory was 177.7 MB in the beginning and 174.4 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 642.71 ms. Allocated memory is still 199.8 MB. Free memory was 174.4 MB in the beginning and 139.2 MB in the end (delta: 35.2 MB). Peak memory consumption was 35.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6484.10 ms. Allocated memory was 199.8 MB in the beginning and 305.1 MB in the end (delta: 105.4 MB). Free memory was 138.5 MB in the beginning and 186.9 MB in the end (delta: -48.4 MB). Peak memory consumption was 56.9 MB. 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: 6.3s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 3.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 344 SDtfs, 658 SDslu, 1475 SDs, 0 SdLazy, 2109 SolverSat, 606 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 284 GetRequests, 200 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1.4s 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, 1.3s InterpolantComputationTime, 471 NumberOfCodeBlocks, 471 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 374 ConstructedInterpolants, 0 QuantifiedInterpolants, 72712 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...