/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/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/verifythis/tree_del_rec.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 18:56:32,475 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 18:56:32,478 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 18:56:32,502 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 18:56:32,503 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 18:56:32,504 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 18:56:32,506 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 18:56:32,507 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 18:56:32,509 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 18:56:32,510 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 18:56:32,511 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 18:56:32,512 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 18:56:32,512 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 18:56:32,513 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 18:56:32,514 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 18:56:32,516 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 18:56:32,516 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 18:56:32,517 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 18:56:32,519 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 18:56:32,521 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 18:56:32,522 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 18:56:32,523 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 18:56:32,524 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 18:56:32,525 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 18:56:32,528 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 18:56:32,535 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 18:56:32,536 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 18:56:32,537 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 18:56:32,538 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 18:56:32,547 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 18:56:32,548 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 18:56:32,549 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 18:56:32,549 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 18:56:32,549 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 18:56:32,550 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 18:56:32,550 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 18:56:32,550 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 18:56:32,550 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 18:56:32,550 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 18:56:32,551 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 18:56:32,551 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 18:56:32,551 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 18:56:32,551 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 18:56:32,551 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 18:56:32,552 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 18:56:32,552 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 18:56:32,552 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 18:56:32,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 18:56:32,552 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 18:56:32,552 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 18:56:32,553 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 18:56:32,553 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 18:56:32,869 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 18:56:32,883 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 18:56:32,886 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 18:56:32,888 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 18:56:32,889 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 18:56:32,890 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_rec.c [2020-08-22 18:56:32,957 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2ebc5095/eeab5e6d814349d18daf34799190c00e/FLAG1a5c5798f [2020-08-22 18:56:33,467 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 18:56:33,468 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_rec.c [2020-08-22 18:56:33,476 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2ebc5095/eeab5e6d814349d18daf34799190c00e/FLAG1a5c5798f [2020-08-22 18:56:33,856 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2ebc5095/eeab5e6d814349d18daf34799190c00e [2020-08-22 18:56:33,865 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 18:56:33,867 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 18:56:33,868 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 18:56:33,869 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 18:56:33,872 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 18:56:33,873 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:56:33" (1/1) ... [2020-08-22 18:56:33,877 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39f34280 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:56:33, skipping insertion in model container [2020-08-22 18:56:33,877 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:56:33" (1/1) ... [2020-08-22 18:56:33,885 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 18:56:33,911 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 18:56:34,104 WARN L1484 CHandler]: Possible shadowing of function min [2020-08-22 18:56:34,106 WARN L1484 CHandler]: Possible shadowing of function min [2020-08-22 18:56:34,135 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 18:56:34,153 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 18:56:34,294 WARN L1484 CHandler]: Possible shadowing of function min [2020-08-22 18:56:34,297 WARN L1484 CHandler]: Possible shadowing of function min [2020-08-22 18:56:34,326 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 18:56:34,351 INFO L208 MainTranslator]: Completed translation [2020-08-22 18:56:34,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:56:34 WrapperNode [2020-08-22 18:56:34,351 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 18:56:34,352 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 18:56:34,352 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 18:56:34,352 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 18:56:34,363 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:56:34" (1/1) ... [2020-08-22 18:56:34,363 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:56:34" (1/1) ... [2020-08-22 18:56:34,376 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:56:34" (1/1) ... [2020-08-22 18:56:34,377 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:56:34" (1/1) ... [2020-08-22 18:56:34,398 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:56:34" (1/1) ... [2020-08-22 18:56:34,406 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:56:34" (1/1) ... [2020-08-22 18:56:34,409 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:56:34" (1/1) ... [2020-08-22 18:56:34,413 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 18:56:34,414 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 18:56:34,414 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 18:56:34,414 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 18:56:34,415 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:56:34" (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 [2020-08-22 18:56:34,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 18:56:34,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 18:56:34,479 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_cycle_if_not [2020-08-22 18:56:34,479 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 18:56:34,479 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-08-22 18:56:34,479 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2020-08-22 18:56:34,479 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2020-08-22 18:56:34,480 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2020-08-22 18:56:34,480 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2020-08-22 18:56:34,480 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2020-08-22 18:56:34,480 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 18:56:34,480 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-08-22 18:56:34,480 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-22 18:56:34,480 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 18:56:34,481 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-22 18:56:34,481 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 18:56:34,481 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-22 18:56:34,481 INFO L130 BoogieDeclarations]: Found specification of procedure assume_cycle_if_not [2020-08-22 18:56:34,481 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 18:56:34,482 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 18:56:34,482 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-08-22 18:56:34,482 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 18:56:34,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 18:56:34,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-22 18:56:34,482 INFO L130 BoogieDeclarations]: Found specification of procedure min [2020-08-22 18:56:34,483 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 18:56:34,483 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-22 18:56:34,483 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2020-08-22 18:56:34,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 18:56:34,483 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2020-08-22 18:56:34,483 INFO L130 BoogieDeclarations]: Found specification of procedure size [2020-08-22 18:56:34,484 INFO L130 BoogieDeclarations]: Found specification of procedure task [2020-08-22 18:56:34,484 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 18:56:34,484 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-08-22 18:56:34,484 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 18:56:34,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 18:56:34,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 18:56:35,128 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 18:56:35,128 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-22 18:56:35,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:56:35 BoogieIcfgContainer [2020-08-22 18:56:35,136 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 18:56:35,138 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 18:56:35,138 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 18:56:35,141 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 18:56:35,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 06:56:33" (1/3) ... [2020-08-22 18:56:35,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cf14cde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:56:35, skipping insertion in model container [2020-08-22 18:56:35,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:56:34" (2/3) ... [2020-08-22 18:56:35,144 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cf14cde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:56:35, skipping insertion in model container [2020-08-22 18:56:35,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:56:35" (3/3) ... [2020-08-22 18:56:35,146 INFO L109 eAbstractionObserver]: Analyzing ICFG tree_del_rec.c [2020-08-22 18:56:35,158 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 18:56:35,169 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 18:56:35,185 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 18:56:35,212 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 18:56:35,212 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 18:56:35,213 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 18:56:35,213 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 18:56:35,213 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 18:56:35,214 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 18:56:35,214 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 18:56:35,214 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 18:56:35,237 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states. [2020-08-22 18:56:35,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-22 18:56:35,256 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:56:35,257 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:56:35,258 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:56:35,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:56:35,266 INFO L82 PathProgramCache]: Analyzing trace with hash -2147081424, now seen corresponding path program 1 times [2020-08-22 18:56:35,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:56:35,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527056814] [2020-08-22 18:56:35,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:56:35,342 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:56:35,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:56:35,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:56:35,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:56:35,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 18:56:35,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:56:35,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-22 18:56:35,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:56:35,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-22 18:56:35,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:56:35,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-22 18:56:35,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:56:35,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 18:56:35,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:56:35,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-22 18:56:35,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:56:35,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 18:56:35,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527056814] [2020-08-22 18:56:35,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:56:35,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-22 18:56:35,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296674378] [2020-08-22 18:56:35,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 18:56:35,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:56:35,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 18:56:35,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-08-22 18:56:35,830 INFO L87 Difference]: Start difference. First operand 190 states. Second operand 11 states. [2020-08-22 18:56:37,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:56:37,257 INFO L93 Difference]: Finished difference Result 333 states and 391 transitions. [2020-08-22 18:56:37,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 18:56:37,262 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 60 [2020-08-22 18:56:37,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:56:37,297 INFO L225 Difference]: With dead ends: 333 [2020-08-22 18:56:37,297 INFO L226 Difference]: Without dead ends: 193 [2020-08-22 18:56:37,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-08-22 18:56:37,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-08-22 18:56:37,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 180. [2020-08-22 18:56:37,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-08-22 18:56:37,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 204 transitions. [2020-08-22 18:56:37,425 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 204 transitions. Word has length 60 [2020-08-22 18:56:37,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:56:37,426 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 204 transitions. [2020-08-22 18:56:37,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 18:56:37,426 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 204 transitions. [2020-08-22 18:56:37,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-08-22 18:56:37,432 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:56:37,432 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:56:37,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 18:56:37,433 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:56:37,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:56:37,434 INFO L82 PathProgramCache]: Analyzing trace with hash 394479658, now seen corresponding path program 1 times [2020-08-22 18:56:37,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:56:37,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1215096050] [2020-08-22 18:56:37,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:56:37,438 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:56:37,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:56:37,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:56:37,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:56:37,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 18:56:37,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:56:37,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-22 18:56:37,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:56:37,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-22 18:56:37,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:56:37,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:56:37,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:56:37,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 18:56:37,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:56:37,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-22 18:56:37,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:56:37,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-22 18:56:37,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:56:37,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-22 18:56:37,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:56:37,776 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-22 18:56:37,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1215096050] [2020-08-22 18:56:37,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:56:37,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-22 18:56:37,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787555741] [2020-08-22 18:56:37,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 18:56:37,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:56:37,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 18:56:37,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-08-22 18:56:37,780 INFO L87 Difference]: Start difference. First operand 180 states and 204 transitions. Second operand 12 states. [2020-08-22 18:56:39,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:56:39,030 INFO L93 Difference]: Finished difference Result 321 states and 367 transitions. [2020-08-22 18:56:39,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 18:56:39,037 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 80 [2020-08-22 18:56:39,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:56:39,041 INFO L225 Difference]: With dead ends: 321 [2020-08-22 18:56:39,041 INFO L226 Difference]: Without dead ends: 192 [2020-08-22 18:56:39,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-08-22 18:56:39,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-08-22 18:56:39,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 182. [2020-08-22 18:56:39,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-08-22 18:56:39,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 207 transitions. [2020-08-22 18:56:39,088 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 207 transitions. Word has length 80 [2020-08-22 18:56:39,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:56:39,088 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 207 transitions. [2020-08-22 18:56:39,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 18:56:39,088 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 207 transitions. [2020-08-22 18:56:39,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-08-22 18:56:39,093 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:56:39,094 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:56:39,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 18:56:39,094 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:56:39,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:56:39,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1011523, now seen corresponding path program 1 times [2020-08-22 18:56:39,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:56:39,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504290397] [2020-08-22 18:56:39,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:56:39,098 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:56:39,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:56:39,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:56:39,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:56:39,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 18:56:39,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:56:39,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 18:56:39,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:56:39,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-22 18:56:39,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:56:39,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:56:39,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:56:39,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 18:56:39,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:56:39,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:56:39,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:56:39,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 18:56:39,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:56:39,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-22 18:56:39,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:56:39,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 18:56:39,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:56:39,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-22 18:56:39,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:56:39,460 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-22 18:56:39,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504290397] [2020-08-22 18:56:39,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:56:39,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-22 18:56:39,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299381198] [2020-08-22 18:56:39,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 18:56:39,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:56:39,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 18:56:39,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-08-22 18:56:39,464 INFO L87 Difference]: Start difference. First operand 182 states and 207 transitions. Second operand 14 states. [2020-08-22 18:56:40,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:56:40,722 INFO L93 Difference]: Finished difference Result 320 states and 366 transitions. [2020-08-22 18:56:40,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 18:56:40,723 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 101 [2020-08-22 18:56:40,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:56:40,728 INFO L225 Difference]: With dead ends: 320 [2020-08-22 18:56:40,729 INFO L226 Difference]: Without dead ends: 194 [2020-08-22 18:56:40,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2020-08-22 18:56:40,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-08-22 18:56:40,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 184. [2020-08-22 18:56:40,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-08-22 18:56:40,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 210 transitions. [2020-08-22 18:56:40,796 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 210 transitions. Word has length 101 [2020-08-22 18:56:40,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:56:40,797 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 210 transitions. [2020-08-22 18:56:40,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 18:56:40,797 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 210 transitions. [2020-08-22 18:56:40,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-08-22 18:56:40,810 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:56:40,814 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:56:40,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 18:56:40,815 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:56:40,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:56:40,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1431902021, now seen corresponding path program 1 times [2020-08-22 18:56:40,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:56:40,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [267324491] [2020-08-22 18:56:40,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:56:40,819 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:56:40,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:56:40,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:56:40,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:56:40,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 18:56:40,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:56:41,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 18:56:41,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:56:41,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-22 18:56:41,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:56:41,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:56:41,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:56:41,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 18:56:41,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:56:41,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-22 18:56:41,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:56:41,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-22 18:56:41,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:56:41,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:56:41,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:56:41,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 18:56:41,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:56:41,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-22 18:56:41,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:56:41,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-22 18:56:41,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:56:41,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-08-22 18:56:41,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:56:41,170 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-08-22 18:56:41,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [267324491] [2020-08-22 18:56:41,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:56:41,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-22 18:56:41,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309015121] [2020-08-22 18:56:41,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 18:56:41,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:56:41,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 18:56:41,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-08-22 18:56:41,173 INFO L87 Difference]: Start difference. First operand 184 states and 210 transitions. Second operand 14 states. [2020-08-22 18:56:42,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:56:42,463 INFO L93 Difference]: Finished difference Result 303 states and 345 transitions. [2020-08-22 18:56:42,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 18:56:42,464 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 127 [2020-08-22 18:56:42,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:56:42,469 INFO L225 Difference]: With dead ends: 303 [2020-08-22 18:56:42,469 INFO L226 Difference]: Without dead ends: 194 [2020-08-22 18:56:42,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2020-08-22 18:56:42,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-08-22 18:56:42,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 186. [2020-08-22 18:56:42,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-08-22 18:56:42,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 213 transitions. [2020-08-22 18:56:42,510 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 213 transitions. Word has length 127 [2020-08-22 18:56:42,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:56:42,511 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 213 transitions. [2020-08-22 18:56:42,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 18:56:42,511 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 213 transitions. [2020-08-22 18:56:42,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-08-22 18:56:42,514 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:56:42,515 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:56:42,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 18:56:42,515 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:56:42,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:56:42,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1422485650, now seen corresponding path program 1 times [2020-08-22 18:56:42,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:56:42,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358492774] [2020-08-22 18:56:42,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:56:42,519 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:56:42,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 18:56:42,559 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 18:56:42,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 18:56:42,597 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 18:56:42,648 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 18:56:42,648 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 18:56:42,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 18:56:42,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 06:56:42 BoogieIcfgContainer [2020-08-22 18:56:42,676 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 18:56:42,679 INFO L168 Benchmark]: Toolchain (without parser) took 8810.76 ms. Allocated memory was 138.4 MB in the beginning and 304.6 MB in the end (delta: 166.2 MB). Free memory was 100.7 MB in the beginning and 248.1 MB in the end (delta: -147.4 MB). Peak memory consumption was 18.8 MB. Max. memory is 7.1 GB. [2020-08-22 18:56:42,680 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 138.4 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 18:56:42,681 INFO L168 Benchmark]: CACSL2BoogieTranslator took 483.26 ms. Allocated memory was 138.4 MB in the beginning and 203.4 MB in the end (delta: 65.0 MB). Free memory was 100.4 MB in the beginning and 179.1 MB in the end (delta: -78.6 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. [2020-08-22 18:56:42,682 INFO L168 Benchmark]: Boogie Preprocessor took 61.65 ms. Allocated memory is still 203.4 MB. Free memory was 179.1 MB in the beginning and 176.4 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-08-22 18:56:42,683 INFO L168 Benchmark]: RCFGBuilder took 722.46 ms. Allocated memory is still 203.4 MB. Free memory was 176.4 MB in the beginning and 135.4 MB in the end (delta: 41.0 MB). Peak memory consumption was 41.0 MB. Max. memory is 7.1 GB. [2020-08-22 18:56:42,684 INFO L168 Benchmark]: TraceAbstraction took 7538.19 ms. Allocated memory was 203.4 MB in the beginning and 304.6 MB in the end (delta: 101.2 MB). Free memory was 134.8 MB in the beginning and 248.1 MB in the end (delta: -113.3 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-22 18:56:42,687 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 138.4 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 483.26 ms. Allocated memory was 138.4 MB in the beginning and 203.4 MB in the end (delta: 65.0 MB). Free memory was 100.4 MB in the beginning and 179.1 MB in the end (delta: -78.6 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 61.65 ms. Allocated memory is still 203.4 MB. Free memory was 179.1 MB in the beginning and 176.4 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 722.46 ms. Allocated memory is still 203.4 MB. Free memory was 176.4 MB in the beginning and 135.4 MB in the end (delta: 41.0 MB). Peak memory consumption was 41.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7538.19 ms. Allocated memory was 203.4 MB in the beginning and 304.6 MB in the end (delta: 101.2 MB). Free memory was 134.8 MB in the beginning and 248.1 MB in the end (delta: -113.3 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: [L100] 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; [L28] RET, EXPR nondet_tree() [L28] n->left = nondet_tree() [L29] CALL, EXPR nondet_tree() [L23] COND TRUE __VERIFIER_nondet_bool() [L24] return 0; [L29] RET, EXPR nondet_tree() [L29] n->right = nondet_tree() [L30] return n; [L100] RET, EXPR nondet_tree() [L100] CALL task(nondet_tree()) [L76] CALL, EXPR min(t) [L35] COND FALSE !(!n) [L38] EXPR n->data [L38] int a = n->data; [L39] EXPR n->left [L39] CALL, EXPR min(n->left) [L35] COND TRUE !n [L36] return 2147483647; [L39] RET, EXPR min(n->left) [L39] int b = min(n->left); [L40] EXPR n->right [L40] CALL, EXPR min(n->right) [L35] COND TRUE !n [L36] return 2147483647; [L40] RET, EXPR min(n->right) [L40] int c = min(n->right); [L41] COND TRUE b <= a && b <= c [L41] return b; [L76] RET, EXPR min(t) [L76] int a = min(t); [L77] int b; [L79] CALL, EXPR size(t) [L71] COND FALSE !(!t) [L72] EXPR t->left [L72] CALL, EXPR size(t->left) [L71] COND TRUE !t [L71] return 0; [L72] RET, EXPR size(t->left) [L72] EXPR t->right [L72] CALL, EXPR size(t->right) [L71] COND TRUE !t [L71] return 0; [L72] RET, EXPR size(t->right) [L72] return size(t->left) + size(t->right) + 1; [L79] RET, EXPR size(t) [L79] int n = size(t); [L80] CALL assume_cycle_if_not(n != 0) [L9] COND FALSE !(!cond) [L80] RET assume_cycle_if_not(n != 0) [L81] EXPR, FCALL calloc(n, sizeof(int)) [L81] int *x = calloc(n, sizeof(int)); [L82] CALL tree_inorder(t, x, n) [L60] COND FALSE !(!t) [L63] EXPR t->left [L63] CALL, EXPR tree_inorder(t->left, a, i) [L60] COND TRUE !t [L61] return i; [L63] RET, EXPR tree_inorder(t->left, a, i) [L63] i = tree_inorder(t->left, a, i) [L64] EXPR i++ [L64] EXPR t->data [L64] a[i++] = t->data [L65] EXPR t->right [L65] CALL, EXPR tree_inorder(t->right, a, i) [L60] COND TRUE !t [L61] return i; [L65] RET, EXPR tree_inorder(t->right, a, i) [L65] i = tree_inorder(t->right, a, i) [L66] return i; [L82] RET tree_inorder(t, x, n) [L83] EXPR x[0] [L83] CALL __VERIFIER_assert(a == x[0]) [L14] COND TRUE !cond [L14] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 12 procedures, 190 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.4s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 5.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 686 SDtfs, 1400 SDslu, 2282 SDs, 0 SdLazy, 3917 SolverSat, 554 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 156 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=190occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 4 MinimizatonAttempts, 41 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...