/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_iter.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 19:50:32,201 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 19:50:32,204 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 19:50:32,230 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 19:50:32,230 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 19:50:32,232 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 19:50:32,233 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 19:50:32,235 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 19:50:32,237 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 19:50:32,238 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 19:50:32,239 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 19:50:32,240 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 19:50:32,241 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 19:50:32,242 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 19:50:32,243 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 19:50:32,244 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 19:50:32,245 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 19:50:32,246 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 19:50:32,248 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 19:50:32,250 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 19:50:32,252 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 19:50:32,253 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 19:50:32,255 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 19:50:32,256 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 19:50:32,258 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 19:50:32,267 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 19:50:32,268 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 19:50:32,269 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 19:50:32,270 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 19:50:32,280 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 19:50:32,280 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 19:50:32,282 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 19:50:32,282 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 19:50:32,283 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 19:50:32,283 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 19:50:32,283 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 19:50:32,283 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 19:50:32,283 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 19:50:32,284 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 19:50:32,284 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 19:50:32,284 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 19:50:32,284 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 19:50:32,284 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 19:50:32,285 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 19:50:32,285 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 19:50:32,285 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 19:50:32,285 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 19:50:32,286 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:50:32,286 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 19:50:32,286 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 19:50:32,286 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 19:50:32,286 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 19:50:32,617 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 19:50:32,631 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 19:50:32,635 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 19:50:32,637 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 19:50:32,637 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 19:50:32,638 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_iter.c [2020-08-22 19:50:32,724 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1209aff3b/cf1d265aa78a41c083bc716f7287c2e1/FLAGace5ae44a [2020-08-22 19:50:33,310 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 19:50:33,311 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_iter.c [2020-08-22 19:50:33,319 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1209aff3b/cf1d265aa78a41c083bc716f7287c2e1/FLAGace5ae44a [2020-08-22 19:50:33,594 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1209aff3b/cf1d265aa78a41c083bc716f7287c2e1 [2020-08-22 19:50:33,604 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 19:50:33,605 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 19:50:33,607 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 19:50:33,607 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 19:50:33,611 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 19:50:33,612 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:50:33" (1/1) ... [2020-08-22 19:50:33,616 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67e9fdee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:33, skipping insertion in model container [2020-08-22 19:50:33,616 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:50:33" (1/1) ... [2020-08-22 19:50:33,625 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 19:50:33,658 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 19:50:33,883 WARN L1484 CHandler]: Possible shadowing of function min [2020-08-22 19:50:33,901 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:50:33,920 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 19:50:34,038 WARN L1484 CHandler]: Possible shadowing of function min [2020-08-22 19:50:34,052 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:50:34,075 INFO L208 MainTranslator]: Completed translation [2020-08-22 19:50:34,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:34 WrapperNode [2020-08-22 19:50:34,076 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 19:50:34,077 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 19:50:34,077 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 19:50:34,077 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 19:50:34,088 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:34" (1/1) ... [2020-08-22 19:50:34,089 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:34" (1/1) ... [2020-08-22 19:50:34,103 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:34" (1/1) ... [2020-08-22 19:50:34,107 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:34" (1/1) ... [2020-08-22 19:50:34,139 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:34" (1/1) ... [2020-08-22 19:50:34,145 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:34" (1/1) ... [2020-08-22 19:50:34,148 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:34" (1/1) ... [2020-08-22 19:50:34,153 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 19:50:34,154 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 19:50:34,154 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 19:50:34,154 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 19:50:34,155 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:34" (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 19:50:34,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 19:50:34,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 19:50:34,230 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_cycle_if_not [2020-08-22 19:50:34,230 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 19:50:34,231 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-08-22 19:50:34,231 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2020-08-22 19:50:34,231 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2020-08-22 19:50:34,231 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2020-08-22 19:50:34,231 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2020-08-22 19:50:34,231 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2020-08-22 19:50:34,231 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 19:50:34,232 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-08-22 19:50:34,232 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-22 19:50:34,232 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 19:50:34,232 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-22 19:50:34,232 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 19:50:34,233 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-22 19:50:34,233 INFO L130 BoogieDeclarations]: Found specification of procedure assume_cycle_if_not [2020-08-22 19:50:34,233 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 19:50:34,233 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 19:50:34,233 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-08-22 19:50:34,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 19:50:34,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 19:50:34,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-22 19:50:34,234 INFO L130 BoogieDeclarations]: Found specification of procedure min [2020-08-22 19:50:34,234 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 19:50:34,234 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-22 19:50:34,234 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2020-08-22 19:50:34,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 19:50:34,235 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2020-08-22 19:50:34,235 INFO L130 BoogieDeclarations]: Found specification of procedure size [2020-08-22 19:50:34,235 INFO L130 BoogieDeclarations]: Found specification of procedure task [2020-08-22 19:50:34,235 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 19:50:34,235 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-08-22 19:50:34,236 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 19:50:34,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 19:50:34,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 19:50:34,928 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 19:50:34,928 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-22 19:50:34,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:50:34 BoogieIcfgContainer [2020-08-22 19:50:34,937 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 19:50:34,939 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 19:50:34,939 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 19:50:34,943 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 19:50:34,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 07:50:33" (1/3) ... [2020-08-22 19:50:34,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ae2d82b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:50:34, skipping insertion in model container [2020-08-22 19:50:34,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:34" (2/3) ... [2020-08-22 19:50:34,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ae2d82b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:50:34, skipping insertion in model container [2020-08-22 19:50:34,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:50:34" (3/3) ... [2020-08-22 19:50:34,948 INFO L109 eAbstractionObserver]: Analyzing ICFG tree_del_iter.c [2020-08-22 19:50:34,961 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 19:50:34,973 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 19:50:34,991 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 19:50:35,019 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 19:50:35,019 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 19:50:35,019 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 19:50:35,020 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 19:50:35,020 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 19:50:35,021 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 19:50:35,021 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 19:50:35,021 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 19:50:35,046 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states. [2020-08-22 19:50:35,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-22 19:50:35,066 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:35,067 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 19:50:35,068 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:35,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:35,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1657225032, now seen corresponding path program 1 times [2020-08-22 19:50:35,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:35,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [723841981] [2020-08-22 19:50:35,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:35,152 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:35,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:35,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:35,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:35,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 19:50:35,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:35,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-22 19:50:35,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:35,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-22 19:50:35,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:35,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-22 19:50:35,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:35,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 19:50:35,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:35,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-22 19:50:35,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:35,625 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 19:50:35,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [723841981] [2020-08-22 19:50:35,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:35,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-22 19:50:35,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916914895] [2020-08-22 19:50:35,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 19:50:35,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:35,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 19:50:35,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-08-22 19:50:35,656 INFO L87 Difference]: Start difference. First operand 206 states. Second operand 11 states. [2020-08-22 19:50:37,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:37,106 INFO L93 Difference]: Finished difference Result 366 states and 427 transitions. [2020-08-22 19:50:37,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 19:50:37,109 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 60 [2020-08-22 19:50:37,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:37,145 INFO L225 Difference]: With dead ends: 366 [2020-08-22 19:50:37,146 INFO L226 Difference]: Without dead ends: 210 [2020-08-22 19:50:37,160 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 19:50:37,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-08-22 19:50:37,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 196. [2020-08-22 19:50:37,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-08-22 19:50:37,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 220 transitions. [2020-08-22 19:50:37,259 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 220 transitions. Word has length 60 [2020-08-22 19:50:37,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:37,260 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 220 transitions. [2020-08-22 19:50:37,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 19:50:37,260 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 220 transitions. [2020-08-22 19:50:37,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-08-22 19:50:37,266 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:37,266 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 19:50:37,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 19:50:37,267 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:37,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:37,268 INFO L82 PathProgramCache]: Analyzing trace with hash -290171790, now seen corresponding path program 1 times [2020-08-22 19:50:37,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:37,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [683218635] [2020-08-22 19:50:37,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:37,272 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:37,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:37,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:37,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:37,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 19:50:37,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:37,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-22 19:50:37,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:37,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-22 19:50:37,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:37,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 19:50:37,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:37,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 19:50:37,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:37,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-22 19:50:37,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:37,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-22 19:50:37,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:37,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-22 19:50:37,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:37,665 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 19:50:37,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [683218635] [2020-08-22 19:50:37,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:37,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-22 19:50:37,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569428357] [2020-08-22 19:50:37,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 19:50:37,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:37,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 19:50:37,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-08-22 19:50:37,669 INFO L87 Difference]: Start difference. First operand 196 states and 220 transitions. Second operand 12 states. [2020-08-22 19:50:39,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:39,035 INFO L93 Difference]: Finished difference Result 354 states and 400 transitions. [2020-08-22 19:50:39,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 19:50:39,036 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 80 [2020-08-22 19:50:39,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:39,040 INFO L225 Difference]: With dead ends: 354 [2020-08-22 19:50:39,041 INFO L226 Difference]: Without dead ends: 209 [2020-08-22 19:50:39,044 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 19:50:39,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-08-22 19:50:39,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 198. [2020-08-22 19:50:39,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-08-22 19:50:39,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 223 transitions. [2020-08-22 19:50:39,111 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 223 transitions. Word has length 80 [2020-08-22 19:50:39,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:39,114 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 223 transitions. [2020-08-22 19:50:39,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 19:50:39,114 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 223 transitions. [2020-08-22 19:50:39,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-08-22 19:50:39,122 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:39,124 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 19:50:39,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 19:50:39,125 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:39,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:39,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1366806748, now seen corresponding path program 1 times [2020-08-22 19:50:39,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:39,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631054894] [2020-08-22 19:50:39,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:39,132 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:39,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:39,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:39,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:39,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 19:50:39,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:39,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 19:50:39,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:39,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-22 19:50:39,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:39,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 19:50:39,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:39,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 19:50:39,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:39,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 19:50:39,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:39,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 19:50:39,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:39,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-22 19:50:39,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:39,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 19:50:39,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:39,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-22 19:50:39,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:39,457 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 19:50:39,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631054894] [2020-08-22 19:50:39,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:39,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-22 19:50:39,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146139918] [2020-08-22 19:50:39,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 19:50:39,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:39,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 19:50:39,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-08-22 19:50:39,461 INFO L87 Difference]: Start difference. First operand 198 states and 223 transitions. Second operand 14 states. [2020-08-22 19:50:40,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:40,989 INFO L93 Difference]: Finished difference Result 353 states and 399 transitions. [2020-08-22 19:50:40,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 19:50:40,990 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 101 [2020-08-22 19:50:40,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:40,993 INFO L225 Difference]: With dead ends: 353 [2020-08-22 19:50:40,994 INFO L226 Difference]: Without dead ends: 211 [2020-08-22 19:50:40,996 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 19:50:40,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-08-22 19:50:41,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 200. [2020-08-22 19:50:41,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-08-22 19:50:41,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 226 transitions. [2020-08-22 19:50:41,030 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 226 transitions. Word has length 101 [2020-08-22 19:50:41,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:41,031 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 226 transitions. [2020-08-22 19:50:41,031 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 19:50:41,031 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 226 transitions. [2020-08-22 19:50:41,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-08-22 19:50:41,034 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:41,034 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 19:50:41,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 19:50:41,035 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:41,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:41,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1397703292, now seen corresponding path program 1 times [2020-08-22 19:50:41,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:41,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1264341921] [2020-08-22 19:50:41,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:41,039 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:41,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:41,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:41,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:41,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 19:50:41,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:41,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 19:50:41,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:41,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-22 19:50:41,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:41,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 19:50:41,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:41,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 19:50:41,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:41,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-22 19:50:41,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:41,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-22 19:50:41,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:41,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 19:50:41,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:41,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 19:50:41,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:41,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-22 19:50:41,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:41,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-22 19:50:41,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:41,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-08-22 19:50:41,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:41,335 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 19:50:41,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1264341921] [2020-08-22 19:50:41,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:41,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-22 19:50:41,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64743950] [2020-08-22 19:50:41,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 19:50:41,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:41,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 19:50:41,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-08-22 19:50:41,338 INFO L87 Difference]: Start difference. First operand 200 states and 226 transitions. Second operand 14 states. [2020-08-22 19:50:42,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:42,725 INFO L93 Difference]: Finished difference Result 336 states and 378 transitions. [2020-08-22 19:50:42,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 19:50:42,725 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 127 [2020-08-22 19:50:42,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:42,731 INFO L225 Difference]: With dead ends: 336 [2020-08-22 19:50:42,732 INFO L226 Difference]: Without dead ends: 211 [2020-08-22 19:50:42,733 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 19:50:42,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-08-22 19:50:42,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 202. [2020-08-22 19:50:42,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-08-22 19:50:42,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 230 transitions. [2020-08-22 19:50:42,773 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 230 transitions. Word has length 127 [2020-08-22 19:50:42,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:42,777 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 230 transitions. [2020-08-22 19:50:42,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 19:50:42,778 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 230 transitions. [2020-08-22 19:50:42,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-08-22 19:50:42,780 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:42,781 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 19:50:42,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 19:50:42,781 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:42,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:42,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1130815571, now seen corresponding path program 1 times [2020-08-22 19:50:42,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:42,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [992006423] [2020-08-22 19:50:42,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:42,785 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:42,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 19:50:42,845 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 19:50:42,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 19:50:42,887 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 19:50:42,938 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 19:50:42,939 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 19:50:42,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 19:50:42,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 07:50:42 BoogieIcfgContainer [2020-08-22 19:50:42,968 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 19:50:42,971 INFO L168 Benchmark]: Toolchain (without parser) took 9364.74 ms. Allocated memory was 144.2 MB in the beginning and 321.4 MB in the end (delta: 177.2 MB). Free memory was 101.0 MB in the beginning and 271.5 MB in the end (delta: -170.5 MB). Peak memory consumption was 6.7 MB. Max. memory is 7.1 GB. [2020-08-22 19:50:42,972 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 144.2 MB. Free memory was 119.8 MB in the beginning and 119.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 19:50:42,973 INFO L168 Benchmark]: CACSL2BoogieTranslator took 469.62 ms. Allocated memory was 144.2 MB in the beginning and 201.9 MB in the end (delta: 57.7 MB). Free memory was 100.8 MB in the beginning and 178.2 MB in the end (delta: -77.4 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. [2020-08-22 19:50:42,974 INFO L168 Benchmark]: Boogie Preprocessor took 76.54 ms. Allocated memory is still 201.9 MB. Free memory was 178.2 MB in the beginning and 175.4 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. [2020-08-22 19:50:42,975 INFO L168 Benchmark]: RCFGBuilder took 783.71 ms. Allocated memory is still 201.9 MB. Free memory was 175.4 MB in the beginning and 130.3 MB in the end (delta: 45.0 MB). Peak memory consumption was 45.0 MB. Max. memory is 7.1 GB. [2020-08-22 19:50:42,976 INFO L168 Benchmark]: TraceAbstraction took 8029.27 ms. Allocated memory was 201.9 MB in the beginning and 321.4 MB in the end (delta: 119.5 MB). Free memory was 129.6 MB in the beginning and 271.5 MB in the end (delta: -141.9 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-22 19:50:42,980 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 144.2 MB. Free memory was 119.8 MB in the beginning and 119.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 469.62 ms. Allocated memory was 144.2 MB in the beginning and 201.9 MB in the end (delta: 57.7 MB). Free memory was 100.8 MB in the beginning and 178.2 MB in the end (delta: -77.4 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 76.54 ms. Allocated memory is still 201.9 MB. Free memory was 178.2 MB in the beginning and 175.4 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 783.71 ms. Allocated memory is still 201.9 MB. Free memory was 175.4 MB in the beginning and 130.3 MB in the end (delta: 45.0 MB). Peak memory consumption was 45.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8029.27 ms. Allocated memory was 201.9 MB in the beginning and 321.4 MB in the end (delta: 119.5 MB). Free memory was 129.6 MB in the beginning and 271.5 MB in the end (delta: -141.9 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 14]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L108] CALL, EXPR nondet_tree() [L23] COND FALSE !(__VERIFIER_nondet_bool()) [L26] struct node *n = (struct node *)malloc(sizeof(struct node)); [L27] n->data = __VERIFIER_nondet_int() [L28] CALL, EXPR nondet_tree() [L23] COND TRUE __VERIFIER_nondet_bool() [L24] return 0; [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; [L108] RET, EXPR nondet_tree() [L108] CALL task(nondet_tree()) [L84] 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; [L84] RET, EXPR min(t) [L84] int a = min(t); [L85] int b; [L87] CALL, EXPR size(t) [L79] COND FALSE !(!t) [L80] EXPR t->left [L80] CALL, EXPR size(t->left) [L79] COND TRUE !t [L79] return 0; [L80] RET, EXPR size(t->left) [L80] EXPR t->right [L80] CALL, EXPR size(t->right) [L79] COND TRUE !t [L79] return 0; [L80] RET, EXPR size(t->right) [L80] return size(t->left) + size(t->right) + 1; [L87] RET, EXPR size(t) [L87] int n = size(t); [L88] CALL assume_cycle_if_not(n != 0) [L9] COND FALSE !(!cond) [L88] RET assume_cycle_if_not(n != 0) [L89] EXPR, FCALL calloc(n, sizeof(int)) [L89] int *x = calloc(n, sizeof(int)); [L90] CALL tree_inorder(t, x, n) [L68] COND FALSE !(!t) [L71] EXPR t->left [L71] CALL, EXPR tree_inorder(t->left, a, i) [L68] COND TRUE !t [L69] return i; [L71] RET, EXPR tree_inorder(t->left, a, i) [L71] i = tree_inorder(t->left, a, i) [L72] EXPR i++ [L72] EXPR t->data [L72] a[i++] = t->data [L73] EXPR t->right [L73] CALL, EXPR tree_inorder(t->right, a, i) [L68] COND TRUE !t [L69] return i; [L73] RET, EXPR tree_inorder(t->right, a, i) [L73] i = tree_inorder(t->right, a, i) [L74] return i; [L90] RET tree_inorder(t, x, n) [L91] EXPR x[0] [L91] CALL __VERIFIER_assert(a == x[0]) [L14] COND TRUE !cond [L14] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 12 procedures, 206 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.9s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 5.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 726 SDtfs, 1454 SDslu, 2163 SDs, 0 SdLazy, 4521 SolverSat, 495 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.4s 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=206occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 4 MinimizatonAttempts, 45 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...