/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_max_incorrect.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 13:19:37,534 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 13:19:37,537 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 13:19:37,559 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 13:19:37,559 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 13:19:37,561 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 13:19:37,563 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 13:19:37,574 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 13:19:37,578 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 13:19:37,581 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 13:19:37,583 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 13:19:37,585 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 13:19:37,586 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 13:19:37,588 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 13:19:37,590 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 13:19:37,592 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 13:19:37,593 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 13:19:37,594 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 13:19:37,595 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 13:19:37,599 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 13:19:37,601 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 13:19:37,608 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 13:19:37,609 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 13:19:37,610 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 13:19:37,612 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-07 13:19:37,613 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-07 13:19:37,613 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-07 13:19:37,616 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-07 13:19:37,617 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-07 13:19:37,618 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-07 13:19:37,618 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-07 13:19:37,619 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-07 13:19:37,620 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-07 13:19:37,621 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-07 13:19:37,623 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-07 13:19:37,623 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-07 13:19:37,624 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-07 13:19:37,624 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-07 13:19:37,624 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 13:19:37,625 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 13:19:37,626 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 13:19:37,628 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-07 13:19:37,653 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 13:19:37,653 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 13:19:37,655 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 13:19:37,656 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 13:19:37,656 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 13:19:37,656 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 13:19:37,656 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 13:19:37,657 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 13:19:37,657 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 13:19:37,657 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 13:19:37,658 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 13:19:37,658 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 13:19:37,658 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 13:19:37,659 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 13:19:37,659 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 13:19:37,659 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-07 13:19:37,660 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 13:19:37,660 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 13:19:37,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 13:19:37,660 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 13:19:37,660 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-07 13:19:37,660 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 13:19:37,661 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-07 13:19:38,012 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 13:19:38,031 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 13:19:38,035 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 13:19:38,037 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 13:19:38,037 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 13:19:38,038 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_max_incorrect.c [2020-07-07 13:19:38,107 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3346fe4f2/4439710cb5f4417a95ce173bb8add605/FLAG951deeba6 [2020-07-07 13:19:38,576 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 13:19:38,577 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_max_incorrect.c [2020-07-07 13:19:38,584 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3346fe4f2/4439710cb5f4417a95ce173bb8add605/FLAG951deeba6 [2020-07-07 13:19:38,990 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3346fe4f2/4439710cb5f4417a95ce173bb8add605 [2020-07-07 13:19:38,999 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 13:19:39,001 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 13:19:39,006 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 13:19:39,006 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 13:19:39,010 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 13:19:39,011 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:19:38" (1/1) ... [2020-07-07 13:19:39,014 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e3eb0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:19:39, skipping insertion in model container [2020-07-07 13:19:39,014 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:19:38" (1/1) ... [2020-07-07 13:19:39,023 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 13:19:39,042 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 13:19:39,221 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:19:39,233 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 13:19:39,255 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:19:39,272 INFO L208 MainTranslator]: Completed translation [2020-07-07 13:19:39,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:19:39 WrapperNode [2020-07-07 13:19:39,273 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 13:19:39,273 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 13:19:39,273 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 13:19:39,273 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 13:19:39,383 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:19:39" (1/1) ... [2020-07-07 13:19:39,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:19:39" (1/1) ... [2020-07-07 13:19:39,393 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:19:39" (1/1) ... [2020-07-07 13:19:39,394 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:19:39" (1/1) ... [2020-07-07 13:19:39,404 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:19:39" (1/1) ... [2020-07-07 13:19:39,407 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:19:39" (1/1) ... [2020-07-07 13:19:39,409 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:19:39" (1/1) ... [2020-07-07 13:19:39,412 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 13:19:39,412 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 13:19:39,413 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 13:19:39,413 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 13:19:39,414 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:19:39" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 13:19:39,471 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 13:19:39,471 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 13:19:39,471 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-07 13:19:39,472 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-07-07 13:19:39,472 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2020-07-07 13:19:39,472 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-07-07 13:19:39,472 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2020-07-07 13:19:39,472 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 13:19:39,472 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-07 13:19:39,472 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-07 13:19:39,472 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 13:19:39,472 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-07 13:19:39,473 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 13:19:39,473 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-07 13:19:39,473 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-07-07 13:19:39,473 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-07 13:19:39,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-07 13:19:39,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-07 13:19:39,474 INFO L130 BoogieDeclarations]: Found specification of procedure max [2020-07-07 13:19:39,474 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-07 13:19:39,474 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-07 13:19:39,474 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-07 13:19:39,474 INFO L130 BoogieDeclarations]: Found specification of procedure task [2020-07-07 13:19:39,475 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 13:19:39,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 13:19:39,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 13:19:39,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-07 13:19:39,834 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 13:19:39,834 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-07 13:19:39,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:19:39 BoogieIcfgContainer [2020-07-07 13:19:39,840 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 13:19:39,842 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 13:19:39,842 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 13:19:39,845 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 13:19:39,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 01:19:38" (1/3) ... [2020-07-07 13:19:39,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@433a8e93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:19:39, skipping insertion in model container [2020-07-07 13:19:39,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:19:39" (2/3) ... [2020-07-07 13:19:39,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@433a8e93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:19:39, skipping insertion in model container [2020-07-07 13:19:39,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:19:39" (3/3) ... [2020-07-07 13:19:39,853 INFO L109 eAbstractionObserver]: Analyzing ICFG tree_max_incorrect.c [2020-07-07 13:19:39,865 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-07 13:19:39,874 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 13:19:39,890 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 13:19:39,915 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 13:19:39,916 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 13:19:39,916 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-07 13:19:39,916 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 13:19:39,917 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 13:19:39,917 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 13:19:39,917 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 13:19:39,917 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 13:19:39,938 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states. [2020-07-07 13:19:39,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-07 13:19:39,952 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:19:39,953 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] [2020-07-07 13:19:39,953 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:19:39,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:19:39,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1509507830, now seen corresponding path program 1 times [2020-07-07 13:19:39,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:19:39,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [325386779] [2020-07-07 13:19:39,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:19:40,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:19:40,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:19:40,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:19:40,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:19:40,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:19:40,462 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:19:40,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [325386779] [2020-07-07 13:19:40,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:19:40,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-07-07 13:19:40,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66116684] [2020-07-07 13:19:40,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-07 13:19:40,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:19:40,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-07 13:19:40,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-07-07 13:19:40,503 INFO L87 Difference]: Start difference. First operand 83 states. Second operand 10 states. [2020-07-07 13:19:41,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:19:41,522 INFO L93 Difference]: Finished difference Result 134 states and 160 transitions. [2020-07-07 13:19:41,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-07 13:19:41,524 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-07-07 13:19:41,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:19:41,538 INFO L225 Difference]: With dead ends: 134 [2020-07-07 13:19:41,539 INFO L226 Difference]: Without dead ends: 74 [2020-07-07 13:19:41,544 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-07-07 13:19:41,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-07-07 13:19:41,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-07-07 13:19:41,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-07-07 13:19:41,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2020-07-07 13:19:41,664 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 33 [2020-07-07 13:19:41,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:19:41,664 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2020-07-07 13:19:41,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-07 13:19:41,665 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2020-07-07 13:19:41,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-07 13:19:41,679 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:19:41,679 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:19:41,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 13:19:41,684 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:19:41,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:19:41,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1181568947, now seen corresponding path program 1 times [2020-07-07 13:19:41,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:19:41,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1141334166] [2020-07-07 13:19:41,689 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:19:41,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:19:41,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:19:41,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:19:41,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:19:41,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:19:41,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:19:42,039 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-07 13:19:42,040 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:19:42,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1141334166] [2020-07-07 13:19:42,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:19:42,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-07-07 13:19:42,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460218762] [2020-07-07 13:19:42,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-07 13:19:42,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:19:42,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-07 13:19:42,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-07-07 13:19:42,044 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand 12 states. [2020-07-07 13:19:42,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:19:42,714 INFO L93 Difference]: Finished difference Result 99 states and 111 transitions. [2020-07-07 13:19:42,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-07 13:19:42,715 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 54 [2020-07-07 13:19:42,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:19:42,718 INFO L225 Difference]: With dead ends: 99 [2020-07-07 13:19:42,718 INFO L226 Difference]: Without dead ends: 76 [2020-07-07 13:19:42,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2020-07-07 13:19:42,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-07-07 13:19:42,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-07-07 13:19:42,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-07 13:19:42,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2020-07-07 13:19:42,739 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 54 [2020-07-07 13:19:42,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:19:42,740 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2020-07-07 13:19:42,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-07 13:19:42,740 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2020-07-07 13:19:42,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-07-07 13:19:42,743 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:19:42,744 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] [2020-07-07 13:19:42,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 13:19:42,744 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:19:42,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:19:42,745 INFO L82 PathProgramCache]: Analyzing trace with hash 2103557100, now seen corresponding path program 1 times [2020-07-07 13:19:42,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:19:42,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1564565032] [2020-07-07 13:19:42,746 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:19:42,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 13:19:42,755 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.generateMetaTrace(AcceleratedInterpolation.java:442) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.acceleratedInterpolationCore(AcceleratedInterpolation.java:277) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:184) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:144) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:242) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:508) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:370) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-07-07 13:19:42,761 INFO L168 Benchmark]: Toolchain (without parser) took 3759.56 ms. Allocated memory was 143.1 MB in the beginning and 251.7 MB in the end (delta: 108.5 MB). Free memory was 100.5 MB in the beginning and 150.2 MB in the end (delta: -49.7 MB). Peak memory consumption was 58.8 MB. Max. memory is 7.1 GB. [2020-07-07 13:19:42,763 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 143.1 MB. Free memory was 119.8 MB in the beginning and 119.6 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-07 13:19:42,764 INFO L168 Benchmark]: CACSL2BoogieTranslator took 267.25 ms. Allocated memory is still 143.1 MB. Free memory was 100.0 MB in the beginning and 89.7 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-07-07 13:19:42,765 INFO L168 Benchmark]: Boogie Preprocessor took 138.80 ms. Allocated memory was 143.1 MB in the beginning and 200.8 MB in the end (delta: 57.7 MB). Free memory was 89.7 MB in the beginning and 177.7 MB in the end (delta: -88.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-07 13:19:42,766 INFO L168 Benchmark]: RCFGBuilder took 427.83 ms. Allocated memory is still 200.8 MB. Free memory was 177.7 MB in the beginning and 155.1 MB in the end (delta: 22.5 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. [2020-07-07 13:19:42,767 INFO L168 Benchmark]: TraceAbstraction took 2917.11 ms. Allocated memory was 200.8 MB in the beginning and 251.7 MB in the end (delta: 50.9 MB). Free memory was 154.4 MB in the beginning and 150.2 MB in the end (delta: 4.3 MB). Peak memory consumption was 55.1 MB. Max. memory is 7.1 GB. [2020-07-07 13:19:42,772 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 143.1 MB. Free memory was 119.8 MB in the beginning and 119.6 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 267.25 ms. Allocated memory is still 143.1 MB. Free memory was 100.0 MB in the beginning and 89.7 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 138.80 ms. Allocated memory was 143.1 MB in the beginning and 200.8 MB in the end (delta: 57.7 MB). Free memory was 89.7 MB in the beginning and 177.7 MB in the end (delta: -88.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 427.83 ms. Allocated memory is still 200.8 MB. Free memory was 177.7 MB in the beginning and 155.1 MB in the end (delta: 22.5 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2917.11 ms. Allocated memory was 200.8 MB in the beginning and 251.7 MB in the end (delta: 50.9 MB). Free memory was 154.4 MB in the beginning and 150.2 MB in the end (delta: 4.3 MB). Peak memory consumption was 55.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.generateMetaTrace(AcceleratedInterpolation.java:442) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...