/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/sumt8.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-22 02:24:44,389 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 02:24:44,392 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 02:24:44,428 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-22 02:24:44,441 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-22 02:24:44,442 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-22 02:24:44,443 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-22 02:24:44,445 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-22 02:24:44,446 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-22 02:24:44,447 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-22 02:24:44,449 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-22 02:24:44,452 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-22 02:24:44,454 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-22 02:24:44,458 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-22 02:24:44,460 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-22 02:24:44,461 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-22 02:24:44,472 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-22 02:24:44,510 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-22 02:24:44,511 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-22 02:24:44,513 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-22 02:24:44,515 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-22 02:24:44,543 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 02:24:44,543 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 02:24:44,546 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 02:24:44,546 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 02:24:44,546 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 02:24:44,546 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 02:24:44,547 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 02:24:44,547 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 02:24:44,549 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 02:24:44,549 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 02:24:44,550 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 02:24:44,550 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 02:24:44,550 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 02:24:44,551 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 02:24:44,551 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 02:24:44,551 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 02:24:44,551 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 02:24:44,551 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 02:24:44,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 02:24:44,552 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 02:24:44,552 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 02:24:44,552 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 02:24:44,552 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 02:24:44,553 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 02:24:44,995 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 02:24:45,025 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 02:24:45,028 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 02:24:45,030 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 02:24:45,035 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 02:24:45,037 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt8.c [2021-02-22 02:24:45,136 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bba2036ce/c66aaf630f714750a5b1e030b39dcfd1/FLAG2cc55c43a [2021-02-22 02:24:45,856 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 02:24:45,857 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt8.c [2021-02-22 02:24:45,869 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bba2036ce/c66aaf630f714750a5b1e030b39dcfd1/FLAG2cc55c43a [2021-02-22 02:24:46,224 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bba2036ce/c66aaf630f714750a5b1e030b39dcfd1 [2021-02-22 02:24:46,229 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 02:24:46,247 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 02:24:46,249 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 02:24:46,249 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 02:24:46,253 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 02:24:46,254 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:24:46" (1/1) ... [2021-02-22 02:24:46,256 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@525a8bc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:24:46, skipping insertion in model container [2021-02-22 02:24:46,256 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:24:46" (1/1) ... [2021-02-22 02:24:46,265 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 02:24:46,281 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 02:24:46,494 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt8.c[403,416] [2021-02-22 02:24:46,515 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:24:46,525 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 02:24:46,540 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt8.c[403,416] [2021-02-22 02:24:46,557 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:24:46,580 INFO L208 MainTranslator]: Completed translation [2021-02-22 02:24:46,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:24:46 WrapperNode [2021-02-22 02:24:46,580 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 02:24:46,582 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 02:24:46,582 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 02:24:46,582 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 02:24:46,595 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:24:46" (1/1) ... [2021-02-22 02:24:46,596 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:24:46" (1/1) ... [2021-02-22 02:24:46,603 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:24:46" (1/1) ... [2021-02-22 02:24:46,604 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:24:46" (1/1) ... [2021-02-22 02:24:46,611 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:24:46" (1/1) ... [2021-02-22 02:24:46,616 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:24:46" (1/1) ... [2021-02-22 02:24:46,618 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:24:46" (1/1) ... [2021-02-22 02:24:46,620 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 02:24:46,621 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 02:24:46,621 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 02:24:46,622 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 02:24:46,623 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:24:46" (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 [2021-02-22 02:24:46,720 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 02:24:46,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 02:24:46,721 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 02:24:46,721 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-22 02:24:46,721 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-22 02:24:46,721 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 02:24:46,722 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 02:24:46,722 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 02:24:46,722 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 02:24:46,722 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 02:24:46,722 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-22 02:24:46,723 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-22 02:24:46,723 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-22 02:24:46,723 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 02:24:46,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 02:24:46,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 02:24:46,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 02:24:46,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 02:24:46,724 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 02:24:46,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 02:24:47,175 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 02:24:47,178 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-22 02:24:47,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:24:47 BoogieIcfgContainer [2021-02-22 02:24:47,186 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 02:24:47,192 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 02:24:47,194 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 02:24:47,203 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 02:24:47,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 02:24:46" (1/3) ... [2021-02-22 02:24:47,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4344dbf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:24:47, skipping insertion in model container [2021-02-22 02:24:47,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:24:46" (2/3) ... [2021-02-22 02:24:47,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4344dbf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:24:47, skipping insertion in model container [2021-02-22 02:24:47,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:24:47" (3/3) ... [2021-02-22 02:24:47,210 INFO L111 eAbstractionObserver]: Analyzing ICFG sumt8.c [2021-02-22 02:24:47,239 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 02:24:47,249 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 02:24:47,280 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 02:24:47,307 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 02:24:47,307 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 02:24:47,308 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 02:24:47,308 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 02:24:47,308 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 02:24:47,308 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 02:24:47,308 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 02:24:47,308 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 02:24:47,327 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states. [2021-02-22 02:24:47,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-22 02:24:47,337 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:24:47,338 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] [2021-02-22 02:24:47,339 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:24:47,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:24:47,346 INFO L82 PathProgramCache]: Analyzing trace with hash 948591750, now seen corresponding path program 1 times [2021-02-22 02:24:47,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:24:47,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [752684452] [2021-02-22 02:24:47,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:24:47,448 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:24:47,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:24:47,787 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:24:47,790 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:24:47,791 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:24:47,793 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:24:47,825 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:24:47,826 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:24:47,837 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:24:47,839 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-22 02:24:47,853 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:24:47,854 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:24:47,871 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:24:47,872 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-22 02:24:47,894 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:24:47,896 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-22 02:24:47,921 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:24:47,923 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-22 02:24:47,949 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:24:47,951 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-22 02:24:47,981 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:24:47,983 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-02-22 02:24:48,019 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:24:48,021 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-22 02:24:48,073 WARN L141 QuantifierPusher]: treesize reduction 34, result has 83.1 percent of original size [2021-02-22 02:24:48,080 WARN L147 QuantifierPusher]: treesize reduction 34, result has 83.1 percent of original size 167 [2021-02-22 02:24:48,209 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:24:48,210 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:24:48,221 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:24:48,222 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:24:48,248 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:24:48,249 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:24:48,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:24:48,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:24:48,313 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:24:48,313 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:24:48,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:24:48,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [752684452] [2021-02-22 02:24:48,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:24:48,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-02-22 02:24:48,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498167953] [2021-02-22 02:24:48,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-22 02:24:48,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:24:48,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-22 02:24:48,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-02-22 02:24:48,363 INFO L87 Difference]: Start difference. First operand 58 states. Second operand 16 states. [2021-02-22 02:24:49,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:24:49,696 INFO L93 Difference]: Finished difference Result 181 states and 248 transitions. [2021-02-22 02:24:49,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-22 02:24:49,698 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2021-02-22 02:24:49,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:24:49,710 INFO L225 Difference]: With dead ends: 181 [2021-02-22 02:24:49,711 INFO L226 Difference]: Without dead ends: 130 [2021-02-22 02:24:49,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=232, Invalid=638, Unknown=0, NotChecked=0, Total=870 [2021-02-22 02:24:49,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-02-22 02:24:49,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 60. [2021-02-22 02:24:49,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-02-22 02:24:49,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2021-02-22 02:24:49,787 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 35 [2021-02-22 02:24:49,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:24:49,788 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2021-02-22 02:24:49,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-02-22 02:24:49,789 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2021-02-22 02:24:49,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-22 02:24:49,790 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:24:49,791 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-02-22 02:24:49,791 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 02:24:49,791 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:24:49,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:24:49,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1775592559, now seen corresponding path program 1 times [2021-02-22 02:24:49,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:24:49,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [999468190] [2021-02-22 02:24:49,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:24:54,847 WARN L202 SmtUtils]: Spent 5.02 s on a formula simplification. DAG size of input: 449 DAG size of output: 200 [2021-02-22 02:24:54,879 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.loopaccelerator.AcceleratorWernerOverapprox.accelerateLoop(AcceleratorWernerOverapprox.java:55) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolationCore.acceleratedInterpolationCoreIsCorrect(AcceleratedInterpolationCore.java:183) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:145) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:241) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:437) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:62) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateAllErrorsAtOnce(TraceAbstractionStarter.java:317) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:131) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-02-22 02:24:54,883 INFO L168 Benchmark]: Toolchain (without parser) took 8647.82 ms. Allocated memory was 161.5 MB in the beginning and 251.7 MB in the end (delta: 90.2 MB). Free memory was 137.7 MB in the beginning and 232.7 MB in the end (delta: -95.0 MB). Peak memory consumption was 140.9 MB. Max. memory is 8.0 GB. [2021-02-22 02:24:54,884 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 161.5 MB. Free memory is still 136.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 02:24:54,885 INFO L168 Benchmark]: CACSL2BoogieTranslator took 331.91 ms. Allocated memory is still 161.5 MB. Free memory was 136.7 MB in the beginning and 126.6 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-22 02:24:54,885 INFO L168 Benchmark]: Boogie Preprocessor took 39.00 ms. Allocated memory is still 161.5 MB. Free memory was 126.6 MB in the beginning and 125.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-22 02:24:54,886 INFO L168 Benchmark]: RCFGBuilder took 565.28 ms. Allocated memory is still 161.5 MB. Free memory was 125.0 MB in the beginning and 144.0 MB in the end (delta: -19.0 MB). Peak memory consumption was 22.8 MB. Max. memory is 8.0 GB. [2021-02-22 02:24:54,887 INFO L168 Benchmark]: TraceAbstraction took 7689.49 ms. Allocated memory was 161.5 MB in the beginning and 251.7 MB in the end (delta: 90.2 MB). Free memory was 143.3 MB in the beginning and 232.7 MB in the end (delta: -89.4 MB). Peak memory consumption was 145.3 MB. Max. memory is 8.0 GB. [2021-02-22 02:24:54,891 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 161.5 MB. Free memory is still 136.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 331.91 ms. Allocated memory is still 161.5 MB. Free memory was 136.7 MB in the beginning and 126.6 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 39.00 ms. Allocated memory is still 161.5 MB. Free memory was 126.6 MB in the beginning and 125.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 565.28 ms. Allocated memory is still 161.5 MB. Free memory was 125.0 MB in the beginning and 144.0 MB in the end (delta: -19.0 MB). Peak memory consumption was 22.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 7689.49 ms. Allocated memory was 161.5 MB in the beginning and 251.7 MB in the end (delta: 90.2 MB). Free memory was 143.3 MB in the beginning and 232.7 MB in the end (delta: -89.4 MB). Peak memory consumption was 145.3 MB. Max. memory is 8.0 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.loopaccelerator.AcceleratorWernerOverapprox.accelerateLoop(AcceleratorWernerOverapprox.java:55) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...