/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/sumt5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 04:50:19,251 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 04:50:19,255 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 04:50:19,305 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 04:50:19,320 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 04:50:19,321 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 04:50:19,323 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 04:50:19,324 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 04:50:19,341 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 04:50:19,342 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 04:50:19,344 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 04:50:19,347 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 04:50:19,349 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 04:50:19,350 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 04:50:19,352 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 04:50:19,353 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 04:50:19,356 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-24 04:50:19,367 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-24 04:50:19,368 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-24 04:50:19,369 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-24 04:50:19,371 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-24 04:50:19,383 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 04:50:19,383 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 04:50:19,385 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 04:50:19,386 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 04:50:19,386 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 04:50:19,386 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 04:50:19,387 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 04:50:19,387 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 04:50:19,387 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 04:50:19,388 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 04:50:19,388 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 04:50:19,388 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 04:50:19,389 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 04:50:19,389 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 04:50:19,389 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 04:50:19,389 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 04:50:19,390 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 04:50:19,390 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 04:50:19,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 04:50:19,391 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 04:50:19,391 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 04:50:19,391 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 04:50:19,392 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-24 04:50:19,392 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-24 04:50:19,794 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 04:50:19,826 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 04:50:19,830 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 04:50:19,832 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 04:50:19,837 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 04:50:19,840 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt5.c [2021-02-24 04:50:19,940 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd0f0a7ec/ea17fb20d47d4a5db703d1abf1e1030d/FLAG352c5ab1f [2021-02-24 04:50:20,627 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 04:50:20,628 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt5.c [2021-02-24 04:50:20,636 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd0f0a7ec/ea17fb20d47d4a5db703d1abf1e1030d/FLAG352c5ab1f [2021-02-24 04:50:20,999 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd0f0a7ec/ea17fb20d47d4a5db703d1abf1e1030d [2021-02-24 04:50:21,008 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 04:50:21,025 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 04:50:21,027 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 04:50:21,027 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 04:50:21,032 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 04:50:21,033 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:50:21" (1/1) ... [2021-02-24 04:50:21,034 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78f10475 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:50:21, skipping insertion in model container [2021-02-24 04:50:21,035 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:50:21" (1/1) ... [2021-02-24 04:50:21,044 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 04:50:21,060 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 04:50:21,231 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/sumt5.c[403,416] [2021-02-24 04:50:21,249 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:50:21,261 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 04:50:21,277 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/sumt5.c[403,416] [2021-02-24 04:50:21,285 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:50:21,305 INFO L208 MainTranslator]: Completed translation [2021-02-24 04:50:21,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:50:21 WrapperNode [2021-02-24 04:50:21,306 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 04:50:21,307 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 04:50:21,307 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 04:50:21,307 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 04:50:21,324 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:50:21" (1/1) ... [2021-02-24 04:50:21,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:50:21" (1/1) ... [2021-02-24 04:50:21,334 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:50:21" (1/1) ... [2021-02-24 04:50:21,335 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:50:21" (1/1) ... [2021-02-24 04:50:21,342 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:50:21" (1/1) ... [2021-02-24 04:50:21,347 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:50:21" (1/1) ... [2021-02-24 04:50:21,349 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:50:21" (1/1) ... [2021-02-24 04:50:21,352 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 04:50:21,353 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 04:50:21,353 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 04:50:21,354 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 04:50:21,355 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:50:21" (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 [2021-02-24 04:50:21,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 04:50:21,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 04:50:21,480 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 04:50:21,480 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-24 04:50:21,480 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-24 04:50:21,480 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 04:50:21,481 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 04:50:21,481 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 04:50:21,482 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 04:50:21,482 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 04:50:21,483 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-24 04:50:21,483 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-24 04:50:21,483 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-24 04:50:21,484 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 04:50:21,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 04:50:21,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 04:50:21,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 04:50:21,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 04:50:21,486 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 04:50:21,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 04:50:22,068 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 04:50:22,069 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-24 04:50:22,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:50:22 BoogieIcfgContainer [2021-02-24 04:50:22,072 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 04:50:22,107 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 04:50:22,108 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 04:50:22,116 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 04:50:22,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 04:50:21" (1/3) ... [2021-02-24 04:50:22,117 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79edb95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:50:22, skipping insertion in model container [2021-02-24 04:50:22,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:50:21" (2/3) ... [2021-02-24 04:50:22,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79edb95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:50:22, skipping insertion in model container [2021-02-24 04:50:22,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:50:22" (3/3) ... [2021-02-24 04:50:22,121 INFO L111 eAbstractionObserver]: Analyzing ICFG sumt5.c [2021-02-24 04:50:22,131 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 04:50:22,137 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 04:50:22,162 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 04:50:22,192 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 04:50:22,193 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 04:50:22,193 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-24 04:50:22,193 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 04:50:22,193 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 04:50:22,194 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 04:50:22,194 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 04:50:22,194 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 04:50:22,213 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states. [2021-02-24 04:50:22,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-24 04:50:22,225 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:50:22,227 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] [2021-02-24 04:50:22,228 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:50:22,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:50:22,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1150784678, now seen corresponding path program 1 times [2021-02-24 04:50:22,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:50:22,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1348129152] [2021-02-24 04:50:22,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:50:22,346 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:50:22,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:50:22,601 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:22,603 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:50:22,604 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:22,606 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:50:22,631 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:22,633 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:50:22,655 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:22,657 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-24 04:50:22,688 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:22,690 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-24 04:50:22,726 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:22,728 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-24 04:50:22,773 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:22,775 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-24 04:50:22,833 WARN L141 QuantifierPusher]: treesize reduction 26, result has 71.1 percent of original size [2021-02-24 04:50:22,837 WARN L147 QuantifierPusher]: treesize reduction 26, result has 71.1 percent of original size 64 [2021-02-24 04:50:22,881 WARN L141 QuantifierPusher]: treesize reduction 27, result has 80.9 percent of original size [2021-02-24 04:50:22,887 WARN L147 QuantifierPusher]: treesize reduction 27, result has 80.9 percent of original size 114 [2021-02-24 04:50:22,934 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:22,935 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:50:22,962 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:22,964 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:50:22,993 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:22,995 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:50:23,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:50:23,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:50:23,163 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:50:23,164 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:50:23,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:50:23,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1348129152] [2021-02-24 04:50:23,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:50:23,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-02-24 04:50:23,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550026925] [2021-02-24 04:50:23,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-24 04:50:23,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:50:23,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-24 04:50:23,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-02-24 04:50:23,229 INFO L87 Difference]: Start difference. First operand 49 states. Second operand 11 states. [2021-02-24 04:50:24,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:50:24,470 INFO L93 Difference]: Finished difference Result 129 states and 172 transitions. [2021-02-24 04:50:24,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-24 04:50:24,472 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2021-02-24 04:50:24,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:50:24,484 INFO L225 Difference]: With dead ends: 129 [2021-02-24 04:50:24,484 INFO L226 Difference]: Without dead ends: 80 [2021-02-24 04:50:24,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-02-24 04:50:24,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-02-24 04:50:24,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 42. [2021-02-24 04:50:24,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-02-24 04:50:24,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2021-02-24 04:50:24,550 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 29 [2021-02-24 04:50:24,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:50:24,551 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2021-02-24 04:50:24,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-24 04:50:24,552 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2021-02-24 04:50:24,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-24 04:50:24,553 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:50:24,553 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] [2021-02-24 04:50:24,554 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 04:50:24,554 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:50:24,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:50:24,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1302396788, now seen corresponding path program 1 times [2021-02-24 04:50:24,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:50:24,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1817596822] [2021-02-24 04:50:24,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:50:26,771 WARN L202 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 2917 DAG size of output: 89 [2021-02-24 04:50:26,782 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) [2021-02-24 04:50:26,787 INFO L168 Benchmark]: Toolchain (without parser) took 5775.43 ms. Allocated memory was 155.2 MB in the beginning and 209.7 MB in the end (delta: 54.5 MB). Free memory was 132.0 MB in the beginning and 87.8 MB in the end (delta: 44.2 MB). Peak memory consumption was 118.0 MB. Max. memory is 8.0 GB. [2021-02-24 04:50:26,787 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 155.2 MB. Free memory is still 128.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 04:50:26,788 INFO L168 Benchmark]: CACSL2BoogieTranslator took 278.94 ms. Allocated memory is still 155.2 MB. Free memory was 130.9 MB in the beginning and 120.6 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-24 04:50:26,789 INFO L168 Benchmark]: Boogie Preprocessor took 45.10 ms. Allocated memory is still 155.2 MB. Free memory was 120.6 MB in the beginning and 119.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-24 04:50:26,790 INFO L168 Benchmark]: RCFGBuilder took 718.90 ms. Allocated memory is still 155.2 MB. Free memory was 119.1 MB in the beginning and 137.0 MB in the end (delta: -17.8 MB). Peak memory consumption was 20.1 MB. Max. memory is 8.0 GB. [2021-02-24 04:50:26,791 INFO L168 Benchmark]: TraceAbstraction took 4677.56 ms. Allocated memory was 155.2 MB in the beginning and 209.7 MB in the end (delta: 54.5 MB). Free memory was 136.4 MB in the beginning and 87.8 MB in the end (delta: 48.6 MB). Peak memory consumption was 122.0 MB. Max. memory is 8.0 GB. [2021-02-24 04:50:26,795 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 155.2 MB. Free memory is still 128.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 278.94 ms. Allocated memory is still 155.2 MB. Free memory was 130.9 MB in the beginning and 120.6 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 45.10 ms. Allocated memory is still 155.2 MB. Free memory was 120.6 MB in the beginning and 119.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 718.90 ms. Allocated memory is still 155.2 MB. Free memory was 119.1 MB in the beginning and 137.0 MB in the end (delta: -17.8 MB). Peak memory consumption was 20.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4677.56 ms. Allocated memory was 155.2 MB in the beginning and 209.7 MB in the end (delta: 54.5 MB). Free memory was 136.4 MB in the beginning and 87.8 MB in the end (delta: 48.6 MB). Peak memory consumption was 122.0 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...