/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/loop-crafted/simple_vardep_2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-22 02:21:53,899 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 02:21:53,904 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 02:21:53,970 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-22 02:21:54,007 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-22 02:21:54,010 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-22 02:21:54,013 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-22 02:21:54,014 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-22 02:21:54,019 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-22 02:21:54,021 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-22 02:21:54,029 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-22 02:21:54,037 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-22 02:21:54,039 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-22 02:21:54,043 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-22 02:21:54,045 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-22 02:21:54,046 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-22 02:21:54,053 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-22 02:21:54,074 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 02:21:54,101 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 02:21:54,102 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 02:21:54,107 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 02:21:54,108 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 02:21:54,108 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 02:21:54,108 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 02:21:54,108 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 02:21:54,108 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 02:21:54,109 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 02:21:54,109 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 02:21:54,110 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 02:21:54,110 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 02:21:54,111 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 02:21:54,111 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 02:21:54,111 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 02:21:54,112 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 02:21:54,112 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 02:21:54,112 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 02:21:54,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 02:21:54,112 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 02:21:54,113 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 02:21:54,113 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 02:21:54,113 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 02:21:54,113 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 02:21:54,483 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 02:21:54,510 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 02:21:54,514 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 02:21:54,515 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 02:21:54,516 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 02:21:54,517 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_vardep_2.c [2021-02-22 02:21:54,594 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e876d8dbe/c8f07ee7cbb74d6e92c8b633cdac1170/FLAG671f703fb [2021-02-22 02:21:55,297 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 02:21:55,297 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_vardep_2.c [2021-02-22 02:21:55,305 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e876d8dbe/c8f07ee7cbb74d6e92c8b633cdac1170/FLAG671f703fb [2021-02-22 02:21:55,661 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e876d8dbe/c8f07ee7cbb74d6e92c8b633cdac1170 [2021-02-22 02:21:55,665 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 02:21:55,681 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 02:21:55,685 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 02:21:55,685 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 02:21:55,689 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 02:21:55,690 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:21:55" (1/1) ... [2021-02-22 02:21:55,692 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@398b4a6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:55, skipping insertion in model container [2021-02-22 02:21:55,692 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:21:55" (1/1) ... [2021-02-22 02:21:55,700 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 02:21:55,718 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 02:21:55,940 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_vardep_2.c[584,597] [2021-02-22 02:21:55,966 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:21:55,981 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 02:21:55,997 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_vardep_2.c[584,597] [2021-02-22 02:21:56,003 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:21:56,022 INFO L208 MainTranslator]: Completed translation [2021-02-22 02:21:56,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:56 WrapperNode [2021-02-22 02:21:56,023 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 02:21:56,024 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 02:21:56,024 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 02:21:56,024 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 02:21:56,039 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:56" (1/1) ... [2021-02-22 02:21:56,039 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:56" (1/1) ... [2021-02-22 02:21:56,046 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:56" (1/1) ... [2021-02-22 02:21:56,046 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:56" (1/1) ... [2021-02-22 02:21:56,052 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:56" (1/1) ... [2021-02-22 02:21:56,056 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:56" (1/1) ... [2021-02-22 02:21:56,058 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:56" (1/1) ... [2021-02-22 02:21:56,060 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 02:21:56,061 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 02:21:56,061 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 02:21:56,061 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 02:21:56,062 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:56" (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 02:21:56,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 02:21:56,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 02:21:56,164 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 02:21:56,165 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-22 02:21:56,165 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 02:21:56,165 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 02:21:56,165 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 02:21:56,166 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 02:21:56,166 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 02:21:56,167 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-22 02:21:56,167 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 02:21:56,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 02:21:56,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 02:21:56,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 02:21:56,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 02:21:56,169 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 02:21:56,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 02:21:56,423 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 02:21:56,423 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-22 02:21:56,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:21:56 BoogieIcfgContainer [2021-02-22 02:21:56,425 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 02:21:56,428 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 02:21:56,428 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 02:21:56,432 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 02:21:56,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 02:21:55" (1/3) ... [2021-02-22 02:21:56,433 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56d1874e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:21:56, skipping insertion in model container [2021-02-22 02:21:56,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:56" (2/3) ... [2021-02-22 02:21:56,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56d1874e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:21:56, skipping insertion in model container [2021-02-22 02:21:56,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:21:56" (3/3) ... [2021-02-22 02:21:56,437 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_vardep_2.c [2021-02-22 02:21:56,447 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 02:21:56,454 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 02:21:56,482 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 02:21:56,544 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 02:21:56,544 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 02:21:56,544 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 02:21:56,545 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 02:21:56,545 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 02:21:56,545 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 02:21:56,545 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 02:21:56,545 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 02:21:56,570 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2021-02-22 02:21:56,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-22 02:21:56,607 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:21:56,608 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] [2021-02-22 02:21:56,613 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:21:56,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:21:56,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1490799159, now seen corresponding path program 1 times [2021-02-22 02:21:56,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:21:56,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [118335058] [2021-02-22 02:21:56,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:21:56,764 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:21:56,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:57,136 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:57,138 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:57,139 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:57,140 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:21:57,163 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:57,164 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:21:57,177 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:57,178 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-22 02:21:57,193 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:57,194 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:57,248 WARN L141 QuantifierPusher]: treesize reduction 23, result has 83.6 percent of original size [2021-02-22 02:21:57,266 WARN L147 QuantifierPusher]: treesize reduction 23, result has 83.6 percent of original size 117 [2021-02-22 02:21:57,434 WARN L141 QuantifierPusher]: treesize reduction 46, result has 82.4 percent of original size [2021-02-22 02:21:57,451 WARN L147 QuantifierPusher]: treesize reduction 46, result has 82.4 percent of original size 215 [2021-02-22 02:21:57,668 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 35 [2021-02-22 02:21:57,673 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:57,674 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:21:57,688 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:57,690 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:21:57,704 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:57,705 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:57,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:21:57,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:57,767 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:57,767 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:57,774 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 02:21:57,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [118335058] [2021-02-22 02:21:57,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:21:57,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-02-22 02:21:57,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504206441] [2021-02-22 02:21:57,784 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-22 02:21:57,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:21:57,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-22 02:21:57,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-02-22 02:21:57,825 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 11 states. [2021-02-22 02:21:58,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:21:58,492 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2021-02-22 02:21:58,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-22 02:21:58,494 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2021-02-22 02:21:58,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:21:58,502 INFO L225 Difference]: With dead ends: 59 [2021-02-22 02:21:58,502 INFO L226 Difference]: Without dead ends: 37 [2021-02-22 02:21:58,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-02-22 02:21:58,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-02-22 02:21:58,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2021-02-22 02:21:58,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-02-22 02:21:58,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-02-22 02:21:58,557 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 23 [2021-02-22 02:21:58,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:21:58,557 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-02-22 02:21:58,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-22 02:21:58,558 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-02-22 02:21:58,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-22 02:21:58,559 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:21:58,559 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] [2021-02-22 02:21:58,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 02:21:58,560 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:21:58,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:21:58,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1740881698, now seen corresponding path program 1 times [2021-02-22 02:21:58,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:21:58,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1317247582] [2021-02-22 02:21:58,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:22:13,572 WARN L202 SmtUtils]: Spent 14.97 s on a formula simplification. DAG size of input: 1824 DAG size of output: 374 [2021-02-22 02:22:13,603 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 02:22:13,613 INFO L168 Benchmark]: Toolchain (without parser) took 17944.14 ms. Allocated memory was 159.4 MB in the beginning and 241.2 MB in the end (delta: 81.8 MB). Free memory was 135.2 MB in the beginning and 116.6 MB in the end (delta: 18.6 MB). Peak memory consumption was 137.4 MB. Max. memory is 8.0 GB. [2021-02-22 02:22:13,615 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 159.4 MB. Free memory is still 132.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 02:22:13,617 INFO L168 Benchmark]: CACSL2BoogieTranslator took 338.29 ms. Allocated memory is still 159.4 MB. Free memory was 134.0 MB in the beginning and 124.8 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-22 02:22:13,620 INFO L168 Benchmark]: Boogie Preprocessor took 35.99 ms. Allocated memory is still 159.4 MB. Free memory was 124.8 MB in the beginning and 123.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-22 02:22:13,621 INFO L168 Benchmark]: RCFGBuilder took 364.49 ms. Allocated memory is still 159.4 MB. Free memory was 123.4 MB in the beginning and 110.5 MB in the end (delta: 12.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-02-22 02:22:13,623 INFO L168 Benchmark]: TraceAbstraction took 17183.37 ms. Allocated memory was 159.4 MB in the beginning and 241.2 MB in the end (delta: 81.8 MB). Free memory was 110.1 MB in the beginning and 116.6 MB in the end (delta: -6.5 MB). Peak memory consumption was 112.2 MB. Max. memory is 8.0 GB. [2021-02-22 02:22:13,638 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 159.4 MB. Free memory is still 132.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 338.29 ms. Allocated memory is still 159.4 MB. Free memory was 134.0 MB in the beginning and 124.8 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.99 ms. Allocated memory is still 159.4 MB. Free memory was 124.8 MB in the beginning and 123.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 364.49 ms. Allocated memory is still 159.4 MB. Free memory was 123.4 MB in the beginning and 110.5 MB in the end (delta: 12.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 17183.37 ms. Allocated memory was 159.4 MB in the beginning and 241.2 MB in the end (delta: 81.8 MB). Free memory was 110.1 MB in the beginning and 116.6 MB in the end (delta: -6.5 MB). Peak memory consumption was 112.2 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...