/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-lit/bhmr2007.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 04:48:57,970 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 04:48:57,973 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 04:48:58,007 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 04:48:58,020 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 04:48:58,021 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 04:48:58,023 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 04:48:58,024 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 04:48:58,025 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 04:48:58,026 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 04:48:58,029 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 04:48:58,031 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 04:48:58,033 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 04:48:58,038 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 04:48:58,040 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 04:48:58,042 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 04:48:58,051 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-24 04:48:58,103 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-24 04:48:58,104 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-24 04:48:58,105 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-24 04:48:58,107 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 04:48:58,130 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 04:48:58,131 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 04:48:58,135 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 04:48:58,135 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 04:48:58,136 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 04:48:58,136 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 04:48:58,136 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 04:48:58,137 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 04:48:58,137 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 04:48:58,137 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 04:48:58,139 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 04:48:58,139 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 04:48:58,139 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 04:48:58,140 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 04:48:58,140 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 04:48:58,140 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 04:48:58,140 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 04:48:58,141 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 04:48:58,141 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 04:48:58,141 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 04:48:58,142 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 04:48:58,142 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 04:48:58,142 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-24 04:48:58,143 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-24 04:48:58,589 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 04:48:58,615 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 04:48:58,618 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 04:48:58,620 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 04:48:58,622 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 04:48:58,624 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/bhmr2007.i [2021-02-24 04:48:58,712 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8400a0ed3/771d2d27cc854693a965ad23720705a9/FLAG7a9d53497 [2021-02-24 04:48:59,386 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 04:48:59,387 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/bhmr2007.i [2021-02-24 04:48:59,394 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8400a0ed3/771d2d27cc854693a965ad23720705a9/FLAG7a9d53497 [2021-02-24 04:48:59,750 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8400a0ed3/771d2d27cc854693a965ad23720705a9 [2021-02-24 04:48:59,753 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 04:48:59,765 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 04:48:59,767 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 04:48:59,767 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 04:48:59,771 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 04:48:59,772 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:48:59" (1/1) ... [2021-02-24 04:48:59,773 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e396bde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:59, skipping insertion in model container [2021-02-24 04:48:59,774 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:48:59" (1/1) ... [2021-02-24 04:48:59,782 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 04:48:59,799 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 04:48:59,972 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-lit/bhmr2007.i[895,908] [2021-02-24 04:48:59,984 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:48:59,994 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 04:49:00,009 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-lit/bhmr2007.i[895,908] [2021-02-24 04:49:00,014 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:49:00,031 INFO L208 MainTranslator]: Completed translation [2021-02-24 04:49:00,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:49:00 WrapperNode [2021-02-24 04:49:00,032 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 04:49:00,033 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 04:49:00,033 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 04:49:00,033 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 04:49:00,044 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:49:00" (1/1) ... [2021-02-24 04:49:00,044 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:49:00" (1/1) ... [2021-02-24 04:49:00,050 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:49:00" (1/1) ... [2021-02-24 04:49:00,051 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:49:00" (1/1) ... [2021-02-24 04:49:00,057 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:49:00" (1/1) ... [2021-02-24 04:49:00,062 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:49:00" (1/1) ... [2021-02-24 04:49:00,064 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:49:00" (1/1) ... [2021-02-24 04:49:00,066 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 04:49:00,067 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 04:49:00,067 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 04:49:00,067 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 04:49:00,068 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:49:00" (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 04:49:00,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 04:49:00,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 04:49:00,172 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 04:49:00,172 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-24 04:49:00,172 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-24 04:49:00,172 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 04:49:00,173 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 04:49:00,173 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 04:49:00,173 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-24 04:49:00,173 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-24 04:49:00,173 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 04:49:00,174 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 04:49:00,174 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-24 04:49:00,174 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-24 04:49:00,174 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-24 04:49:00,174 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 04:49:00,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 04:49:00,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 04:49:00,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 04:49:00,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 04:49:00,175 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 04:49:00,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 04:49:00,479 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 04:49:00,480 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-24 04:49:00,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:49:00 BoogieIcfgContainer [2021-02-24 04:49:00,486 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 04:49:00,515 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 04:49:00,515 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 04:49:00,525 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 04:49:00,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 04:48:59" (1/3) ... [2021-02-24 04:49:00,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@126b8fbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:49:00, skipping insertion in model container [2021-02-24 04:49:00,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:49:00" (2/3) ... [2021-02-24 04:49:00,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@126b8fbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:49:00, skipping insertion in model container [2021-02-24 04:49:00,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:49:00" (3/3) ... [2021-02-24 04:49:00,538 INFO L111 eAbstractionObserver]: Analyzing ICFG bhmr2007.i [2021-02-24 04:49:00,556 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 04:49:00,566 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 04:49:00,615 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 04:49:00,675 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 04:49:00,675 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 04:49:00,675 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-24 04:49:00,675 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 04:49:00,676 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 04:49:00,676 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 04:49:00,676 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 04:49:00,679 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 04:49:00,715 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2021-02-24 04:49:00,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-24 04:49:00,733 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:49:00,737 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] [2021-02-24 04:49:00,737 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:49:00,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:49:00,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1301066525, now seen corresponding path program 1 times [2021-02-24 04:49:00,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:49:00,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [161118486] [2021-02-24 04:49:00,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:49:00,840 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:49:00,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:49:01,016 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:49:01,018 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:49:01,019 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:49:01,020 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:49:01,041 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:49:01,042 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:49:01,054 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:49:01,056 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-24 04:49:01,075 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:49:01,076 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-24 04:49:01,082 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-24 04:49:01,085 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-24 04:49:01,126 WARN L141 QuantifierPusher]: treesize reduction 10, result has 75.6 percent of original size [2021-02-24 04:49:01,128 WARN L147 QuantifierPusher]: treesize reduction 10, result has 75.6 percent of original size 31 [2021-02-24 04:49:01,179 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:49:01,180 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:49:01,194 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:49:01,197 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:49:01,212 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:49:01,215 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:49:01,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:49:01,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:49:01,297 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:49:01,298 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:49:01,320 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 04:49:01,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [161118486] [2021-02-24 04:49:01,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:49:01,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-24 04:49:01,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403811396] [2021-02-24 04:49:01,332 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-24 04:49:01,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:49:01,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-24 04:49:01,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-02-24 04:49:01,354 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 10 states. [2021-02-24 04:49:01,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:49:01,933 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2021-02-24 04:49:01,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-24 04:49:01,935 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2021-02-24 04:49:01,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:49:01,942 INFO L225 Difference]: With dead ends: 78 [2021-02-24 04:49:01,942 INFO L226 Difference]: Without dead ends: 47 [2021-02-24 04:49:01,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-02-24 04:49:01,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-02-24 04:49:01,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2021-02-24 04:49:01,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-02-24 04:49:01,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2021-02-24 04:49:01,993 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 27 [2021-02-24 04:49:01,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:49:01,994 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2021-02-24 04:49:01,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-24 04:49:01,994 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2021-02-24 04:49:01,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-24 04:49:01,996 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:49:01,996 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] [2021-02-24 04:49:01,996 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 04:49:01,997 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:49:01,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:49:01,998 INFO L82 PathProgramCache]: Analyzing trace with hash 981129577, now seen corresponding path program 1 times [2021-02-24 04:49:01,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:49:01,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1386148480] [2021-02-24 04:49:01,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:49:02,019 WARN L141 QuantifierPusher]: treesize reduction 8, result has 74.2 percent of original size [2021-02-24 04:49:02,038 WARN L147 QuantifierPusher]: treesize reduction 8, result has 74.2 percent of original size 23 [2021-02-24 04:49:02,046 WARN L141 QuantifierPusher]: treesize reduction 8, result has 74.2 percent of original size [2021-02-24 04:49:02,049 WARN L147 QuantifierPusher]: treesize reduction 8, result has 74.2 percent of original size 23 [2021-02-24 04:49:02,064 WARN L141 QuantifierPusher]: treesize reduction 4, result has 81.0 percent of original size [2021-02-24 04:49:02,082 INFO L723 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2021-02-24 04:49:02,087 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:49:02,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:49:02,089 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:49:02,096 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 04:49:02,099 WARN L147 QuantifierPusher]: treesize reduction 4, result has 81.0 percent of original size 17 [2021-02-24 04:49:02,104 WARN L141 QuantifierPusher]: treesize reduction 7, result has 88.7 percent of original size [2021-02-24 04:49:02,109 WARN L147 QuantifierPusher]: treesize reduction 7, result has 88.7 percent of original size 55 [2021-02-24 04:49:02,110 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-02-24 04:49:02,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 04:49:02,137 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 04:49:02,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 04:49:02,193 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 04:49:02,240 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-24 04:49:02,240 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-24 04:49:02,241 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-24 04:49:02,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 04:49:02 BoogieIcfgContainer [2021-02-24 04:49:02,265 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 04:49:02,270 INFO L168 Benchmark]: Toolchain (without parser) took 2512.04 ms. Allocated memory is still 160.4 MB. Free memory was 137.2 MB in the beginning and 90.1 MB in the end (delta: 47.0 MB). Peak memory consumption was 48.6 MB. Max. memory is 8.0 GB. [2021-02-24 04:49:02,275 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 160.4 MB. Free memory is still 136.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 04:49:02,277 INFO L168 Benchmark]: CACSL2BoogieTranslator took 265.37 ms. Allocated memory is still 160.4 MB. Free memory was 136.2 MB in the beginning and 126.4 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-24 04:49:02,279 INFO L168 Benchmark]: Boogie Preprocessor took 33.13 ms. Allocated memory is still 160.4 MB. Free memory was 126.4 MB in the beginning and 124.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-24 04:49:02,281 INFO L168 Benchmark]: RCFGBuilder took 418.86 ms. Allocated memory is still 160.4 MB. Free memory was 124.9 MB in the beginning and 108.9 MB in the end (delta: 16.0 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-02-24 04:49:02,286 INFO L168 Benchmark]: TraceAbstraction took 1751.19 ms. Allocated memory is still 160.4 MB. Free memory was 144.5 MB in the beginning and 90.1 MB in the end (delta: 54.3 MB). Peak memory consumption was 54.3 MB. Max. memory is 8.0 GB. [2021-02-24 04:49:02,293 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 160.4 MB. Free memory is still 136.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 265.37 ms. Allocated memory is still 160.4 MB. Free memory was 136.2 MB in the beginning and 126.4 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 33.13 ms. Allocated memory is still 160.4 MB. Free memory was 126.4 MB in the beginning and 124.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 418.86 ms. Allocated memory is still 160.4 MB. Free memory was 124.9 MB in the beginning and 108.9 MB in the end (delta: 16.0 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1751.19 ms. Allocated memory is still 160.4 MB. Free memory was 144.5 MB in the beginning and 90.1 MB in the end (delta: 54.3 MB). Peak memory consumption was 54.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 19]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L25] int i, n, a, b; [L26] i = 0 [L26] a = 0 [L26] b = 0 [L26] n = __VERIFIER_nondet_int() [L27] COND FALSE !(!(n >= 0 && n <= 1000000)) [L28] COND TRUE i < n [L29] COND FALSE !(__VERIFIER_nondet_int()) [L33] a = a + 2 [L34] b = b + 1 [L36] i = i + 1 [L28] COND FALSE !(i < n) [L38] CALL __VERIFIER_assert(a + b == 3*n) [L18] COND TRUE !(cond) [L19] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 56 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 41 SDtfs, 110 SDslu, 63 SDs, 0 SdLazy, 156 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 9 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...