/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/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loop-zilu/benchmark20_conjunctive.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-1a84f73 [2021-05-01 08:12:29,818 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-01 08:12:29,819 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-01 08:12:29,839 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-01 08:12:29,839 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-01 08:12:29,840 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-01 08:12:29,841 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-01 08:12:29,842 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-01 08:12:29,844 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-01 08:12:29,844 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-01 08:12:29,845 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-01 08:12:29,846 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-01 08:12:29,846 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-01 08:12:29,847 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-01 08:12:29,847 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-01 08:12:29,848 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-01 08:12:29,849 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-01 08:12:29,849 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-01 08:12:29,850 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-01 08:12:29,851 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-01 08:12:29,852 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-01 08:12:29,853 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-01 08:12:29,854 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-01 08:12:29,855 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-01 08:12:29,856 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-01 08:12:29,861 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-01 08:12:29,862 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-01 08:12:29,862 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-01 08:12:29,863 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-01 08:12:29,870 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-01 08:12:29,870 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-01 08:12:29,871 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-01 08:12:29,871 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-01 08:12:29,871 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-01 08:12:29,871 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-01 08:12:29,871 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-01 08:12:29,871 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-01 08:12:29,871 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-01 08:12:29,872 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-01 08:12:29,872 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-01 08:12:29,872 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-01 08:12:29,872 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-01 08:12:29,872 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-01 08:12:29,872 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-01 08:12:29,872 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-01 08:12:29,872 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-01 08:12:29,872 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-01 08:12:29,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-01 08:12:29,873 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-01 08:12:29,873 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-01 08:12:29,873 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-01 08:12:29,873 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-01 08:12:29,873 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-01 08:12:30,139 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-01 08:12:30,158 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-01 08:12:30,160 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-01 08:12:30,161 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-01 08:12:30,162 INFO L275 PluginConnector]: CDTParser initialized [2021-05-01 08:12:30,163 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-zilu/benchmark20_conjunctive.i [2021-05-01 08:12:30,238 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fbf81096/cfe58b6dcf984087a741ca012a5be429/FLAGc8038f57a [2021-05-01 08:12:30,641 INFO L306 CDTParser]: Found 1 translation units. [2021-05-01 08:12:30,641 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-zilu/benchmark20_conjunctive.i [2021-05-01 08:12:30,645 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fbf81096/cfe58b6dcf984087a741ca012a5be429/FLAGc8038f57a [2021-05-01 08:12:30,657 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fbf81096/cfe58b6dcf984087a741ca012a5be429 [2021-05-01 08:12:30,658 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-01 08:12:30,660 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-01 08:12:30,661 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-01 08:12:30,661 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-01 08:12:30,663 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-01 08:12:30,664 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:12:30" (1/1) ... [2021-05-01 08:12:30,665 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65222db5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:12:30, skipping insertion in model container [2021-05-01 08:12:30,665 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:12:30" (1/1) ... [2021-05-01 08:12:30,670 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-01 08:12:30,680 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-01 08:12:30,791 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-zilu/benchmark20_conjunctive.i[873,886] [2021-05-01 08:12:30,797 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:12:30,802 INFO L203 MainTranslator]: Completed pre-run [2021-05-01 08:12:30,810 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-zilu/benchmark20_conjunctive.i[873,886] [2021-05-01 08:12:30,811 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:12:30,820 INFO L208 MainTranslator]: Completed translation [2021-05-01 08:12:30,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:12:30 WrapperNode [2021-05-01 08:12:30,820 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-01 08:12:30,821 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-01 08:12:30,821 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-01 08:12:30,821 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-01 08:12:30,827 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:12:30" (1/1) ... [2021-05-01 08:12:30,828 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:12:30" (1/1) ... [2021-05-01 08:12:30,832 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:12:30" (1/1) ... [2021-05-01 08:12:30,832 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:12:30" (1/1) ... [2021-05-01 08:12:30,860 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:12:30" (1/1) ... [2021-05-01 08:12:30,871 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:12:30" (1/1) ... [2021-05-01 08:12:30,871 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:12:30" (1/1) ... [2021-05-01 08:12:30,873 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-01 08:12:30,873 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-01 08:12:30,873 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-01 08:12:30,873 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-01 08:12:30,874 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:12:30" (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 [2021-05-01 08:12:30,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-01 08:12:30,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-01 08:12:30,978 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-01 08:12:30,978 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-01 08:12:30,978 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-01 08:12:30,978 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-01 08:12:30,979 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-01 08:12:30,979 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-01 08:12:30,979 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-01 08:12:30,979 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-01 08:12:30,979 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-01 08:12:30,980 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-05-01 08:12:30,980 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-01 08:12:30,980 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-01 08:12:30,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-01 08:12:30,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-01 08:12:30,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-01 08:12:30,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-01 08:12:30,982 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-01 08:12:30,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-01 08:12:31,136 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-01 08:12:31,136 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-01 08:12:31,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:12:31 BoogieIcfgContainer [2021-05-01 08:12:31,138 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-01 08:12:31,139 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-01 08:12:31,139 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-01 08:12:31,141 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-01 08:12:31,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.05 08:12:30" (1/3) ... [2021-05-01 08:12:31,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cefd10a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:12:31, skipping insertion in model container [2021-05-01 08:12:31,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:12:30" (2/3) ... [2021-05-01 08:12:31,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cefd10a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:12:31, skipping insertion in model container [2021-05-01 08:12:31,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:12:31" (3/3) ... [2021-05-01 08:12:31,143 INFO L111 eAbstractionObserver]: Analyzing ICFG benchmark20_conjunctive.i [2021-05-01 08:12:31,147 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-01 08:12:31,150 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-01 08:12:31,162 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-01 08:12:31,175 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-01 08:12:31,176 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-01 08:12:31,176 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-01 08:12:31,176 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-01 08:12:31,176 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-01 08:12:31,176 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-01 08:12:31,176 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-01 08:12:31,176 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-01 08:12:31,186 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-01 08:12:31,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-01 08:12:31,191 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:12:31,191 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 08:12:31,191 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:12:31,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:12:31,195 INFO L82 PathProgramCache]: Analyzing trace with hash -304977768, now seen corresponding path program 1 times [2021-05-01 08:12:31,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:12:31,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288121565] [2021-05-01 08:12:31,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:12:31,242 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:12:31,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:12:31,364 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:12:31,365 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:12:31,366 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:12:31,366 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:12:31,370 INFO L142 QuantifierPusher]: treesize reduction 9, result has 25.0 percent of original size [2021-05-01 08:12:31,371 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 08:12:31,378 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:12:31,378 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 08:12:31,382 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:12:31,383 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 08:12:31,387 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:12:31,388 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:12:31,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 08:12:31,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:12:31,417 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:12:31,418 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:12:31,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 08:12:31,420 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 08:12:31,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288121565] [2021-05-01 08:12:31,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1288121565] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 08:12:31,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 08:12:31,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-01 08:12:31,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781387921] [2021-05-01 08:12:31,425 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-01 08:12:31,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 08:12:31,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-01 08:12:31,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-01 08:12:31,435 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-01 08:12:31,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 08:12:31,625 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2021-05-01 08:12:31,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-01 08:12:31,626 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-01 08:12:31,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 08:12:31,632 INFO L225 Difference]: With dead ends: 41 [2021-05-01 08:12:31,632 INFO L226 Difference]: Without dead ends: 14 [2021-05-01 08:12:31,637 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 123.6ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-01 08:12:31,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-05-01 08:12:31,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-05-01 08:12:31,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-01 08:12:31,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-05-01 08:12:31,666 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2021-05-01 08:12:31,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 08:12:31,666 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-05-01 08:12:31,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-01 08:12:31,667 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-05-01 08:12:31,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-01 08:12:31,668 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:12:31,668 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 08:12:31,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-01 08:12:31,669 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:12:31,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:12:31,671 INFO L82 PathProgramCache]: Analyzing trace with hash -828987386, now seen corresponding path program 1 times [2021-05-01 08:12:31,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:12:31,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [828575941] [2021-05-01 08:12:31,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:12:31,703 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:12:31,713 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 08:12:31,714 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_8 v_main_~n~0_6) InVars {main_~i~0=v_main_~i~0_8, main_~n~0=v_main_~n~0_6} OutVars{main_~i~0=v_main_~i~0_8, main_~n~0=v_main_~n~0_6} AuxVars[] AssignedVars[] [2021-05-01 08:12:31,758 WARN L240 tifierPushTermWalker]: treesize reduction 14, result has 92.0 percent of original size [2021-05-01 08:12:31,777 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:12:31,799 INFO L108 tifierPushTermWalker]: treesize reduction 2, result has 33.3 percent of original size [2021-05-01 08:12:31,801 INFO L108 tifierPushTermWalker]: treesize reduction 10, result has 9.1 percent of original size [2021-05-01 08:12:34,330 WARN L205 SmtUtils]: Spent 2.53 s on a formula simplification. DAG size of input: 3 DAG size of output: 1 [2021-05-01 08:12:34,331 INFO L108 tifierPushTermWalker]: treesize reduction 2, result has 33.3 percent of original size [2021-05-01 08:12:34,682 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-05-01 08:12:34,683 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:12:34,685 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-05-01 08:12:34,689 INFO L108 tifierPushTermWalker]: treesize reduction 2, result has 33.3 percent of original size [2021-05-01 08:12:34,767 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:12:35,118 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-05-01 08:12:35,118 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:12:35,196 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:12:35,431 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-05-01 08:12:35,431 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:12:35,811 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-05-01 08:12:35,812 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:12:35,817 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:12:35,823 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:12:35,826 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:12:35,829 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:12:35,832 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:12:35,834 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:12:35,850 INFO L108 tifierPushTermWalker]: treesize reduction 2, result has 33.3 percent of original size [2021-05-01 08:12:35,860 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:12:35,865 INFO L108 tifierPushTermWalker]: treesize reduction 10, result has 9.1 percent of original size [2021-05-01 08:12:35,867 INFO L108 tifierPushTermWalker]: treesize reduction 2, result has 33.3 percent of original size [2021-05-01 08:12:35,868 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-01 08:12:35,872 INFO L108 tifierPushTermWalker]: treesize reduction 2, result has 33.3 percent of original size [2021-05-01 08:12:35,884 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:12:35,929 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:12:35,955 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:12:35,959 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:12:35,963 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:12:35,965 WARN L245 tifierPushTermWalker]: treesize reduction 14, result has 92.0 percent of original size 162 [2021-05-01 08:12:43,000 WARN L205 SmtUtils]: Spent 7.03 s on a formula simplification that was a NOOP. DAG size: 61 [2021-05-01 08:12:43,003 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:12:43,005 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 209 [2021-05-01 08:12:43,005 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-01 08:12:43,016 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-01 08:12:43,017 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-05-01 08:12:43,019 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-01 08:12:43,028 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-01 08:12:43,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 08:12:43 BoogieIcfgContainer [2021-05-01 08:12:43,028 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-01 08:12:43,029 INFO L168 Benchmark]: Toolchain (without parser) took 12369.22 ms. Allocated memory is still 159.4 MB. Free memory was 124.4 MB in the beginning and 132.0 MB in the end (delta: -7.6 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 08:12:43,029 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 159.4 MB. Free memory is still 141.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 08:12:43,029 INFO L168 Benchmark]: CACSL2BoogieTranslator took 159.91 ms. Allocated memory is still 159.4 MB. Free memory was 124.2 MB in the beginning and 139.8 MB in the end (delta: -15.6 MB). Peak memory consumption was 8.7 MB. Max. memory is 8.0 GB. [2021-05-01 08:12:43,030 INFO L168 Benchmark]: Boogie Preprocessor took 51.56 ms. Allocated memory is still 159.4 MB. Free memory was 139.8 MB in the beginning and 143.8 MB in the end (delta: -4.0 MB). Peak memory consumption was 2.2 MB. Max. memory is 8.0 GB. [2021-05-01 08:12:43,030 INFO L168 Benchmark]: RCFGBuilder took 264.88 ms. Allocated memory is still 159.4 MB. Free memory was 143.8 MB in the beginning and 129.2 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-01 08:12:43,030 INFO L168 Benchmark]: TraceAbstraction took 11889.03 ms. Allocated memory is still 159.4 MB. Free memory was 128.7 MB in the beginning and 132.0 MB in the end (delta: -3.3 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 08:12:43,032 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 159.4 MB. Free memory is still 141.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 159.91 ms. Allocated memory is still 159.4 MB. Free memory was 124.2 MB in the beginning and 139.8 MB in the end (delta: -15.6 MB). Peak memory consumption was 8.7 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 51.56 ms. Allocated memory is still 159.4 MB. Free memory was 139.8 MB in the beginning and 143.8 MB in the end (delta: -4.0 MB). Peak memory consumption was 2.2 MB. Max. memory is 8.0 GB. * RCFGBuilder took 264.88 ms. Allocated memory is still 159.4 MB. Free memory was 143.8 MB in the beginning and 129.2 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 11889.03 ms. Allocated memory is still 159.4 MB. Free memory was 128.7 MB in the beginning and 132.0 MB in the end (delta: -3.3 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 16]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L20] int i = __VERIFIER_nondet_int(); [L21] int n = __VERIFIER_nondet_int(); [L22] int sum = __VERIFIER_nondet_int(); [L23] COND FALSE !(!(i==0 && n>=0 && n<=100 && sum==0)) [L24] COND TRUE i=0) [L15] COND TRUE !cond [L16] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 11846.0ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 8.6ms, AutomataDifference: 208.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 18 SDtfs, 25 SDslu, 26 SDs, 0 SdLazy, 53 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 53.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 123.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, InterpolantAutomatonStates: 7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 18.7ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...