/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/gsv2008.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-22 02:23:38,034 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 02:23:38,038 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 02:23:38,075 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-22 02:23:38,089 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-22 02:23:38,091 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-22 02:23:38,092 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-22 02:23:38,094 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-22 02:23:38,112 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-22 02:23:38,114 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-22 02:23:38,123 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-22 02:23:38,130 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-22 02:23:38,132 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-22 02:23:38,136 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-22 02:23:38,139 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-22 02:23:38,142 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-22 02:23:38,152 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-22 02:23:38,170 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-22 02:23:38,172 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-22 02:23:38,173 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-22 02:23:38,174 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 02:23:38,204 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 02:23:38,204 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 02:23:38,209 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 02:23:38,210 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 02:23:38,210 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 02:23:38,210 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 02:23:38,211 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 02:23:38,211 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 02:23:38,211 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 02:23:38,211 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 02:23:38,213 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 02:23:38,213 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 02:23:38,213 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 02:23:38,214 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 02:23:38,215 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 02:23:38,215 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 02:23:38,216 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 02:23:38,216 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 02:23:38,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 02:23:38,216 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 02:23:38,217 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 02:23:38,217 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 02:23:38,217 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 02:23:38,218 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 02:23:38,722 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 02:23:38,761 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 02:23:38,765 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 02:23:38,766 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 02:23:38,767 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 02:23:38,768 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gsv2008.i [2021-02-22 02:23:38,850 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/948fe30c4/8c66c0fbe50e480b8020f73a3b951d79/FLAG7a8959857 [2021-02-22 02:23:39,430 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 02:23:39,431 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gsv2008.i [2021-02-22 02:23:39,438 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/948fe30c4/8c66c0fbe50e480b8020f73a3b951d79/FLAG7a8959857 [2021-02-22 02:23:39,816 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/948fe30c4/8c66c0fbe50e480b8020f73a3b951d79 [2021-02-22 02:23:39,819 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 02:23:39,835 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 02:23:39,841 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 02:23:39,842 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 02:23:39,846 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 02:23:39,847 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:23:39" (1/1) ... [2021-02-22 02:23:39,849 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5decd1bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:23:39, skipping insertion in model container [2021-02-22 02:23:39,850 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:23:39" (1/1) ... [2021-02-22 02:23:39,860 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 02:23:39,880 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 02:23:40,102 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/gsv2008.i[895,908] [2021-02-22 02:23:40,130 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:23:40,141 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 02:23:40,159 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/gsv2008.i[895,908] [2021-02-22 02:23:40,164 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:23:40,188 INFO L208 MainTranslator]: Completed translation [2021-02-22 02:23:40,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:23:40 WrapperNode [2021-02-22 02:23:40,189 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 02:23:40,190 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 02:23:40,190 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 02:23:40,191 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 02:23:40,205 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:23:40" (1/1) ... [2021-02-22 02:23:40,206 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:23:40" (1/1) ... [2021-02-22 02:23:40,213 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:23:40" (1/1) ... [2021-02-22 02:23:40,214 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:23:40" (1/1) ... [2021-02-22 02:23:40,219 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:23:40" (1/1) ... [2021-02-22 02:23:40,224 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:23:40" (1/1) ... [2021-02-22 02:23:40,226 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:23:40" (1/1) ... [2021-02-22 02:23:40,228 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 02:23:40,229 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 02:23:40,229 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 02:23:40,229 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 02:23:40,230 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:23:40" (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 02:23:40,315 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 02:23:40,315 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 02:23:40,315 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 02:23:40,315 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-22 02:23:40,315 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-22 02:23:40,316 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 02:23:40,316 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 02:23:40,316 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 02:23:40,316 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-22 02:23:40,316 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-22 02:23:40,316 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 02:23:40,317 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 02:23:40,317 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-22 02:23:40,317 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-22 02:23:40,317 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-22 02:23:40,317 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 02:23:40,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 02:23:40,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 02:23:40,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 02:23:40,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 02:23:40,318 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 02:23:40,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 02:23:40,685 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 02:23:40,687 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-22 02:23:40,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:23:40 BoogieIcfgContainer [2021-02-22 02:23:40,689 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 02:23:40,694 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 02:23:40,694 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 02:23:40,698 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 02:23:40,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 02:23:39" (1/3) ... [2021-02-22 02:23:40,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@452905de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:23:40, skipping insertion in model container [2021-02-22 02:23:40,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:23:40" (2/3) ... [2021-02-22 02:23:40,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@452905de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:23:40, skipping insertion in model container [2021-02-22 02:23:40,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:23:40" (3/3) ... [2021-02-22 02:23:40,702 INFO L111 eAbstractionObserver]: Analyzing ICFG gsv2008.i [2021-02-22 02:23:40,709 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 02:23:40,716 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 02:23:40,736 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 02:23:40,760 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 02:23:40,761 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 02:23:40,761 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 02:23:40,761 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 02:23:40,761 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 02:23:40,761 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 02:23:40,761 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 02:23:40,761 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 02:23:40,780 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2021-02-22 02:23:40,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-22 02:23:40,789 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:23:40,789 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 02:23:40,790 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:23:40,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:23:40,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1643275085, now seen corresponding path program 1 times [2021-02-22 02:23:40,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:23:40,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [797464032] [2021-02-22 02:23:40,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:23:40,886 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:23:40,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:23:41,113 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:23:41,120 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:23:41,126 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:23:41,128 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-22 02:23:41,157 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:23:41,158 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:23:41,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:23:41,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:23:41,239 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:23:41,242 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:23:41,254 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 02:23:41,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [797464032] [2021-02-22 02:23:41,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:23:41,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-22 02:23:41,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031595303] [2021-02-22 02:23:41,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-22 02:23:41,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:23:41,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-22 02:23:41,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-22 02:23:41,290 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 4 states. [2021-02-22 02:23:41,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:23:41,505 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2021-02-22 02:23:41,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-22 02:23:41,509 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2021-02-22 02:23:41,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:23:41,518 INFO L225 Difference]: With dead ends: 53 [2021-02-22 02:23:41,521 INFO L226 Difference]: Without dead ends: 30 [2021-02-22 02:23:41,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-22 02:23:41,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-02-22 02:23:41,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-02-22 02:23:41,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-02-22 02:23:41,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2021-02-22 02:23:41,597 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 23 [2021-02-22 02:23:41,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:23:41,597 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2021-02-22 02:23:41,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-22 02:23:41,598 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2021-02-22 02:23:41,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-22 02:23:41,599 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:23:41,600 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] [2021-02-22 02:23:41,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 02:23:41,600 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:23:41,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:23:41,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1973914334, now seen corresponding path program 1 times [2021-02-22 02:23:41,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:23:41,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194271804] [2021-02-22 02:23:41,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:23:41,642 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:23:41,657 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-22 02:23:41,666 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:23:41,669 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-22 02:23:41,679 WARN L141 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size [2021-02-22 02:23:41,698 WARN L147 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size 13 [2021-02-22 02:23:41,706 WARN L141 QuantifierPusher]: treesize reduction 5, result has 87.2 percent of original size [2021-02-22 02:23:41,718 WARN L147 QuantifierPusher]: treesize reduction 5, result has 87.2 percent of original size 34 [2021-02-22 02:23:41,720 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-02-22 02:23:41,763 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-02-22 02:23:41,764 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-22 02:23:41,769 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-22 02:23:41,787 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-02-22 02:23:41,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.02 02:23:41 BoogieIcfgContainer [2021-02-22 02:23:41,787 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-22 02:23:41,793 INFO L168 Benchmark]: Toolchain (without parser) took 1966.49 ms. Allocated memory is still 151.0 MB. Free memory was 127.2 MB in the beginning and 86.9 MB in the end (delta: 40.3 MB). Peak memory consumption was 40.6 MB. Max. memory is 8.0 GB. [2021-02-22 02:23:41,794 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory is still 124.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 02:23:41,795 INFO L168 Benchmark]: CACSL2BoogieTranslator took 347.80 ms. Allocated memory is still 151.0 MB. Free memory was 126.1 MB in the beginning and 116.6 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-22 02:23:41,796 INFO L168 Benchmark]: Boogie Preprocessor took 38.23 ms. Allocated memory is still 151.0 MB. Free memory was 116.6 MB in the beginning and 115.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-22 02:23:41,798 INFO L168 Benchmark]: RCFGBuilder took 463.47 ms. Allocated memory is still 151.0 MB. Free memory was 115.2 MB in the beginning and 131.5 MB in the end (delta: -16.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-02-22 02:23:41,799 INFO L168 Benchmark]: TraceAbstraction took 1093.43 ms. Allocated memory is still 151.0 MB. Free memory was 131.5 MB in the beginning and 86.9 MB in the end (delta: 44.6 MB). Peak memory consumption was 44.0 MB. Max. memory is 8.0 GB. [2021-02-22 02:23:41,809 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory is still 124.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 347.80 ms. Allocated memory is still 151.0 MB. Free memory was 126.1 MB in the beginning and 116.6 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.23 ms. Allocated memory is still 151.0 MB. Free memory was 116.6 MB in the beginning and 115.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 463.47 ms. Allocated memory is still 151.0 MB. Free memory was 115.2 MB in the beginning and 131.5 MB in the end (delta: -16.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1093.43 ms. Allocated memory is still 151.0 MB. Free memory was 131.5 MB in the beginning and 86.9 MB in the end (delta: 44.6 MB). Peak memory consumption was 44.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 19]: 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: [L25] int x,y; [L26] x = -50 [L27] y = __VERIFIER_nondet_int() [L28] COND FALSE !(!(-1000 < y && y < 1000000)) [L29] COND TRUE x < 0 [L30] x = x + y [L31] y++ [L29] COND FALSE !(x < 0) [L33] CALL __VERIFIER_assert(y > 0) [L18] COND TRUE !(cond) [L19] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 47 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 1.0s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 34 SDtfs, 28 SDslu, 18 SDs, 0 SdLazy, 26 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred 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, 1 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...