/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/ldv-regression/test08.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 04:22:13,520 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 04:22:13,525 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 04:22:13,595 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 04:22:13,640 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 04:22:13,647 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 04:22:13,649 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 04:22:13,651 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 04:22:13,655 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 04:22:13,657 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 04:22:13,664 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 04:22:13,670 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 04:22:13,673 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 04:22:13,675 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 04:22:13,677 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 04:22:13,680 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 04:22:13,688 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-24 04:22:13,704 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 04:22:13,729 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 04:22:13,730 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 04:22:13,736 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 04:22:13,736 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 04:22:13,736 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 04:22:13,736 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 04:22:13,737 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 04:22:13,737 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 04:22:13,737 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 04:22:13,737 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 04:22:13,739 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 04:22:13,739 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 04:22:13,739 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 04:22:13,740 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 04:22:13,740 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 04:22:13,740 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 04:22:13,740 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 04:22:13,741 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 04:22:13,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 04:22:13,741 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 04:22:13,741 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 04:22:13,741 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 04:22:13,742 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-24 04:22:13,742 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-24 04:22:14,275 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 04:22:14,312 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 04:22:14,315 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 04:22:14,317 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 04:22:14,318 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 04:22:14,319 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test08.c [2021-02-24 04:22:14,421 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b6526430/156b00dc1a8b46bcbcdeb484b9006f31/FLAG536ccc321 [2021-02-24 04:22:15,215 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 04:22:15,216 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test08.c [2021-02-24 04:22:15,223 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b6526430/156b00dc1a8b46bcbcdeb484b9006f31/FLAG536ccc321 [2021-02-24 04:22:15,561 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b6526430/156b00dc1a8b46bcbcdeb484b9006f31 [2021-02-24 04:22:15,564 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 04:22:15,576 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 04:22:15,578 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 04:22:15,578 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 04:22:15,582 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 04:22:15,583 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:22:15" (1/1) ... [2021-02-24 04:22:15,584 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2633761f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:22:15, skipping insertion in model container [2021-02-24 04:22:15,584 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:22:15" (1/1) ... [2021-02-24 04:22:15,592 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 04:22:15,608 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 04:22:15,771 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test08.c[578,591] [2021-02-24 04:22:15,775 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:22:15,786 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 04:22:15,806 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test08.c[578,591] [2021-02-24 04:22:15,807 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:22:15,827 INFO L208 MainTranslator]: Completed translation [2021-02-24 04:22:15,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:22:15 WrapperNode [2021-02-24 04:22:15,828 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 04:22:15,830 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 04:22:15,830 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 04:22:15,831 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 04:22:15,847 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:22:15" (1/1) ... [2021-02-24 04:22:15,847 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:22:15" (1/1) ... [2021-02-24 04:22:15,855 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:22:15" (1/1) ... [2021-02-24 04:22:15,856 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:22:15" (1/1) ... [2021-02-24 04:22:15,862 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:22:15" (1/1) ... [2021-02-24 04:22:15,865 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:22:15" (1/1) ... [2021-02-24 04:22:15,866 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:22:15" (1/1) ... [2021-02-24 04:22:15,868 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 04:22:15,869 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 04:22:15,869 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 04:22:15,870 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 04:22:15,870 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:22:15" (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 04:22:15,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 04:22:15,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 04:22:15,987 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 04:22:15,988 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-02-24 04:22:15,988 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 04:22:15,988 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 04:22:15,988 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 04:22:15,989 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 04:22:15,989 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 04:22:15,989 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-02-24 04:22:15,989 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 04:22:15,990 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 04:22:15,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 04:22:15,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 04:22:15,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 04:22:15,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 04:22:15,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 04:22:16,402 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 04:22:16,403 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-24 04:22:16,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:22:16 BoogieIcfgContainer [2021-02-24 04:22:16,405 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 04:22:16,425 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 04:22:16,425 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 04:22:16,431 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 04:22:16,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 04:22:15" (1/3) ... [2021-02-24 04:22:16,433 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2aea6748 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:22:16, skipping insertion in model container [2021-02-24 04:22:16,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:22:15" (2/3) ... [2021-02-24 04:22:16,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2aea6748 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:22:16, skipping insertion in model container [2021-02-24 04:22:16,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:22:16" (3/3) ... [2021-02-24 04:22:16,437 INFO L111 eAbstractionObserver]: Analyzing ICFG test08.c [2021-02-24 04:22:16,448 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 04:22:16,454 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 04:22:16,480 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 04:22:16,517 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 04:22:16,518 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 04:22:16,518 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-24 04:22:16,518 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 04:22:16,518 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 04:22:16,518 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 04:22:16,519 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 04:22:16,519 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 04:22:16,547 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states. [2021-02-24 04:22:16,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-02-24 04:22:16,560 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:22:16,561 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:22:16,562 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:22:16,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:22:16,574 INFO L82 PathProgramCache]: Analyzing trace with hash 775193509, now seen corresponding path program 1 times [2021-02-24 04:22:16,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:22:16,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1044018531] [2021-02-24 04:22:16,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:22:16,700 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:22:16,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:22:16,971 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:22:16,973 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:22:17,003 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:22:17,008 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-24 04:22:17,057 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:22:17,059 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-24 04:22:17,092 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:22:17,095 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:22:17,119 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:22:17,120 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:22:17,123 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:22:17,125 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:22:17,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:22:17,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:22:17,354 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:22:17,355 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:22:17,358 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:22:17,358 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 04:22:17,370 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:22:17,371 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:22:17,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-02-24 04:22:17,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:22:17,404 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:22:17,405 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:22:17,429 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 04:22:17,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1044018531] [2021-02-24 04:22:17,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:22:17,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-24 04:22:17,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340096434] [2021-02-24 04:22:17,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-24 04:22:17,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:22:17,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-24 04:22:17,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-02-24 04:22:17,458 INFO L87 Difference]: Start difference. First operand 57 states. Second operand 10 states. [2021-02-24 04:22:18,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:22:18,018 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2021-02-24 04:22:18,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-24 04:22:18,021 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 46 [2021-02-24 04:22:18,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:22:18,034 INFO L225 Difference]: With dead ends: 77 [2021-02-24 04:22:18,034 INFO L226 Difference]: Without dead ends: 48 [2021-02-24 04:22:18,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-02-24 04:22:18,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-02-24 04:22:18,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-02-24 04:22:18,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-02-24 04:22:18,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 47 transitions. [2021-02-24 04:22:18,130 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 47 transitions. Word has length 46 [2021-02-24 04:22:18,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:22:18,134 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 47 transitions. [2021-02-24 04:22:18,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-24 04:22:18,134 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 47 transitions. [2021-02-24 04:22:18,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-24 04:22:18,138 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:22:18,138 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:22:18,139 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 04:22:18,139 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:22:18,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:22:18,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1026799709, now seen corresponding path program 1 times [2021-02-24 04:22:18,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:22:18,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1363748045] [2021-02-24 04:22:18,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:22:18,152 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:22:18,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 04:22:18,239 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 04:22:18,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 04:22:18,304 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 04:22:18,342 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-24 04:22:18,342 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-24 04:22:18,343 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 04:22:18,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 04:22:18 BoogieIcfgContainer [2021-02-24 04:22:18,365 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 04:22:18,368 INFO L168 Benchmark]: Toolchain (without parser) took 2800.84 ms. Allocated memory was 158.3 MB in the beginning and 190.8 MB in the end (delta: 32.5 MB). Free memory was 135.6 MB in the beginning and 124.4 MB in the end (delta: 11.1 MB). Peak memory consumption was 44.9 MB. Max. memory is 8.0 GB. [2021-02-24 04:22:18,368 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 158.3 MB. Free memory is still 131.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 04:22:18,370 INFO L168 Benchmark]: CACSL2BoogieTranslator took 251.33 ms. Allocated memory is still 158.3 MB. Free memory was 134.5 MB in the beginning and 125.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-24 04:22:18,371 INFO L168 Benchmark]: Boogie Preprocessor took 38.30 ms. Allocated memory is still 158.3 MB. Free memory was 124.9 MB in the beginning and 123.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-24 04:22:18,372 INFO L168 Benchmark]: RCFGBuilder took 535.51 ms. Allocated memory is still 158.3 MB. Free memory was 123.4 MB in the beginning and 106.0 MB in the end (delta: 17.4 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-02-24 04:22:18,373 INFO L168 Benchmark]: TraceAbstraction took 1940.82 ms. Allocated memory was 158.3 MB in the beginning and 190.8 MB in the end (delta: 32.5 MB). Free memory was 141.8 MB in the beginning and 124.4 MB in the end (delta: 17.4 MB). Peak memory consumption was 50.2 MB. Max. memory is 8.0 GB. [2021-02-24 04:22:18,376 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 158.3 MB. Free memory is still 131.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 251.33 ms. Allocated memory is still 158.3 MB. Free memory was 134.5 MB in the beginning and 125.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.30 ms. Allocated memory is still 158.3 MB. Free memory was 124.9 MB in the beginning and 123.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 535.51 ms. Allocated memory is still 158.3 MB. Free memory was 123.4 MB in the beginning and 106.0 MB in the end (delta: 17.4 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1940.82 ms. Allocated memory was 158.3 MB in the beginning and 190.8 MB in the end (delta: 32.5 MB). Free memory was 141.8 MB in the beginning and 124.4 MB in the end (delta: 17.4 MB). Peak memory consumption was 50.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 38]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L6] int a, b; [L7] int *p1, *p2; [L21] p1 = &a [L22] p2 = &b [L24] b = 1 [L25] a = 5 [L27] EXPR \read(a) [L27] a-- [L29] CALL, EXPR f() [L10] EXPR \read(*p1) [L10] EXPR \read(*p2) [L10] EXPR \read(a) [L10] int v = *p1 + *p2 - a; [L11] COND TRUE v == 1 [L12] p1 = p2 [L13] return v; [L29] RET, EXPR f() [L29] a = f() [L31] EXPR \read(a) [L31] COND TRUE a && p1 == p2 [L38] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 60 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.8s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 38 SDtfs, 150 SDslu, 87 SDs, 0 SdLazy, 88 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred 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, 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 proved your program to be incorrect! Received shutdown request...