/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/test06.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-22 01:57:02,671 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 01:57:02,674 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 01:57:02,709 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-22 01:57:02,800 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-22 01:57:02,801 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-22 01:57:02,802 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-22 01:57:02,804 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 01:57:02,828 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 01:57:02,829 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 01:57:02,834 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 01:57:02,834 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 01:57:02,835 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 01:57:02,835 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 01:57:02,835 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 01:57:02,835 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 01:57:02,835 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 01:57:02,836 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 01:57:02,837 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 01:57:02,837 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 01:57:02,837 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 01:57:02,838 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 01:57:02,838 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 01:57:02,838 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 01:57:02,838 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 01:57:02,838 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 01:57:02,839 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 01:57:02,839 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 01:57:02,839 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 01:57:02,839 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 01:57:02,840 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 01:57:02,840 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 01:57:03,257 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 01:57:03,289 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 01:57:03,292 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 01:57:03,293 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 01:57:03,294 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 01:57:03,295 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test06.c [2021-02-22 01:57:03,368 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fc27f626/7a18f25769954d64854af9a97f90b9a4/FLAGbbf84bc34 [2021-02-22 01:57:03,926 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 01:57:03,926 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test06.c [2021-02-22 01:57:03,933 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fc27f626/7a18f25769954d64854af9a97f90b9a4/FLAGbbf84bc34 [2021-02-22 01:57:04,292 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fc27f626/7a18f25769954d64854af9a97f90b9a4 [2021-02-22 01:57:04,302 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 01:57:04,321 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 01:57:04,328 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 01:57:04,328 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 01:57:04,332 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 01:57:04,333 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 01:57:04" (1/1) ... [2021-02-22 01:57:04,335 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c79e054 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:04, skipping insertion in model container [2021-02-22 01:57:04,336 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 01:57:04" (1/1) ... [2021-02-22 01:57:04,345 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 01:57:04,366 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 01:57:04,588 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/test06.c[670,683] [2021-02-22 01:57:04,594 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 01:57:04,609 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 01:57:04,629 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/test06.c[670,683] [2021-02-22 01:57:04,630 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 01:57:04,649 INFO L208 MainTranslator]: Completed translation [2021-02-22 01:57:04,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:04 WrapperNode [2021-02-22 01:57:04,650 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 01:57:04,651 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 01:57:04,651 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 01:57:04,651 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 01:57:04,666 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:04" (1/1) ... [2021-02-22 01:57:04,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:04" (1/1) ... [2021-02-22 01:57:04,676 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:04" (1/1) ... [2021-02-22 01:57:04,676 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:04" (1/1) ... [2021-02-22 01:57:04,685 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:04" (1/1) ... [2021-02-22 01:57:04,688 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:04" (1/1) ... [2021-02-22 01:57:04,690 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:04" (1/1) ... [2021-02-22 01:57:04,693 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 01:57:04,694 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 01:57:04,694 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 01:57:04,694 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 01:57:04,697 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:04" (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 01:57:04,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 01:57:04,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 01:57:04,808 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 01:57:04,808 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2021-02-22 01:57:04,808 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-02-22 01:57:04,808 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 01:57:04,809 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 01:57:04,809 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 01:57:04,809 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 01:57:04,809 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 01:57:04,809 INFO L130 BoogieDeclarations]: Found specification of procedure g [2021-02-22 01:57:04,810 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-02-22 01:57:04,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-02-22 01:57:04,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 01:57:04,810 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-02-22 01:57:04,811 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 01:57:04,811 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 01:57:04,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 01:57:04,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 01:57:04,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 01:57:04,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 01:57:05,359 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 01:57:05,359 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-22 01:57:05,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 01:57:05 BoogieIcfgContainer [2021-02-22 01:57:05,361 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 01:57:05,363 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 01:57:05,363 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 01:57:05,367 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 01:57:05,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 01:57:04" (1/3) ... [2021-02-22 01:57:05,368 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@479e4c05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 01:57:05, skipping insertion in model container [2021-02-22 01:57:05,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:04" (2/3) ... [2021-02-22 01:57:05,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@479e4c05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 01:57:05, skipping insertion in model container [2021-02-22 01:57:05,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 01:57:05" (3/3) ... [2021-02-22 01:57:05,371 INFO L111 eAbstractionObserver]: Analyzing ICFG test06.c [2021-02-22 01:57:05,378 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 01:57:05,384 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 01:57:05,401 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 01:57:05,426 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 01:57:05,426 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 01:57:05,426 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 01:57:05,426 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 01:57:05,427 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 01:57:05,427 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 01:57:05,427 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 01:57:05,427 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 01:57:05,444 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states. [2021-02-22 01:57:05,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-22 01:57:05,455 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:57:05,456 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] [2021-02-22 01:57:05,457 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:57:05,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:57:05,463 INFO L82 PathProgramCache]: Analyzing trace with hash -540717432, now seen corresponding path program 1 times [2021-02-22 01:57:05,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:57:05,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1577087383] [2021-02-22 01:57:05,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:57:05,557 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:57:05,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:57:05,943 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:05,944 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:57:05,946 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:05,948 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:57:05,976 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:05,977 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:57:05,995 WARN L141 QuantifierPusher]: treesize reduction 8, result has 27.3 percent of original size [2021-02-22 01:57:05,997 WARN L147 QuantifierPusher]: treesize reduction 8, result has 27.3 percent of original size 3 [2021-02-22 01:57:06,011 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:06,012 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:57:06,025 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:06,027 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:57:06,040 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:06,041 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:57:06,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:57:06,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:57:06,130 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:06,130 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:57:06,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-02-22 01:57:06,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:57:06,161 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:06,162 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:57:06,175 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:06,176 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 01:57:06,199 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 01:57:06,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1577087383] [2021-02-22 01:57:06,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:57:06,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-02-22 01:57:06,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903500504] [2021-02-22 01:57:06,210 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-22 01:57:06,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:57:06,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-22 01:57:06,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-02-22 01:57:06,229 INFO L87 Difference]: Start difference. First operand 83 states. Second operand 11 states. [2021-02-22 01:57:06,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:57:06,916 INFO L93 Difference]: Finished difference Result 111 states and 112 transitions. [2021-02-22 01:57:06,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-22 01:57:06,918 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2021-02-22 01:57:06,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:57:06,929 INFO L225 Difference]: With dead ends: 111 [2021-02-22 01:57:06,929 INFO L226 Difference]: Without dead ends: 57 [2021-02-22 01:57:06,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-02-22 01:57:06,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-02-22 01:57:06,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-02-22 01:57:06,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-02-22 01:57:06,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 56 transitions. [2021-02-22 01:57:06,990 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 56 transitions. Word has length 44 [2021-02-22 01:57:06,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:57:06,991 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 56 transitions. [2021-02-22 01:57:06,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-22 01:57:06,991 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 56 transitions. [2021-02-22 01:57:06,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-02-22 01:57:06,993 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:57:06,994 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 01:57:06,994 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 01:57:06,994 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:57:06,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:57:06,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1846319629, now seen corresponding path program 1 times [2021-02-22 01:57:06,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:57:06,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273705674] [2021-02-22 01:57:06,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:57:07,000 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:57:07,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 01:57:07,112 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 01:57:07,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 01:57:07,169 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 01:57:07,215 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-22 01:57:07,216 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-22 01:57:07,217 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-22 01:57:07,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.02 01:57:07 BoogieIcfgContainer [2021-02-22 01:57:07,235 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-22 01:57:07,237 INFO L168 Benchmark]: Toolchain (without parser) took 2931.62 ms. Allocated memory was 151.0 MB in the beginning and 187.7 MB in the end (delta: 36.7 MB). Free memory was 127.9 MB in the beginning and 145.9 MB in the end (delta: -18.1 MB). Peak memory consumption was 19.2 MB. Max. memory is 8.0 GB. [2021-02-22 01:57:07,238 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 124.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 01:57:07,239 INFO L168 Benchmark]: CACSL2BoogieTranslator took 322.27 ms. Allocated memory is still 151.0 MB. Free memory was 126.6 MB in the beginning and 117.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-22 01:57:07,240 INFO L168 Benchmark]: Boogie Preprocessor took 42.21 ms. Allocated memory is still 151.0 MB. Free memory was 117.0 MB in the beginning and 115.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-22 01:57:07,241 INFO L168 Benchmark]: RCFGBuilder took 667.47 ms. Allocated memory is still 151.0 MB. Free memory was 115.5 MB in the beginning and 124.9 MB in the end (delta: -9.4 MB). Peak memory consumption was 17.7 MB. Max. memory is 8.0 GB. [2021-02-22 01:57:07,242 INFO L168 Benchmark]: TraceAbstraction took 1872.55 ms. Allocated memory was 151.0 MB in the beginning and 187.7 MB in the end (delta: 36.7 MB). Free memory was 124.3 MB in the beginning and 145.9 MB in the end (delta: -21.6 MB). Peak memory consumption was 15.1 MB. Max. memory is 8.0 GB. [2021-02-22 01:57:07,246 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 124.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 322.27 ms. Allocated memory is still 151.0 MB. Free memory was 126.6 MB in the beginning and 117.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 42.21 ms. Allocated memory is still 151.0 MB. Free memory was 117.0 MB in the beginning and 115.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 667.47 ms. Allocated memory is still 151.0 MB. Free memory was 115.5 MB in the beginning and 124.9 MB in the end (delta: -9.4 MB). Peak memory consumption was 17.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1872.55 ms. Allocated memory was 151.0 MB in the beginning and 187.7 MB in the end (delta: 36.7 MB). Free memory was 124.3 MB in the beginning and 145.9 MB in the end (delta: -21.6 MB). Peak memory consumption was 15.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 42]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L23] int a, b; [L24] int *p1, *p2; [L26] p1 = &a [L27] p2 = &b [L29] b = 1 [L30] a = 5 [L32] EXPR \read(a) [L32] a-- [L34] EXPR \read(a) [L34] CALL, EXPR f(a, &p1, &p2) [L14] COND TRUE a == 4 [L15] CALL g(p1, p2) [L7] EXPR \read(**p2) [L7] int *pq = *p2; [L9] EXPR \read(**p2) [L9] *p1 = *p2 [L10] *pq = 0 [L15] RET g(p1, p2) [L16] return 1; [L34] RET, EXPR f(a, &p1, &p2) [L34] a = f(a, &p1, &p2) [L36] EXPR \read(*p1) [L36] COND TRUE *p1 == 0 [L42] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 86 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.7s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 58 SDtfs, 56 SDslu, 263 SDs, 0 SdLazy, 329 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=83occurred 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...