/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/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/psyco/psyco_security.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 21:12:45,972 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 21:12:45,976 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 21:12:46,015 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-21 21:12:46,015 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-21 21:12:46,017 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-21 21:12:46,018 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-21 21:12:46,021 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-21 21:12:46,023 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-21 21:12:46,024 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-21 21:12:46,025 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-21 21:12:46,026 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-21 21:12:46,027 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 21:12:46,028 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 21:12:46,029 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 21:12:46,045 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 21:12:46,046 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 21:12:46,047 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 21:12:46,049 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 21:12:46,051 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 21:12:46,053 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 21:12:46,054 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 21:12:46,055 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 21:12:46,056 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 21:12:46,059 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-21 21:12:46,059 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-21 21:12:46,059 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-21 21:12:46,060 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-21 21:12:46,061 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-21 21:12:46,062 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-21 21:12:46,062 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-21 21:12:46,063 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-21 21:12:46,064 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-21 21:12:46,065 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-21 21:12:46,066 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-21 21:12:46,066 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-21 21:12:46,067 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-21 21:12:46,067 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-21 21:12:46,068 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 21:12:46,069 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 21:12:46,069 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 21:12:46,072 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-21 21:12:46,083 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 21:12:46,083 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 21:12:46,085 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 21:12:46,085 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 21:12:46,085 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 21:12:46,085 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 21:12:46,086 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 21:12:46,086 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 21:12:46,086 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 21:12:46,086 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 21:12:46,086 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 21:12:46,087 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 21:12:46,087 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 21:12:46,087 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 21:12:46,087 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 21:12:46,087 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 21:12:46,088 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 21:12:46,088 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 21:12:46,088 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 21:12:46,088 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 21:12:46,088 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 21:12:46,089 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 21:12:46,089 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 21:12:46,468 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 21:12:46,494 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 21:12:46,497 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 21:12:46,498 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 21:12:46,499 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 21:12:46,500 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/psyco/psyco_security.c [2021-02-21 21:12:46,581 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d77f7acc/715e4b924e11400a89b2f01296d76f0a/FLAG667dbd410 [2021-02-21 21:12:47,177 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 21:12:47,177 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/psyco/psyco_security.c [2021-02-21 21:12:47,192 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d77f7acc/715e4b924e11400a89b2f01296d76f0a/FLAG667dbd410 [2021-02-21 21:12:47,554 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d77f7acc/715e4b924e11400a89b2f01296d76f0a [2021-02-21 21:12:47,557 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 21:12:47,574 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 21:12:47,577 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 21:12:47,578 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 21:12:47,581 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 21:12:47,582 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:12:47" (1/1) ... [2021-02-21 21:12:47,584 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d046402 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:12:47, skipping insertion in model container [2021-02-21 21:12:47,584 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:12:47" (1/1) ... [2021-02-21 21:12:47,593 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 21:12:47,647 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 21:12:47,901 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/psyco/psyco_security.c[12744,12757] [2021-02-21 21:12:47,906 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:12:47,915 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 21:12:47,950 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/psyco/psyco_security.c[12744,12757] [2021-02-21 21:12:47,952 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:12:47,968 INFO L208 MainTranslator]: Completed translation [2021-02-21 21:12:47,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:12:47 WrapperNode [2021-02-21 21:12:47,968 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 21:12:47,970 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 21:12:47,970 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 21:12:47,970 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 21:12:47,983 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:12:47" (1/1) ... [2021-02-21 21:12:47,984 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:12:47" (1/1) ... [2021-02-21 21:12:47,992 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:12:47" (1/1) ... [2021-02-21 21:12:47,993 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:12:47" (1/1) ... [2021-02-21 21:12:48,003 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:12:47" (1/1) ... [2021-02-21 21:12:48,013 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:12:47" (1/1) ... [2021-02-21 21:12:48,015 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:12:47" (1/1) ... [2021-02-21 21:12:48,019 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 21:12:48,020 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 21:12:48,020 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 21:12:48,020 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 21:12:48,021 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:12:47" (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 [2021-02-21 21:12:48,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 21:12:48,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 21:12:48,120 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 21:12:48,120 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 21:12:48,120 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-21 21:12:48,120 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 21:12:48,120 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 21:12:48,121 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 21:12:48,121 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 21:12:48,121 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 21:12:48,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 21:12:48,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 21:12:48,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 21:12:48,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 21:12:48,122 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 21:12:48,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 21:12:48,716 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 21:12:48,716 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-02-21 21:12:48,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:12:48 BoogieIcfgContainer [2021-02-21 21:12:48,718 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 21:12:48,720 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 21:12:48,720 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 21:12:48,723 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 21:12:48,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 09:12:47" (1/3) ... [2021-02-21 21:12:48,724 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c4174d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:12:48, skipping insertion in model container [2021-02-21 21:12:48,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:12:47" (2/3) ... [2021-02-21 21:12:48,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c4174d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:12:48, skipping insertion in model container [2021-02-21 21:12:48,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:12:48" (3/3) ... [2021-02-21 21:12:48,727 INFO L111 eAbstractionObserver]: Analyzing ICFG psyco_security.c [2021-02-21 21:12:48,733 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 21:12:48,738 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 21:12:48,756 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 21:12:48,779 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 21:12:48,779 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 21:12:48,779 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 21:12:48,779 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 21:12:48,779 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 21:12:48,780 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 21:12:48,780 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 21:12:48,780 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 21:12:48,800 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states. [2021-02-21 21:12:48,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-21 21:12:48,810 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:12:48,811 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] [2021-02-21 21:12:48,811 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:12:48,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:12:48,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1599487208, now seen corresponding path program 1 times [2021-02-21 21:12:48,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:12:48,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [125646735] [2021-02-21 21:12:48,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:12:48,894 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:12:48,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:12:49,020 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:49,021 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:12:49,022 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:49,023 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:12:49,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:12:49,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:12:49,141 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:49,142 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:12:49,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:12:49,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [125646735] [2021-02-21 21:12:49,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:12:49,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-21 21:12:49,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369154629] [2021-02-21 21:12:49,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-21 21:12:49,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:12:49,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-21 21:12:49,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-21 21:12:49,196 INFO L87 Difference]: Start difference. First operand 200 states. Second operand 3 states. [2021-02-21 21:12:49,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:12:49,422 INFO L93 Difference]: Finished difference Result 378 states and 516 transitions. [2021-02-21 21:12:49,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-21 21:12:49,426 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2021-02-21 21:12:49,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:12:49,445 INFO L225 Difference]: With dead ends: 378 [2021-02-21 21:12:49,445 INFO L226 Difference]: Without dead ends: 186 [2021-02-21 21:12:49,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-21 21:12:49,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-02-21 21:12:49,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2021-02-21 21:12:49,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2021-02-21 21:12:49,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 221 transitions. [2021-02-21 21:12:49,567 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 221 transitions. Word has length 30 [2021-02-21 21:12:49,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:12:49,568 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 221 transitions. [2021-02-21 21:12:49,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-21 21:12:49,568 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 221 transitions. [2021-02-21 21:12:49,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-21 21:12:49,570 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:12:49,570 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] [2021-02-21 21:12:49,571 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 21:12:49,571 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:12:49,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:12:49,572 INFO L82 PathProgramCache]: Analyzing trace with hash 869436777, now seen corresponding path program 1 times [2021-02-21 21:12:49,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:12:49,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546815639] [2021-02-21 21:12:49,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:12:49,576 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:12:49,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:12:49,623 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:49,623 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:12:49,624 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:49,625 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:12:49,630 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:49,631 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:12:49,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:12:49,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:12:49,721 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:49,722 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:12:49,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:12:49,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546815639] [2021-02-21 21:12:49,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:12:49,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 21:12:49,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650356377] [2021-02-21 21:12:49,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 21:12:49,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:12:49,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 21:12:49,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 21:12:49,731 INFO L87 Difference]: Start difference. First operand 186 states and 221 transitions. Second operand 4 states. [2021-02-21 21:12:50,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:12:50,267 INFO L93 Difference]: Finished difference Result 354 states and 425 transitions. [2021-02-21 21:12:50,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 21:12:50,267 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2021-02-21 21:12:50,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:12:50,270 INFO L225 Difference]: With dead ends: 354 [2021-02-21 21:12:50,270 INFO L226 Difference]: Without dead ends: 189 [2021-02-21 21:12:50,273 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 [2021-02-21 21:12:50,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-02-21 21:12:50,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2021-02-21 21:12:50,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2021-02-21 21:12:50,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 224 transitions. [2021-02-21 21:12:50,320 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 224 transitions. Word has length 31 [2021-02-21 21:12:50,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:12:50,321 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 224 transitions. [2021-02-21 21:12:50,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 21:12:50,321 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 224 transitions. [2021-02-21 21:12:50,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-02-21 21:12:50,323 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:12:50,323 INFO L422 BasicCegarLoop]: trace histogram [2, 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] [2021-02-21 21:12:50,323 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 21:12:50,323 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:12:50,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:12:50,324 INFO L82 PathProgramCache]: Analyzing trace with hash -625938074, now seen corresponding path program 1 times [2021-02-21 21:12:50,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:12:50,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [220335770] [2021-02-21 21:12:50,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:12:50,409 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:50,430 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 63 [2021-02-21 21:12:50,461 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:50,464 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 67 [2021-02-21 21:12:50,465 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-21 21:12:50,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:12:50,528 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:50,528 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:12:50,529 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:50,530 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:12:50,534 WARN L141 QuantifierPusher]: treesize reduction 8, result has 46.7 percent of original size [2021-02-21 21:12:50,535 WARN L147 QuantifierPusher]: treesize reduction 8, result has 46.7 percent of original size 7 [2021-02-21 21:12:50,541 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:50,542 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:12:50,543 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:50,543 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:12:50,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:12:50,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:12:50,592 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:50,593 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:12:50,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:12:50,603 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:50,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:12:50,612 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:50,615 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-21 21:12:50,617 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 64 [2021-02-21 21:12:50,620 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:50,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:12:50,623 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:50,628 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-02-21 21:12:50,630 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 72 [2021-02-21 21:12:50,689 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:50,691 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-02-21 21:12:50,692 WARN L141 QuantifierPusher]: treesize reduction 36, result has 7.7 percent of original size [2021-02-21 21:12:50,692 WARN L147 QuantifierPusher]: treesize reduction 36, result has 7.7 percent of original size 3 [2021-02-21 21:12:50,694 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:50,697 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-21 21:12:50,710 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:50,711 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-21 21:12:50,724 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:50,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:12:50,727 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:50,728 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:12:50,729 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-21 21:12:50,734 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:50,735 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:12:50,744 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:50,745 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:12:50,745 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:50,746 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-21 21:12:50,757 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:50,757 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:12:50,770 WARN L141 QuantifierPusher]: treesize reduction 10, result has 9.1 percent of original size [2021-02-21 21:12:50,771 WARN L147 QuantifierPusher]: treesize reduction 10, result has 9.1 percent of original size 1 [2021-02-21 21:12:50,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [220335770] [2021-02-21 21:12:50,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:12:50,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-02-21 21:12:50,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936973520] [2021-02-21 21:12:50,772 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-21 21:12:50,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:12:50,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-21 21:12:50,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-02-21 21:12:50,774 INFO L87 Difference]: Start difference. First operand 189 states and 224 transitions. Second operand 11 states. [2021-02-21 21:12:52,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:12:52,003 INFO L93 Difference]: Finished difference Result 367 states and 442 transitions. [2021-02-21 21:12:52,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-21 21:12:52,004 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2021-02-21 21:12:52,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:12:52,006 INFO L225 Difference]: With dead ends: 367 [2021-02-21 21:12:52,006 INFO L226 Difference]: Without dead ends: 200 [2021-02-21 21:12:52,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-02-21 21:12:52,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-02-21 21:12:52,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 190. [2021-02-21 21:12:52,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2021-02-21 21:12:52,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 226 transitions. [2021-02-21 21:12:52,055 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 226 transitions. Word has length 40 [2021-02-21 21:12:52,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:12:52,056 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 226 transitions. [2021-02-21 21:12:52,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-21 21:12:52,056 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 226 transitions. [2021-02-21 21:12:52,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-21 21:12:52,058 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:12:52,058 INFO L422 BasicCegarLoop]: trace histogram [2, 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] [2021-02-21 21:12:52,058 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 21:12:52,058 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:12:52,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:12:52,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1084579848, now seen corresponding path program 1 times [2021-02-21 21:12:52,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:12:52,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164480695] [2021-02-21 21:12:52,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:12:52,093 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:52,096 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 63 [2021-02-21 21:12:52,146 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:52,150 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 67 [2021-02-21 21:12:52,151 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-21 21:12:52,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 21:12:52,197 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 21:12:52,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 21:12:52,237 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 21:12:52,269 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-21 21:12:52,269 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-21 21:12:52,270 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 21:12:52,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 09:12:52 BoogieIcfgContainer [2021-02-21 21:12:52,288 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 21:12:52,290 INFO L168 Benchmark]: Toolchain (without parser) took 4728.08 ms. Allocated memory was 153.1 MB in the beginning and 226.5 MB in the end (delta: 73.4 MB). Free memory was 128.1 MB in the beginning and 197.5 MB in the end (delta: -69.4 MB). Peak memory consumption was 6.3 MB. Max. memory is 8.0 GB. [2021-02-21 21:12:52,291 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 153.1 MB. Free memory is still 126.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 21:12:52,291 INFO L168 Benchmark]: CACSL2BoogieTranslator took 391.59 ms. Allocated memory is still 153.1 MB. Free memory was 127.0 MB in the beginning and 115.3 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-02-21 21:12:52,292 INFO L168 Benchmark]: Boogie Preprocessor took 49.72 ms. Allocated memory is still 153.1 MB. Free memory was 115.3 MB in the beginning and 113.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-21 21:12:52,293 INFO L168 Benchmark]: RCFGBuilder took 698.16 ms. Allocated memory is still 153.1 MB. Free memory was 113.3 MB in the beginning and 110.8 MB in the end (delta: 2.4 MB). Peak memory consumption was 19.6 MB. Max. memory is 8.0 GB. [2021-02-21 21:12:52,294 INFO L168 Benchmark]: TraceAbstraction took 3568.45 ms. Allocated memory was 153.1 MB in the beginning and 226.5 MB in the end (delta: 73.4 MB). Free memory was 110.3 MB in the beginning and 197.5 MB in the end (delta: -87.2 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 21:12:52,297 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 153.1 MB. Free memory is still 126.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 391.59 ms. Allocated memory is still 153.1 MB. Free memory was 127.0 MB in the beginning and 115.3 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 49.72 ms. Allocated memory is still 153.1 MB. Free memory was 115.3 MB in the beginning and 113.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 698.16 ms. Allocated memory is still 153.1 MB. Free memory was 113.3 MB in the beginning and 110.8 MB in the end (delta: 2.4 MB). Peak memory consumption was 19.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3568.45 ms. Allocated memory was 153.1 MB in the beginning and 226.5 MB in the end (delta: 73.4 MB). Free memory was 110.3 MB in the beginning and 197.5 MB in the end (delta: -87.2 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 391]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L7] int m_initSign = 1; [L8] int m_initVerify = 2; [L9] int m_Signature = 3; [L10] int m_sign = 4; [L11] int m_verify = 5; [L12] int m_update = 6; [L17] int q = 0; [L18] int method_id; [L21] int this_state = 0; [L24] COND TRUE 1 [L29] COND TRUE q == 0 [L30] COND TRUE __VERIFIER_nondet_int() [L34] method_id = 3 [L36] COND FALSE !(0) [L40] q = 2 [L42] this_state=0 [L24] COND TRUE 1 [L29] COND FALSE !(q == 0) [L49] COND FALSE !(q == 1) [L101] COND TRUE q == 2 [L102] COND FALSE !(__VERIFIER_nondet_int()) [L118] COND FALSE !(__VERIFIER_nondet_int()) [L134] COND TRUE __VERIFIER_nondet_int() [L138] method_id = 4 [L140] COND TRUE (this_state == 2) [L391] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 203 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.4s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 650 SDtfs, 888 SDslu, 118 SDs, 0 SdLazy, 1124 SolverSat, 23 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=200occurred 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: 0.1s AutomataMinimizationTime, 3 MinimizatonAttempts, 10 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...