/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/psyco/psyco_security.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 04:42:50,937 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 04:42:50,942 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 04:42:50,983 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-24 04:42:50,984 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-24 04:42:50,985 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-24 04:42:50,987 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-24 04:42:50,989 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-24 04:42:50,991 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-24 04:42:50,993 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-24 04:42:50,994 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-24 04:42:50,995 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-24 04:42:50,996 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 04:42:50,997 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 04:42:50,998 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 04:42:51,000 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 04:42:51,001 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 04:42:51,002 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 04:42:51,004 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 04:42:51,007 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 04:42:51,009 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 04:42:51,011 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 04:42:51,012 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 04:42:51,013 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 04:42:51,030 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-24 04:42:51,040 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-24 04:42:51,041 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-24 04:42:51,042 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-24 04:42:51,043 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 04:42:51,060 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 04:42:51,061 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 04:42:51,062 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 04:42:51,062 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 04:42:51,063 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 04:42:51,063 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 04:42:51,063 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 04:42:51,063 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 04:42:51,063 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 04:42:51,064 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 04:42:51,064 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 04:42:51,067 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 04:42:51,067 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 04:42:51,068 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 04:42:51,068 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 04:42:51,068 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 04:42:51,068 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 04:42:51,068 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 04:42:51,069 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 04:42:51,069 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 04:42:51,069 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 04:42:51,069 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 04:42:51,069 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-24 04:42:51,070 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-24 04:42:51,458 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 04:42:51,482 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 04:42:51,485 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 04:42:51,487 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 04:42:51,492 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 04:42:51,493 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/psyco/psyco_security.c [2021-02-24 04:42:51,578 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0791dfd5f/ce22974546d1488d849325554882e2aa/FLAGabb7b646d [2021-02-24 04:42:52,255 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 04:42:52,256 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/psyco/psyco_security.c [2021-02-24 04:42:52,271 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0791dfd5f/ce22974546d1488d849325554882e2aa/FLAGabb7b646d [2021-02-24 04:42:52,621 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0791dfd5f/ce22974546d1488d849325554882e2aa [2021-02-24 04:42:52,626 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 04:42:52,642 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 04:42:52,648 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 04:42:52,648 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 04:42:52,652 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 04:42:52,653 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:42:52" (1/1) ... [2021-02-24 04:42:52,655 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a44426c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:42:52, skipping insertion in model container [2021-02-24 04:42:52,655 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:42:52" (1/1) ... [2021-02-24 04:42:52,664 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 04:42:52,720 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 04:42:53,006 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] [2021-02-24 04:42:53,012 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:42:53,034 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 04:42:53,071 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] [2021-02-24 04:42:53,072 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:42:53,088 INFO L208 MainTranslator]: Completed translation [2021-02-24 04:42:53,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:42:53 WrapperNode [2021-02-24 04:42:53,089 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 04:42:53,090 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 04:42:53,090 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 04:42:53,090 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 04:42:53,104 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:42:53" (1/1) ... [2021-02-24 04:42:53,105 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:42:53" (1/1) ... [2021-02-24 04:42:53,114 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:42:53" (1/1) ... [2021-02-24 04:42:53,114 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:42:53" (1/1) ... [2021-02-24 04:42:53,125 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:42:53" (1/1) ... [2021-02-24 04:42:53,136 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:42:53" (1/1) ... [2021-02-24 04:42:53,138 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:42:53" (1/1) ... [2021-02-24 04:42:53,142 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 04:42:53,143 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 04:42:53,143 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 04:42:53,144 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 04:42:53,145 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:42:53" (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 04:42:53,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 04:42:53,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 04:42:53,273 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 04:42:53,273 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 04:42:53,273 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-24 04:42:53,273 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 04:42:53,274 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 04:42:53,274 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 04:42:53,274 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 04:42:53,275 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 04:42:53,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 04:42:53,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 04:42:53,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 04:42:53,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 04:42:53,278 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 04:42:53,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 04:42:54,034 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 04:42:54,034 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-02-24 04:42:54,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:42:54 BoogieIcfgContainer [2021-02-24 04:42:54,037 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 04:42:54,039 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 04:42:54,039 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 04:42:54,042 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 04:42:54,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 04:42:52" (1/3) ... [2021-02-24 04:42:54,043 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@596bf867 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:42:54, skipping insertion in model container [2021-02-24 04:42:54,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:42:53" (2/3) ... [2021-02-24 04:42:54,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@596bf867 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:42:54, skipping insertion in model container [2021-02-24 04:42:54,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:42:54" (3/3) ... [2021-02-24 04:42:54,046 INFO L111 eAbstractionObserver]: Analyzing ICFG psyco_security.c [2021-02-24 04:42:54,052 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 04:42:54,057 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 04:42:54,076 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 04:42:54,096 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 04:42:54,096 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 04:42:54,096 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-24 04:42:54,096 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 04:42:54,097 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 04:42:54,097 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 04:42:54,097 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 04:42:54,097 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 04:42:54,117 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states. [2021-02-24 04:42:54,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-24 04:42:54,127 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:42:54,128 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] [2021-02-24 04:42:54,129 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:42:54,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:42:54,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1599487208, now seen corresponding path program 1 times [2021-02-24 04:42:54,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:42:54,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [841580622] [2021-02-24 04:42:54,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:42:54,223 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:42:54,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:42:54,376 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:42:54,377 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:42:54,379 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:42:54,380 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:42:54,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:42:54,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:42:54,488 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:42:54,488 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:42:54,498 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 04:42:54,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [841580622] [2021-02-24 04:42:54,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:42:54,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-24 04:42:54,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210844690] [2021-02-24 04:42:54,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-24 04:42:54,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:42:54,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-24 04:42:54,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 04:42:54,528 INFO L87 Difference]: Start difference. First operand 200 states. Second operand 3 states. [2021-02-24 04:42:54,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:42:54,818 INFO L93 Difference]: Finished difference Result 378 states and 516 transitions. [2021-02-24 04:42:54,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-24 04:42:54,821 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2021-02-24 04:42:54,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:42:54,840 INFO L225 Difference]: With dead ends: 378 [2021-02-24 04:42:54,841 INFO L226 Difference]: Without dead ends: 186 [2021-02-24 04:42:54,848 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 [2021-02-24 04:42:54,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-02-24 04:42:55,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2021-02-24 04:42:55,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2021-02-24 04:42:55,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 221 transitions. [2021-02-24 04:42:55,013 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 221 transitions. Word has length 30 [2021-02-24 04:42:55,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:42:55,014 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 221 transitions. [2021-02-24 04:42:55,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-24 04:42:55,015 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 221 transitions. [2021-02-24 04:42:55,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-24 04:42:55,017 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:42:55,018 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] [2021-02-24 04:42:55,018 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 04:42:55,019 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:42:55,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:42:55,020 INFO L82 PathProgramCache]: Analyzing trace with hash 869436777, now seen corresponding path program 1 times [2021-02-24 04:42:55,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:42:55,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [445519902] [2021-02-24 04:42:55,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:42:55,037 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:42:55,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:42:55,101 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:42:55,102 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:42:55,103 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:42:55,105 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:42:55,114 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:42:55,115 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:42:55,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:42:55,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:42:55,221 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:42:55,222 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:42:55,227 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 04:42:55,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [445519902] [2021-02-24 04:42:55,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:42:55,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-24 04:42:55,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811745757] [2021-02-24 04:42:55,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-24 04:42:55,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:42:55,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-24 04:42:55,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-24 04:42:55,230 INFO L87 Difference]: Start difference. First operand 186 states and 221 transitions. Second operand 4 states. [2021-02-24 04:42:55,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:42:55,802 INFO L93 Difference]: Finished difference Result 354 states and 425 transitions. [2021-02-24 04:42:55,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-24 04:42:55,803 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2021-02-24 04:42:55,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:42:55,805 INFO L225 Difference]: With dead ends: 354 [2021-02-24 04:42:55,805 INFO L226 Difference]: Without dead ends: 189 [2021-02-24 04:42:55,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-24 04:42:55,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-02-24 04:42:55,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2021-02-24 04:42:55,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2021-02-24 04:42:55,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 224 transitions. [2021-02-24 04:42:55,854 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 224 transitions. Word has length 31 [2021-02-24 04:42:55,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:42:55,854 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 224 transitions. [2021-02-24 04:42:55,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-24 04:42:55,854 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 224 transitions. [2021-02-24 04:42:55,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-02-24 04:42:55,856 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:42:55,856 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] [2021-02-24 04:42:55,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 04:42:55,857 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:42:55,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:42:55,857 INFO L82 PathProgramCache]: Analyzing trace with hash -625938074, now seen corresponding path program 1 times [2021-02-24 04:42:55,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:42:55,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2094117597] [2021-02-24 04:42:55,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:42:55,886 WARN L141 QuantifierPusher]: treesize reduction 5, result has 80.0 percent of original size [2021-02-24 04:42:55,903 WARN L147 QuantifierPusher]: treesize reduction 5, result has 80.0 percent of original size 20 [2021-02-24 04:42:55,910 WARN L141 QuantifierPusher]: treesize reduction 5, result has 80.0 percent of original size [2021-02-24 04:42:55,913 WARN L147 QuantifierPusher]: treesize reduction 5, result has 80.0 percent of original size 20 [2021-02-24 04:42:55,938 WARN L141 QuantifierPusher]: treesize reduction 2, result has 90.0 percent of original size [2021-02-24 04:42:55,953 WARN L147 QuantifierPusher]: treesize reduction 2, result has 90.0 percent of original size 18 [2021-02-24 04:42:55,957 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:42:55,961 INFO L723 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-02-24 04:42:55,966 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:42:55,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:42:55,969 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:42:55,972 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-02-24 04:42:55,975 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-02-24 04:42:55,978 WARN L141 QuantifierPusher]: treesize reduction 3, result has 88.0 percent of original size [2021-02-24 04:42:55,984 WARN L147 QuantifierPusher]: treesize reduction 3, result has 88.0 percent of original size 22 [2021-02-24 04:42:55,987 WARN L141 QuantifierPusher]: treesize reduction 3, result has 88.0 percent of original size [2021-02-24 04:42:55,990 WARN L147 QuantifierPusher]: treesize reduction 3, result has 88.0 percent of original size 22 [2021-02-24 04:42:55,999 WARN L141 QuantifierPusher]: treesize reduction 12, result has 40.0 percent of original size [2021-02-24 04:42:56,001 WARN L147 QuantifierPusher]: treesize reduction 12, result has 40.0 percent of original size 8 [2021-02-24 04:42:56,003 WARN L141 QuantifierPusher]: treesize reduction 21, result has 12.5 percent of original size [2021-02-24 04:42:56,004 WARN L147 QuantifierPusher]: treesize reduction 21, result has 12.5 percent of original size 3 [2021-02-24 04:42:56,004 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-24 04:42:56,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 04:42:56,032 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 04:42:56,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 04:42:56,053 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 04:42:56,091 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-24 04:42:56,091 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-24 04:42:56,091 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-24 04:42:56,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 04:42:56 BoogieIcfgContainer [2021-02-24 04:42:56,109 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 04:42:56,110 INFO L168 Benchmark]: Toolchain (without parser) took 3482.18 ms. Allocated memory was 151.0 MB in the beginning and 196.1 MB in the end (delta: 45.1 MB). Free memory was 127.1 MB in the beginning and 166.6 MB in the end (delta: -39.5 MB). Peak memory consumption was 6.7 MB. Max. memory is 8.0 GB. [2021-02-24 04:42:56,111 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 151.0 MB. Free memory is still 125.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 04:42:56,112 INFO L168 Benchmark]: CACSL2BoogieTranslator took 441.43 ms. Allocated memory is still 151.0 MB. Free memory was 125.8 MB in the beginning and 114.3 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-02-24 04:42:56,113 INFO L168 Benchmark]: Boogie Preprocessor took 52.39 ms. Allocated memory is still 151.0 MB. Free memory was 114.3 MB in the beginning and 112.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-24 04:42:56,113 INFO L168 Benchmark]: RCFGBuilder took 893.73 ms. Allocated memory is still 151.0 MB. Free memory was 112.2 MB in the beginning and 131.2 MB in the end (delta: -19.0 MB). Peak memory consumption was 40.4 MB. Max. memory is 8.0 GB. [2021-02-24 04:42:56,114 INFO L168 Benchmark]: TraceAbstraction took 2070.09 ms. Allocated memory was 151.0 MB in the beginning and 196.1 MB in the end (delta: 45.1 MB). Free memory was 130.7 MB in the beginning and 166.6 MB in the end (delta: -35.8 MB). Peak memory consumption was 9.3 MB. Max. memory is 8.0 GB. [2021-02-24 04:42:56,118 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 151.0 MB. Free memory is still 125.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 441.43 ms. Allocated memory is still 151.0 MB. Free memory was 125.8 MB in the beginning and 114.3 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 52.39 ms. Allocated memory is still 151.0 MB. Free memory was 114.3 MB in the beginning and 112.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 893.73 ms. Allocated memory is still 151.0 MB. Free memory was 112.2 MB in the beginning and 131.2 MB in the end (delta: -19.0 MB). Peak memory consumption was 40.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2070.09 ms. Allocated memory was 151.0 MB in the beginning and 196.1 MB in the end (delta: 45.1 MB). Free memory was 130.7 MB in the beginning and 166.6 MB in the end (delta: -35.8 MB). Peak memory consumption was 9.3 MB. 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 TRUE q == 1 [L50] COND TRUE __VERIFIER_nondet_int() [L54] method_id = 4 [L56] 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: 1.9s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 461 SDtfs, 435 SDslu, 25 SDs, 0 SdLazy, 220 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s 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, 2 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...