/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/loop-lit/gsv2008.c.i.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 21:28:50,544 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 21:28:50,551 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 21:28:50,661 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-21 21:28:50,726 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 21:28:50,731 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 21:28:50,737 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 21:28:50,742 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 21:28:50,774 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 21:28:50,778 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 21:28:50,781 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 21:28:50,785 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 21:28:50,787 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 21:28:50,796 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 21:28:50,801 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 21:28:50,808 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 21:28:50,830 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 21:28:50,859 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 21:28:50,862 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 21:28:50,865 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 21:28:50,867 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 21:28:50,917 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 21:28:50,918 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 21:28:50,925 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 21:28:50,925 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 21:28:50,925 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 21:28:50,926 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 21:28:50,926 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 21:28:50,926 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 21:28:50,927 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 21:28:50,927 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 21:28:50,929 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 21:28:50,929 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 21:28:50,929 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 21:28:50,930 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 21:28:50,930 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 21:28:50,931 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 21:28:50,931 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 21:28:50,931 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 21:28:50,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 21:28:50,932 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 21:28:50,932 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 21:28:50,932 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 21:28:50,933 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 21:28:51,667 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 21:28:51,745 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 21:28:51,753 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 21:28:51,756 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 21:28:51,758 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 21:28:51,761 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gsv2008.c.i.v+cfa-reducer.c [2021-02-21 21:28:51,932 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba7e17b9e/0e54ce0c2a0e47d18d00cd46baf52ea0/FLAG48b363456 [2021-02-21 21:28:53,046 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 21:28:53,047 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gsv2008.c.i.v+cfa-reducer.c [2021-02-21 21:28:53,064 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba7e17b9e/0e54ce0c2a0e47d18d00cd46baf52ea0/FLAG48b363456 [2021-02-21 21:28:53,097 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba7e17b9e/0e54ce0c2a0e47d18d00cd46baf52ea0 [2021-02-21 21:28:53,104 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 21:28:53,124 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 21:28:53,128 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 21:28:53,129 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 21:28:53,137 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 21:28:53,140 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:28:53" (1/1) ... [2021-02-21 21:28:53,143 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b21f803 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:28:53, skipping insertion in model container [2021-02-21 21:28:53,144 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:28:53" (1/1) ... [2021-02-21 21:28:53,161 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 21:28:53,197 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 21:28:53,511 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gsv2008.c.i.v+cfa-reducer.c[986,999] [2021-02-21 21:28:53,520 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:28:53,546 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 21:28:53,591 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gsv2008.c.i.v+cfa-reducer.c[986,999] [2021-02-21 21:28:53,594 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:28:53,629 INFO L208 MainTranslator]: Completed translation [2021-02-21 21:28:53,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:28:53 WrapperNode [2021-02-21 21:28:53,630 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 21:28:53,633 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 21:28:53,634 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 21:28:53,635 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 21:28:53,660 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:28:53" (1/1) ... [2021-02-21 21:28:53,661 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:28:53" (1/1) ... [2021-02-21 21:28:53,677 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:28:53" (1/1) ... [2021-02-21 21:28:53,678 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:28:53" (1/1) ... [2021-02-21 21:28:53,689 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:28:53" (1/1) ... [2021-02-21 21:28:53,695 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:28:53" (1/1) ... [2021-02-21 21:28:53,698 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:28:53" (1/1) ... [2021-02-21 21:28:53,702 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 21:28:53,705 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 21:28:53,705 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 21:28:53,705 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 21:28:53,708 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:28:53" (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 [2021-02-21 21:28:53,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 21:28:53,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 21:28:53,960 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 21:28:53,962 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-21 21:28:53,963 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 21:28:53,963 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 21:28:53,964 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 21:28:53,964 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 21:28:53,966 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 21:28:53,967 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-21 21:28:53,968 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-21 21:28:53,968 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-21 21:28:53,969 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 21:28:53,969 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 21:28:53,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 21:28:53,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 21:28:53,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 21:28:53,972 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 21:28:53,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 21:28:54,607 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 21:28:54,608 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-21 21:28:54,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:28:54 BoogieIcfgContainer [2021-02-21 21:28:54,612 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 21:28:54,616 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 21:28:54,617 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 21:28:54,624 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 21:28:54,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 09:28:53" (1/3) ... [2021-02-21 21:28:54,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4695b616 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:28:54, skipping insertion in model container [2021-02-21 21:28:54,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:28:53" (2/3) ... [2021-02-21 21:28:54,629 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4695b616 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:28:54, skipping insertion in model container [2021-02-21 21:28:54,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:28:54" (3/3) ... [2021-02-21 21:28:54,633 INFO L111 eAbstractionObserver]: Analyzing ICFG gsv2008.c.i.v+cfa-reducer.c [2021-02-21 21:28:54,649 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 21:28:54,675 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 21:28:54,720 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 21:28:54,766 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 21:28:54,766 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 21:28:54,767 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 21:28:54,767 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 21:28:54,767 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 21:28:54,767 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 21:28:54,768 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 21:28:54,768 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 21:28:54,796 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2021-02-21 21:28:54,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-21 21:28:54,814 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:28:54,816 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] [2021-02-21 21:28:54,817 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:28:54,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:28:54,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1684338299, now seen corresponding path program 1 times [2021-02-21 21:28:54,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:28:54,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366378013] [2021-02-21 21:28:54,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:28:55,006 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:28:55,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:28:55,332 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:55,335 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:28:55,339 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:55,342 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 21:28:55,370 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:55,371 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:28:55,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:28:55,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:28:55,530 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:55,532 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:28:55,555 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 21:28:55,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [366378013] [2021-02-21 21:28:55,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:28:55,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 21:28:55,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64245266] [2021-02-21 21:28:55,576 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 21:28:55,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:28:55,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 21:28:55,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 21:28:55,609 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 4 states. [2021-02-21 21:28:55,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:28:55,968 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2021-02-21 21:28:55,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 21:28:55,972 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2021-02-21 21:28:55,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:28:55,989 INFO L225 Difference]: With dead ends: 59 [2021-02-21 21:28:55,990 INFO L226 Difference]: Without dead ends: 35 [2021-02-21 21:28:55,997 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 [2021-02-21 21:28:56,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-02-21 21:28:56,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-02-21 21:28:56,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-02-21 21:28:56,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2021-02-21 21:28:56,100 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 29 [2021-02-21 21:28:56,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:28:56,101 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2021-02-21 21:28:56,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 21:28:56,101 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2021-02-21 21:28:56,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-21 21:28:56,103 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:28:56,105 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] [2021-02-21 21:28:56,106 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 21:28:56,106 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:28:56,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:28:56,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1669681219, now seen corresponding path program 1 times [2021-02-21 21:28:56,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:28:56,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1188844423] [2021-02-21 21:28:56,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:28:56,167 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:28:56,187 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:28:56,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:28:56,375 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:56,378 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:28:56,381 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:56,382 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 21:28:56,396 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:56,398 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 21:28:56,414 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:56,416 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 21:28:56,438 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:56,439 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:28:56,459 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:56,462 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:28:56,486 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:56,488 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:28:56,516 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:56,517 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:28:56,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:28:56,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:28:56,646 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:56,647 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:28:56,655 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 21:28:56,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1188844423] [2021-02-21 21:28:56,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:28:56,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-21 21:28:56,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399829651] [2021-02-21 21:28:56,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-21 21:28:56,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:28:56,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-21 21:28:56,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-02-21 21:28:56,677 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 9 states. [2021-02-21 21:28:57,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:28:57,797 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2021-02-21 21:28:57,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-21 21:28:57,798 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2021-02-21 21:28:57,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:28:57,804 INFO L225 Difference]: With dead ends: 46 [2021-02-21 21:28:57,805 INFO L226 Difference]: Without dead ends: 39 [2021-02-21 21:28:57,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-02-21 21:28:57,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-02-21 21:28:57,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-02-21 21:28:57,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-02-21 21:28:57,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2021-02-21 21:28:57,829 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 33 [2021-02-21 21:28:57,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:28:57,830 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2021-02-21 21:28:57,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-21 21:28:57,830 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2021-02-21 21:28:57,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-21 21:28:57,832 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:28:57,832 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 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] [2021-02-21 21:28:57,833 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 21:28:57,834 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:28:57,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:28:57,835 INFO L82 PathProgramCache]: Analyzing trace with hash 189925377, now seen corresponding path program 2 times [2021-02-21 21:28:57,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:28:57,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1711752406] [2021-02-21 21:28:57,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:28:57,847 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:28:57,851 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:28:57,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:28:57,945 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:57,947 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:28:57,949 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:57,950 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 21:28:57,958 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:57,960 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 21:28:57,970 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:57,971 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 21:28:57,984 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:57,986 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:28:57,999 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:58,000 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:28:58,014 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:58,016 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:28:58,029 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:58,031 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:28:58,044 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:58,045 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:28:58,061 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:58,063 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:28:58,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:28:58,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:28:58,150 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:58,152 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:28:58,162 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 21:28:58,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1711752406] [2021-02-21 21:28:58,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:28:58,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-02-21 21:28:58,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840013673] [2021-02-21 21:28:58,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-21 21:28:58,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:28:58,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-21 21:28:58,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-02-21 21:28:58,173 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 11 states. [2021-02-21 21:28:59,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:28:59,107 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2021-02-21 21:28:59,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-21 21:28:59,108 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2021-02-21 21:28:59,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:28:59,111 INFO L225 Difference]: With dead ends: 50 [2021-02-21 21:28:59,111 INFO L226 Difference]: Without dead ends: 43 [2021-02-21 21:28:59,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-02-21 21:28:59,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-02-21 21:28:59,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2021-02-21 21:28:59,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-02-21 21:28:59,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2021-02-21 21:28:59,135 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 37 [2021-02-21 21:28:59,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:28:59,136 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2021-02-21 21:28:59,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-21 21:28:59,136 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2021-02-21 21:28:59,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-21 21:28:59,139 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:28:59,139 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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 21:28:59,139 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 21:28:59,140 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:28:59,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:28:59,141 INFO L82 PathProgramCache]: Analyzing trace with hash 174108863, now seen corresponding path program 3 times [2021-02-21 21:28:59,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:28:59,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652367140] [2021-02-21 21:28:59,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:28:59,154 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:28:59,157 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:28:59,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:28:59,234 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:59,236 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:28:59,238 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:59,239 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 21:28:59,246 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:59,248 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 21:28:59,258 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:59,260 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 21:28:59,273 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:59,275 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:28:59,287 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:59,288 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:28:59,303 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:59,304 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:28:59,320 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:59,321 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:28:59,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:28:59,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:28:59,391 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:59,393 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:28:59,397 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 21:28:59,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652367140] [2021-02-21 21:28:59,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:28:59,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-21 21:28:59,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157729214] [2021-02-21 21:28:59,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-21 21:28:59,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:28:59,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-21 21:28:59,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-02-21 21:28:59,403 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 9 states. [2021-02-21 21:28:59,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:28:59,985 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2021-02-21 21:28:59,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-21 21:28:59,986 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2021-02-21 21:28:59,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:28:59,988 INFO L225 Difference]: With dead ends: 42 [2021-02-21 21:28:59,989 INFO L226 Difference]: Without dead ends: 0 [2021-02-21 21:28:59,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-02-21 21:28:59,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-21 21:28:59,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-21 21:28:59,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-21 21:28:59,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-21 21:28:59,993 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2021-02-21 21:28:59,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:28:59,996 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-21 21:28:59,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-21 21:28:59,996 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-21 21:28:59,996 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-21 21:28:59,997 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 21:29:00,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-21 21:29:00,496 WARN L202 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 18 [2021-02-21 21:29:00,702 WARN L202 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 18 [2021-02-21 21:29:00,908 WARN L202 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 22 [2021-02-21 21:29:01,477 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 22 [2021-02-21 21:29:01,689 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 25 [2021-02-21 21:29:01,802 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 15 [2021-02-21 21:29:01,948 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2021-02-21 21:29:01,948 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 4) no Hoare annotation was computed. [2021-02-21 21:29:01,950 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2021-02-21 21:29:01,951 INFO L192 CegarLoopUtils]: At program point L4-3(line 4) the Hoare annotation is: true [2021-02-21 21:29:01,952 INFO L192 CegarLoopUtils]: At program point L4-4(line 4) the Hoare annotation is: true [2021-02-21 21:29:01,952 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-21 21:29:01,952 INFO L192 CegarLoopUtils]: At program point L4-5(line 4) the Hoare annotation is: true [2021-02-21 21:29:01,952 INFO L192 CegarLoopUtils]: At program point L-1-1(line -1) the Hoare annotation is: true [2021-02-21 21:29:01,953 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2021-02-21 21:29:01,953 INFO L192 CegarLoopUtils]: At program point L12(line 12) the Hoare annotation is: true [2021-02-21 21:29:01,953 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= ~__return_main~0 |old(~__return_main~0)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= ~__return_65~0 |old(~__return_65~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-02-21 21:29:01,953 INFO L192 CegarLoopUtils]: At program point L4(line 4) the Hoare annotation is: true [2021-02-21 21:29:01,954 INFO L192 CegarLoopUtils]: At program point L4-1(line 4) the Hoare annotation is: true [2021-02-21 21:29:01,954 INFO L192 CegarLoopUtils]: At program point L4-2(line 4) the Hoare annotation is: true [2021-02-21 21:29:01,955 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-02-21 21:29:01,955 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-02-21 21:29:01,955 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-21 21:29:01,956 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-21 21:29:01,956 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-02-21 21:29:01,956 INFO L189 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 6 8) no Hoare annotation was computed. [2021-02-21 21:29:01,956 INFO L189 CegarLoopUtils]: For program point L7(line 7) no Hoare annotation was computed. [2021-02-21 21:29:01,957 INFO L189 CegarLoopUtils]: For program point L7-1(line 7) no Hoare annotation was computed. [2021-02-21 21:29:01,957 INFO L189 CegarLoopUtils]: For program point L7-3(lines 6 8) no Hoare annotation was computed. [2021-02-21 21:29:01,957 INFO L189 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 6 8) no Hoare annotation was computed. [2021-02-21 21:29:01,958 INFO L185 CegarLoopUtils]: At program point L27(line 27) the Hoare annotation is: (and (= |old(~__return_65~0)| ~__return_65~0) (<= (+ main_~main__x~0 50) 0)) [2021-02-21 21:29:01,958 INFO L185 CegarLoopUtils]: At program point L25(lines 25 58) the Hoare annotation is: (and (= |old(~__return_65~0)| ~__return_65~0) (<= (+ main_~main__x~0 50) 0)) [2021-02-21 21:29:01,959 INFO L192 CegarLoopUtils]: At program point mainEXIT(lines 13 60) the Hoare annotation is: true [2021-02-21 21:29:01,959 INFO L192 CegarLoopUtils]: At program point L54(line 54) the Hoare annotation is: true [2021-02-21 21:29:01,959 INFO L185 CegarLoopUtils]: At program point L21(line 21) the Hoare annotation is: (and (= |old(~__return_65~0)| ~__return_65~0) (<= (+ main_~main__x~0 50) 0)) [2021-02-21 21:29:01,960 INFO L185 CegarLoopUtils]: At program point L19(lines 19 59) the Hoare annotation is: (and (= |old(~__return_65~0)| ~__return_65~0) (<= (+ main_~main__x~0 50) 0)) [2021-02-21 21:29:01,962 INFO L185 CegarLoopUtils]: At program point L17(line 17) the Hoare annotation is: (= |old(~__return_65~0)| ~__return_65~0) [2021-02-21 21:29:01,963 INFO L185 CegarLoopUtils]: At program point L48(line 48) the Hoare annotation is: false [2021-02-21 21:29:01,963 INFO L185 CegarLoopUtils]: At program point L46(lines 46 55) the Hoare annotation is: (let ((.cse0 (not (= main_~__tmp_1~0 0))) (.cse1 (not (= main_~__VERIFIER_assert__cond~0 0))) (.cse2 (= |old(~__return_65~0)| ~__return_65~0))) (or (and .cse0 .cse1 (<= 27 main_~main__y~0) (<= (+ main_~main__x~0 53) (* 2 main_~main__y~0)) .cse2) (and (<= 2 main_~main__y~0) .cse0 .cse1 .cse2 (<= (+ main_~main__x~0 2) main_~main__y~0)))) [2021-02-21 21:29:01,964 INFO L192 CegarLoopUtils]: At program point mainFINAL(lines 13 60) the Hoare annotation is: true [2021-02-21 21:29:01,964 INFO L185 CegarLoopUtils]: At program point L44(line 44) the Hoare annotation is: (let ((.cse0 (not (= main_~__tmp_1~0 0))) (.cse1 (= |old(~__return_65~0)| ~__return_65~0))) (or (and .cse0 (<= 27 main_~main__y~0) (<= (+ main_~main__x~0 53) (* 2 main_~main__y~0)) .cse1) (and (<= 2 main_~main__y~0) .cse0 .cse1 (<= (+ main_~main__x~0 2) main_~main__y~0)))) [2021-02-21 21:29:01,964 INFO L185 CegarLoopUtils]: At program point L42(line 42) the Hoare annotation is: (let ((.cse0 (= |old(~__return_65~0)| ~__return_65~0))) (or (and (<= 2 main_~main__y~0) .cse0 (<= (+ main_~main__x~0 2) main_~main__y~0)) (and (<= 27 main_~main__y~0) (<= (+ main_~main__x~0 53) (* 2 main_~main__y~0)) .cse0))) [2021-02-21 21:29:01,965 INFO L185 CegarLoopUtils]: At program point L36(line 36) the Hoare annotation is: (and (= |old(~__return_65~0)| ~__return_65~0) (<= (+ main_~main__x~0 1) main_~main__y~0)) [2021-02-21 21:29:01,965 INFO L185 CegarLoopUtils]: At program point L34(line 34) the Hoare annotation is: (let ((.cse0 (= |old(~__return_65~0)| ~__return_65~0))) (or (and .cse0 (<= (+ main_~main__x~0 50) 0)) (and (<= (+ main_~main__x~0 1) 0) .cse0 (<= (+ main_~main__x~0 2) main_~main__y~0)))) [2021-02-21 21:29:01,966 INFO L185 CegarLoopUtils]: At program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 48) the Hoare annotation is: false [2021-02-21 21:29:01,966 INFO L185 CegarLoopUtils]: At program point mainENTRY(lines 13 60) the Hoare annotation is: (= |old(~__return_65~0)| ~__return_65~0) [2021-02-21 21:29:01,966 INFO L185 CegarLoopUtils]: At program point L53(line 53) the Hoare annotation is: (= |old(~__return_65~0)| ~__return_65~0) [2021-02-21 21:29:01,967 INFO L185 CegarLoopUtils]: At program point L18(line 18) the Hoare annotation is: (and (= |old(~__return_65~0)| ~__return_65~0) (<= (+ main_~main__x~0 50) 0)) [2021-02-21 21:29:01,967 INFO L185 CegarLoopUtils]: At program point L18-1(line 18) the Hoare annotation is: (and (= |old(~__return_65~0)| ~__return_65~0) (<= (+ main_~main__x~0 50) 0)) [2021-02-21 21:29:01,967 INFO L185 CegarLoopUtils]: At program point L49(line 49) the Hoare annotation is: false [2021-02-21 21:29:01,967 INFO L185 CegarLoopUtils]: At program point L16(line 16) the Hoare annotation is: (= |old(~__return_65~0)| ~__return_65~0) [2021-02-21 21:29:01,968 INFO L185 CegarLoopUtils]: At program point L18-2(line 18) the Hoare annotation is: (and (= |old(~__return_65~0)| ~__return_65~0) (<= (+ main_~main__x~0 50) 0)) [2021-02-21 21:29:01,968 INFO L185 CegarLoopUtils]: At program point L45(line 45) the Hoare annotation is: (let ((.cse0 (not (= main_~__tmp_1~0 0))) (.cse1 (= |old(~__return_65~0)| ~__return_65~0))) (or (and .cse0 (<= 27 main_~main__y~0) (<= (+ main_~main__x~0 53) (* 2 main_~main__y~0)) .cse1) (and (<= 2 main_~main__y~0) .cse0 .cse1 (<= (+ main_~main__x~0 2) main_~main__y~0)))) [2021-02-21 21:29:01,968 INFO L185 CegarLoopUtils]: At program point L43(line 43) the Hoare annotation is: (let ((.cse0 (= |old(~__return_65~0)| ~__return_65~0))) (or (and (<= 2 main_~main__y~0) .cse0 (<= (+ main_~main__x~0 2) main_~main__y~0)) (and (<= 27 main_~main__y~0) (<= (+ main_~main__x~0 53) (* 2 main_~main__y~0)) .cse0))) [2021-02-21 21:29:01,972 INFO L185 CegarLoopUtils]: At program point L37(lines 30 58) the Hoare annotation is: (let ((.cse0 (= |old(~__return_65~0)| ~__return_65~0))) (or (and .cse0 (<= (+ main_~main__x~0 50) 0)) (and .cse0 (<= (+ main_~main__x~0 2) main_~main__y~0)))) [2021-02-21 21:29:01,972 INFO L185 CegarLoopUtils]: At program point L35(line 35) the Hoare annotation is: (and (= |old(~__return_65~0)| ~__return_65~0) (<= (+ main_~main__x~0 1) main_~main__y~0)) [2021-02-21 21:29:02,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 09:29:02 BoogieIcfgContainer [2021-02-21 21:29:02,024 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 21:29:02,030 INFO L168 Benchmark]: Toolchain (without parser) took 8919.20 ms. Allocated memory was 151.0 MB in the beginning and 234.9 MB in the end (delta: 83.9 MB). Free memory was 127.9 MB in the beginning and 214.7 MB in the end (delta: -86.8 MB). Peak memory consumption was 107.7 MB. Max. memory is 8.0 GB. [2021-02-21 21:29:02,038 INFO L168 Benchmark]: CDTParser took 0.78 ms. Allocated memory is still 151.0 MB. Free memory was 124.5 MB in the beginning and 124.0 MB in the end (delta: 435.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 21:29:02,048 INFO L168 Benchmark]: CACSL2BoogieTranslator took 503.58 ms. Allocated memory is still 151.0 MB. Free memory was 126.9 MB in the beginning and 117.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-21 21:29:02,052 INFO L168 Benchmark]: Boogie Preprocessor took 69.73 ms. Allocated memory is still 151.0 MB. Free memory was 116.9 MB in the beginning and 115.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-21 21:29:02,059 INFO L168 Benchmark]: RCFGBuilder took 907.44 ms. Allocated memory is still 151.0 MB. Free memory was 115.5 MB in the beginning and 132.8 MB in the end (delta: -17.3 MB). Peak memory consumption was 17.6 MB. Max. memory is 8.0 GB. [2021-02-21 21:29:02,061 INFO L168 Benchmark]: TraceAbstraction took 7408.05 ms. Allocated memory was 151.0 MB in the beginning and 234.9 MB in the end (delta: 83.9 MB). Free memory was 132.3 MB in the beginning and 214.7 MB in the end (delta: -82.4 MB). Peak memory consumption was 111.1 MB. Max. memory is 8.0 GB. [2021-02-21 21:29:02,073 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.78 ms. Allocated memory is still 151.0 MB. Free memory was 124.5 MB in the beginning and 124.0 MB in the end (delta: 435.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 503.58 ms. Allocated memory is still 151.0 MB. Free memory was 126.9 MB in the beginning and 117.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 69.73 ms. Allocated memory is still 151.0 MB. Free memory was 116.9 MB in the beginning and 115.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 907.44 ms. Allocated memory is still 151.0 MB. Free memory was 115.5 MB in the beginning and 132.8 MB in the end (delta: -17.3 MB). Peak memory consumption was 17.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 7408.05 ms. Allocated memory was 151.0 MB in the beginning and 234.9 MB in the end (delta: 83.9 MB). Free memory was 132.3 MB in the beginning and 214.7 MB in the end (delta: -82.4 MB). Peak memory consumption was 111.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 48]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: (\old(__return_65) == __return_65 && main__x + 50 <= 0) || (\old(__return_65) == __return_65 && main__x + 2 <= main__y) - ProcedureContractResult [Line: 13]: Procedure Contract for main Derived contract for procedure main: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 50 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.2s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 3.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.9s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 115 SDtfs, 158 SDslu, 255 SDs, 0 SdLazy, 398 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 59 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 2.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred 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, 4 MinimizatonAttempts, 3 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 42 LocationsWithAnnotation, 42 PreInvPairs, 74 NumberOfFragments, 361 HoareAnnotationTreeSize, 42 FomulaSimplifications, 1224 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 42 FomulaSimplificationsInter, 1171 FormulaSimplificationTreeSizeReductionInter, 1.6s HoareSimplificationTimeInter, 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 correct! Received shutdown request...