/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-invgen/apache-get-tag.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 21:22:15,433 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 21:22:15,435 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 21:22:15,472 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-21 21:22:15,484 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 21:22:15,486 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 21:22:15,487 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 21:22:15,488 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 21:22:15,489 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 21:22:15,491 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 21:22:15,493 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 21:22:15,495 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 21:22:15,497 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 21:22:15,499 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 21:22:15,500 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 21:22:15,501 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 21:22:15,504 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 21:22:15,531 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 21:22:15,533 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 21:22:15,534 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 21:22:15,536 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 21:22:15,557 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 21:22:15,557 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 21:22:15,562 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 21:22:15,562 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 21:22:15,563 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 21:22:15,563 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 21:22:15,563 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 21:22:15,563 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 21:22:15,563 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 21:22:15,564 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 21:22:15,565 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 21:22:15,565 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 21:22:15,565 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 21:22:15,566 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 21:22:15,566 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 21:22:15,566 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 21:22:15,566 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 21:22:15,567 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 21:22:15,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 21:22:15,567 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 21:22:15,567 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 21:22:15,568 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 21:22:15,568 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 21:22:15,990 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 21:22:16,032 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 21:22:16,035 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 21:22:16,037 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 21:22:16,037 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 21:22:16,038 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/apache-get-tag.i [2021-02-21 21:22:16,131 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57d3622fc/2b0cc956646c4ebb8421ccb168015cc8/FLAGc8a15f46f [2021-02-21 21:22:16,806 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 21:22:16,807 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/apache-get-tag.i [2021-02-21 21:22:16,818 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57d3622fc/2b0cc956646c4ebb8421ccb168015cc8/FLAGc8a15f46f [2021-02-21 21:22:17,207 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57d3622fc/2b0cc956646c4ebb8421ccb168015cc8 [2021-02-21 21:22:17,213 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 21:22:17,229 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 21:22:17,235 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 21:22:17,235 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 21:22:17,239 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 21:22:17,240 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:22:17" (1/1) ... [2021-02-21 21:22:17,242 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59caad1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:22:17, skipping insertion in model container [2021-02-21 21:22:17,243 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:22:17" (1/1) ... [2021-02-21 21:22:17,252 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 21:22:17,277 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 21:22:17,492 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-invgen/apache-get-tag.i[893,906] [2021-02-21 21:22:17,511 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:22:17,522 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 21:22:17,548 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-invgen/apache-get-tag.i[893,906] [2021-02-21 21:22:17,571 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:22:17,588 INFO L208 MainTranslator]: Completed translation [2021-02-21 21:22:17,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:22:17 WrapperNode [2021-02-21 21:22:17,589 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 21:22:17,590 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 21:22:17,590 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 21:22:17,590 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 21:22:17,603 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:22:17" (1/1) ... [2021-02-21 21:22:17,604 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:22:17" (1/1) ... [2021-02-21 21:22:17,612 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:22:17" (1/1) ... [2021-02-21 21:22:17,612 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:22:17" (1/1) ... [2021-02-21 21:22:17,619 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:22:17" (1/1) ... [2021-02-21 21:22:17,625 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:22:17" (1/1) ... [2021-02-21 21:22:17,627 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:22:17" (1/1) ... [2021-02-21 21:22:17,630 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 21:22:17,631 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 21:22:17,632 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 21:22:17,632 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 21:22:17,633 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:22:17" (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 21:22:17,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 21:22:17,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 21:22:17,743 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 21:22:17,743 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-21 21:22:17,743 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-21 21:22:17,743 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 21:22:17,743 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 21:22:17,744 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 21:22:17,744 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-21 21:22:17,744 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-21 21:22:17,744 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 21:22:17,744 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 21:22:17,745 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-21 21:22:17,745 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-21 21:22:17,745 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-21 21:22:17,745 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 21:22:17,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 21:22:17,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 21:22:17,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 21:22:17,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 21:22:17,746 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 21:22:17,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 21:22:18,187 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 21:22:18,188 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-02-21 21:22:18,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:22:18 BoogieIcfgContainer [2021-02-21 21:22:18,190 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 21:22:18,192 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 21:22:18,192 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 21:22:18,196 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 21:22:18,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 09:22:17" (1/3) ... [2021-02-21 21:22:18,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2409b8c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:22:18, skipping insertion in model container [2021-02-21 21:22:18,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:22:17" (2/3) ... [2021-02-21 21:22:18,198 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2409b8c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:22:18, skipping insertion in model container [2021-02-21 21:22:18,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:22:18" (3/3) ... [2021-02-21 21:22:18,199 INFO L111 eAbstractionObserver]: Analyzing ICFG apache-get-tag.i [2021-02-21 21:22:18,206 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 21:22:18,212 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 21:22:18,232 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 21:22:18,258 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 21:22:18,259 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 21:22:18,259 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 21:22:18,259 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 21:22:18,259 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 21:22:18,259 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 21:22:18,260 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 21:22:18,260 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 21:22:18,285 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states. [2021-02-21 21:22:18,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-21 21:22:18,305 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:22:18,306 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] [2021-02-21 21:22:18,307 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:22:18,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:22:18,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1183090698, now seen corresponding path program 1 times [2021-02-21 21:22:18,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:22:18,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [728636125] [2021-02-21 21:22:18,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:22:18,470 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:22:18,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:22:18,695 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:22:18,697 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:22:18,698 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:22:18,702 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:22:18,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:22:18,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:22:18,807 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:22:18,809 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:22:18,820 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 21:22:18,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [728636125] [2021-02-21 21:22:18,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:22:18,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-21 21:22:18,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069979987] [2021-02-21 21:22:18,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-21 21:22:18,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:22:18,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-21 21:22:18,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-21 21:22:18,859 INFO L87 Difference]: Start difference. First operand 82 states. Second operand 3 states. [2021-02-21 21:22:19,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:22:19,151 INFO L93 Difference]: Finished difference Result 142 states and 211 transitions. [2021-02-21 21:22:19,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-21 21:22:19,153 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2021-02-21 21:22:19,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:22:19,165 INFO L225 Difference]: With dead ends: 142 [2021-02-21 21:22:19,165 INFO L226 Difference]: Without dead ends: 76 [2021-02-21 21:22:19,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-21 21:22:19,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-02-21 21:22:19,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-02-21 21:22:19,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-02-21 21:22:19,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 94 transitions. [2021-02-21 21:22:19,249 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 94 transitions. Word has length 26 [2021-02-21 21:22:19,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:22:19,249 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 94 transitions. [2021-02-21 21:22:19,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-21 21:22:19,250 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 94 transitions. [2021-02-21 21:22:19,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-21 21:22:19,251 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:22:19,251 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] [2021-02-21 21:22:19,252 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 21:22:19,252 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:22:19,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:22:19,253 INFO L82 PathProgramCache]: Analyzing trace with hash -2035797628, now seen corresponding path program 1 times [2021-02-21 21:22:19,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:22:19,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395565474] [2021-02-21 21:22:19,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:22:19,257 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:22:19,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:22:19,345 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:22:19,347 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:22:19,360 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-21 21:22:19,363 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-21 21:22:19,369 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:22:19,370 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:22:19,375 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:22:19,376 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:22:19,385 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:22:19,386 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:22:19,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:22:19,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:22:19,445 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:22:19,464 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:22:19,469 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 21:22:19,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395565474] [2021-02-21 21:22:19,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:22:19,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 21:22:19,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180835987] [2021-02-21 21:22:19,472 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 21:22:19,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:22:19,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 21:22:19,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-21 21:22:19,476 INFO L87 Difference]: Start difference. First operand 76 states and 94 transitions. Second operand 6 states. [2021-02-21 21:22:20,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:22:20,025 INFO L93 Difference]: Finished difference Result 98 states and 122 transitions. [2021-02-21 21:22:20,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-21 21:22:20,026 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2021-02-21 21:22:20,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:22:20,029 INFO L225 Difference]: With dead ends: 98 [2021-02-21 21:22:20,029 INFO L226 Difference]: Without dead ends: 96 [2021-02-21 21:22:20,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-02-21 21:22:20,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-02-21 21:22:20,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 89. [2021-02-21 21:22:20,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2021-02-21 21:22:20,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 111 transitions. [2021-02-21 21:22:20,060 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 111 transitions. Word has length 27 [2021-02-21 21:22:20,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:22:20,061 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 111 transitions. [2021-02-21 21:22:20,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 21:22:20,062 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 111 transitions. [2021-02-21 21:22:20,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-21 21:22:20,063 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:22:20,063 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] [2021-02-21 21:22:20,063 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 21:22:20,064 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:22:20,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:22:20,064 INFO L82 PathProgramCache]: Analyzing trace with hash 836322033, now seen corresponding path program 1 times [2021-02-21 21:22:20,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:22:20,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1741312761] [2021-02-21 21:22:20,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:22:20,068 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:22:20,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:22:20,161 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:22:20,162 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:22:20,163 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:22:20,164 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:22:20,169 WARN L141 QuantifierPusher]: treesize reduction 9, result has 69.0 percent of original size [2021-02-21 21:22:20,170 WARN L147 QuantifierPusher]: treesize reduction 9, result has 69.0 percent of original size 20 [2021-02-21 21:22:20,191 WARN L141 QuantifierPusher]: treesize reduction 4, result has 73.3 percent of original size [2021-02-21 21:22:20,192 WARN L147 QuantifierPusher]: treesize reduction 4, result has 73.3 percent of original size 11 [2021-02-21 21:22:20,201 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:22:20,202 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:22:20,207 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:22:20,208 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:22:20,214 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:22:20,215 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:22:20,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:22:20,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:22:20,246 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:22:20,246 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:22:20,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-02-21 21:22:20,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:22:20,253 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:22:20,254 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:22:20,258 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 21:22:20,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1741312761] [2021-02-21 21:22:20,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:22:20,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-21 21:22:20,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456909599] [2021-02-21 21:22:20,260 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-21 21:22:20,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:22:20,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-21 21:22:20,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-21 21:22:20,261 INFO L87 Difference]: Start difference. First operand 89 states and 111 transitions. Second operand 8 states. [2021-02-21 21:22:20,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:22:20,770 INFO L93 Difference]: Finished difference Result 102 states and 125 transitions. [2021-02-21 21:22:20,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-21 21:22:20,770 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2021-02-21 21:22:20,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:22:20,772 INFO L225 Difference]: With dead ends: 102 [2021-02-21 21:22:20,772 INFO L226 Difference]: Without dead ends: 91 [2021-02-21 21:22:20,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-02-21 21:22:20,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-02-21 21:22:20,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 85. [2021-02-21 21:22:20,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-02-21 21:22:20,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 102 transitions. [2021-02-21 21:22:20,792 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 102 transitions. Word has length 32 [2021-02-21 21:22:20,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:22:20,793 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 102 transitions. [2021-02-21 21:22:20,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-21 21:22:20,793 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 102 transitions. [2021-02-21 21:22:20,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-21 21:22:20,794 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:22:20,795 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] [2021-02-21 21:22:20,795 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 21:22:20,795 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:22:20,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:22:20,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1034410599, now seen corresponding path program 1 times [2021-02-21 21:22:20,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:22:20,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273395933] [2021-02-21 21:22:20,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:22:20,799 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:22:20,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:22:20,842 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:22:20,843 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:22:20,844 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:22:20,844 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:22:20,848 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:22:20,849 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:22:20,862 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:22:20,862 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:22:20,871 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:22:20,872 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:22:20,876 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:22:20,877 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:22:20,882 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:22:20,883 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:22:20,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:22:20,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:22:20,908 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:22:20,909 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:22:20,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-02-21 21:22:20,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:22:20,914 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:22:20,915 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:22:20,918 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 21:22:20,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273395933] [2021-02-21 21:22:20,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:22:20,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-21 21:22:20,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116466029] [2021-02-21 21:22:20,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-21 21:22:20,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:22:20,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-21 21:22:20,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-21 21:22:20,921 INFO L87 Difference]: Start difference. First operand 85 states and 102 transitions. Second operand 8 states. [2021-02-21 21:22:21,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:22:21,356 INFO L93 Difference]: Finished difference Result 97 states and 115 transitions. [2021-02-21 21:22:21,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-21 21:22:21,357 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2021-02-21 21:22:21,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:22:21,359 INFO L225 Difference]: With dead ends: 97 [2021-02-21 21:22:21,359 INFO L226 Difference]: Without dead ends: 95 [2021-02-21 21:22:21,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-02-21 21:22:21,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-02-21 21:22:21,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2021-02-21 21:22:21,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2021-02-21 21:22:21,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 109 transitions. [2021-02-21 21:22:21,379 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 109 transitions. Word has length 35 [2021-02-21 21:22:21,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:22:21,380 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 109 transitions. [2021-02-21 21:22:21,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-21 21:22:21,380 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 109 transitions. [2021-02-21 21:22:21,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-02-21 21:22:21,381 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:22:21,382 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:22:21,382 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 21:22:21,382 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:22:21,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:22:21,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1264498093, now seen corresponding path program 1 times [2021-02-21 21:22:21,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:22:21,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2098217129] [2021-02-21 21:22:21,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:22:21,386 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:22:21,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:22:21,418 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:22:21,419 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:22:21,419 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:22:21,420 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:22:21,422 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:22:21,423 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:22:21,426 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:22:21,427 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:22:21,431 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:22:21,431 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:22:21,436 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:22:21,437 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:22:21,442 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:22:21,443 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:22:21,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:22:21,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:22:21,467 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:22:21,468 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:22:21,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-02-21 21:22:21,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:22:21,473 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:22:21,474 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:22:21,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-02-21 21:22:21,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:22:21,478 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:22:21,479 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:22:21,482 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 21:22:21,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2098217129] [2021-02-21 21:22:21,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:22:21,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-21 21:22:21,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062057464] [2021-02-21 21:22:21,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-21 21:22:21,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:22:21,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-21 21:22:21,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-02-21 21:22:21,490 INFO L87 Difference]: Start difference. First operand 91 states and 109 transitions. Second operand 8 states. [2021-02-21 21:22:22,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:22:22,128 INFO L93 Difference]: Finished difference Result 127 states and 153 transitions. [2021-02-21 21:22:22,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-21 21:22:22,128 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2021-02-21 21:22:22,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:22:22,130 INFO L225 Difference]: With dead ends: 127 [2021-02-21 21:22:22,130 INFO L226 Difference]: Without dead ends: 124 [2021-02-21 21:22:22,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-02-21 21:22:22,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-02-21 21:22:22,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 115. [2021-02-21 21:22:22,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2021-02-21 21:22:22,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 138 transitions. [2021-02-21 21:22:22,156 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 138 transitions. Word has length 45 [2021-02-21 21:22:22,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:22:22,156 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 138 transitions. [2021-02-21 21:22:22,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-21 21:22:22,157 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 138 transitions. [2021-02-21 21:22:22,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-02-21 21:22:22,158 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:22:22,159 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:22:22,159 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-21 21:22:22,159 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:22:22,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:22:22,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1741298737, now seen corresponding path program 1 times [2021-02-21 21:22:22,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:22:22,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1134935204] [2021-02-21 21:22:22,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:22:22,213 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:22:22,213 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:22:24,356 WARN L141 QuantifierPusher]: treesize reduction 6, result has 94.4 percent of original size [2021-02-21 21:22:24,387 WARN L147 QuantifierPusher]: treesize reduction 6, result has 94.4 percent of original size 102 [2021-02-21 21:22:24,389 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-21 21:22:24,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 21:22:24,406 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 21:22:24,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 21:22:24,422 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 21:22:24,452 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-21 21:22:24,453 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-21 21:22:24,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-21 21:22:24,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 09:22:24 BoogieIcfgContainer [2021-02-21 21:22:24,472 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 21:22:24,474 INFO L168 Benchmark]: Toolchain (without parser) took 7258.20 ms. Allocated memory was 172.0 MB in the beginning and 227.5 MB in the end (delta: 55.6 MB). Free memory was 149.0 MB in the beginning and 134.3 MB in the end (delta: 14.7 MB). Peak memory consumption was 70.7 MB. Max. memory is 8.0 GB. [2021-02-21 21:22:24,474 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 172.0 MB. Free memory is still 147.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 21:22:24,475 INFO L168 Benchmark]: CACSL2BoogieTranslator took 354.20 ms. Allocated memory is still 172.0 MB. Free memory was 147.9 MB in the beginning and 137.8 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-21 21:22:24,476 INFO L168 Benchmark]: Boogie Preprocessor took 40.74 ms. Allocated memory is still 172.0 MB. Free memory was 137.8 MB in the beginning and 136.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-21 21:22:24,477 INFO L168 Benchmark]: RCFGBuilder took 558.60 ms. Allocated memory is still 172.0 MB. Free memory was 136.2 MB in the beginning and 150.2 MB in the end (delta: -14.0 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. [2021-02-21 21:22:24,478 INFO L168 Benchmark]: TraceAbstraction took 6280.73 ms. Allocated memory was 172.0 MB in the beginning and 227.5 MB in the end (delta: 55.6 MB). Free memory was 149.7 MB in the beginning and 134.3 MB in the end (delta: 15.4 MB). Peak memory consumption was 72.0 MB. Max. memory is 8.0 GB. [2021-02-21 21:22:24,481 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 172.0 MB. Free memory is still 147.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 354.20 ms. Allocated memory is still 172.0 MB. Free memory was 147.9 MB in the beginning and 137.8 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 40.74 ms. Allocated memory is still 172.0 MB. Free memory was 137.8 MB in the beginning and 136.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 558.60 ms. Allocated memory is still 172.0 MB. Free memory was 136.2 MB in the beginning and 150.2 MB in the end (delta: -14.0 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6280.73 ms. Allocated memory was 172.0 MB in the beginning and 227.5 MB in the end (delta: 55.6 MB). Free memory was 149.7 MB in the beginning and 134.3 MB in the end (delta: 15.4 MB). Peak memory consumption was 72.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 19]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L26] int tagbuf_len; [L27] int t; [L28] tagbuf_len = __VERIFIER_nondet_int() [L29] COND TRUE tagbuf_len >= 1 [L30] t = 0 [L31] --tagbuf_len [L32] COND TRUE 1 [L33] COND FALSE !(t == tagbuf_len) [L38] COND FALSE !(__VERIFIER_nondet_int()) [L41] CALL __VERIFIER_assert(0 <= t) [L18] COND FALSE !(!(cond)) [L41] RET __VERIFIER_assert(0 <= t) [L42] CALL __VERIFIER_assert(t <= tagbuf_len) [L18] COND FALSE !(!(cond)) [L42] RET __VERIFIER_assert(t <= tagbuf_len) [L43] t++ [L32] COND TRUE 1 [L33] COND TRUE t == tagbuf_len [L34] CALL __VERIFIER_assert(0 <= t) [L18] COND TRUE !(cond) [L19] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 92 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.1s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 2.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 376 SDtfs, 483 SDslu, 363 SDs, 0 SdLazy, 1297 SolverSat, 212 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 72 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=115occurred in iteration=5, 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, 5 MinimizatonAttempts, 26 StatesRemovedByMinimization, 4 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...