/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf -i ../../../trunk/examples/svcomp/array-fpi/s2iff.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-22 02:20:20,346 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 02:20:20,349 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 02:20:20,406 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-22 02:20:20,440 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-22 02:20:20,443 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-22 02:20:20,445 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-22 02:20:20,447 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-22 02:20:20,451 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-22 02:20:20,453 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-22 02:20:20,483 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-22 02:20:20,497 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-22 02:20:20,499 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-22 02:20:20,505 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-22 02:20:20,513 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-22 02:20:20,518 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-22 02:20:20,532 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-22 02:20:20,551 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-22 02:20:20,552 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-22 02:20:20,553 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-22 02:20:20,555 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-22 02:20:20,577 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 02:20:20,577 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 02:20:20,582 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 02:20:20,582 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 02:20:20,582 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 02:20:20,582 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 02:20:20,583 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 02:20:20,583 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 02:20:20,583 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 02:20:20,583 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 02:20:20,585 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 02:20:20,585 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 02:20:20,585 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 02:20:20,585 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 02:20:20,586 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 02:20:20,586 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 02:20:20,586 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 02:20:20,586 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 02:20:20,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 02:20:20,587 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 02:20:20,587 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 02:20:20,587 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 02:20:20,587 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 02:20:20,588 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 02:20:20,974 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 02:20:21,009 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 02:20:21,012 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 02:20:21,014 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 02:20:21,015 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 02:20:21,016 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s2iff.c [2021-02-22 02:20:21,105 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d76add5e0/76c5f613dce54949b8fb2b5f0b1d34ab/FLAGecc0dd592 [2021-02-22 02:20:21,769 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 02:20:21,769 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s2iff.c [2021-02-22 02:20:21,780 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d76add5e0/76c5f613dce54949b8fb2b5f0b1d34ab/FLAGecc0dd592 [2021-02-22 02:20:21,810 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d76add5e0/76c5f613dce54949b8fb2b5f0b1d34ab [2021-02-22 02:20:21,814 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 02:20:21,830 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 02:20:21,836 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 02:20:21,836 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 02:20:21,840 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 02:20:21,841 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:20:21" (1/1) ... [2021-02-22 02:20:21,843 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a091468 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:21, skipping insertion in model container [2021-02-22 02:20:21,843 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:20:21" (1/1) ... [2021-02-22 02:20:21,854 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 02:20:21,886 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 02:20:22,127 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s2iff.c[588,601] [2021-02-22 02:20:22,160 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:20:22,170 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 02:20:22,188 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s2iff.c[588,601] [2021-02-22 02:20:22,215 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:20:22,241 INFO L208 MainTranslator]: Completed translation [2021-02-22 02:20:22,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:22 WrapperNode [2021-02-22 02:20:22,243 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 02:20:22,245 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 02:20:22,245 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 02:20:22,246 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 02:20:22,263 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:22" (1/1) ... [2021-02-22 02:20:22,264 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:22" (1/1) ... [2021-02-22 02:20:22,303 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:22" (1/1) ... [2021-02-22 02:20:22,304 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:22" (1/1) ... [2021-02-22 02:20:22,343 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:22" (1/1) ... [2021-02-22 02:20:22,351 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:22" (1/1) ... [2021-02-22 02:20:22,354 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:22" (1/1) ... [2021-02-22 02:20:22,362 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 02:20:22,363 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 02:20:22,364 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 02:20:22,364 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 02:20:22,365 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 02:20:22,481 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 02:20:22,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 02:20:22,482 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 02:20:22,482 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-22 02:20:22,482 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-22 02:20:22,483 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 02:20:22,483 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 02:20:22,483 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 02:20:22,484 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 02:20:22,484 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 02:20:22,484 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-22 02:20:22,484 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-22 02:20:22,485 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-22 02:20:22,485 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-22 02:20:22,486 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 02:20:22,486 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-22 02:20:22,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 02:20:22,487 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 02:20:22,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 02:20:22,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 02:20:22,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 02:20:22,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 02:20:23,015 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 02:20:23,016 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-02-22 02:20:23,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:20:23 BoogieIcfgContainer [2021-02-22 02:20:23,018 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 02:20:23,020 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 02:20:23,020 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 02:20:23,024 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 02:20:23,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 02:20:21" (1/3) ... [2021-02-22 02:20:23,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a374065 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:20:23, skipping insertion in model container [2021-02-22 02:20:23,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:22" (2/3) ... [2021-02-22 02:20:23,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a374065 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:20:23, skipping insertion in model container [2021-02-22 02:20:23,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:20:23" (3/3) ... [2021-02-22 02:20:23,028 INFO L111 eAbstractionObserver]: Analyzing ICFG s2iff.c [2021-02-22 02:20:23,035 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 02:20:23,040 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 02:20:23,061 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 02:20:23,087 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 02:20:23,087 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 02:20:23,087 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 02:20:23,087 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 02:20:23,087 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 02:20:23,088 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 02:20:23,088 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 02:20:23,088 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 02:20:23,105 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states. [2021-02-22 02:20:23,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-22 02:20:23,115 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:20:23,116 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 02:20:23,117 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:20:23,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:20:23,124 INFO L82 PathProgramCache]: Analyzing trace with hash 137751759, now seen corresponding path program 1 times [2021-02-22 02:20:23,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:20:23,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1440147552] [2021-02-22 02:20:23,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:20:23,210 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:20:23,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:23,418 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:23,421 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:23,423 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:23,424 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:23,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:20:23,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:23,520 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:23,521 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:23,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-22 02:20:23,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:23,529 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:23,530 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:23,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:20:23,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1440147552] [2021-02-22 02:20:23,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:20:23,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-22 02:20:23,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80843362] [2021-02-22 02:20:23,554 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-22 02:20:23,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:20:23,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-22 02:20:23,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-22 02:20:23,577 INFO L87 Difference]: Start difference. First operand 71 states. Second operand 3 states. [2021-02-22 02:20:23,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:20:23,830 INFO L93 Difference]: Finished difference Result 119 states and 132 transitions. [2021-02-22 02:20:23,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-22 02:20:23,832 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 36 [2021-02-22 02:20:23,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:20:23,842 INFO L225 Difference]: With dead ends: 119 [2021-02-22 02:20:23,842 INFO L226 Difference]: Without dead ends: 58 [2021-02-22 02:20:23,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-22 02:20:23,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-02-22 02:20:23,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-02-22 02:20:23,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-02-22 02:20:23,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2021-02-22 02:20:23,923 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 36 [2021-02-22 02:20:23,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:20:23,924 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2021-02-22 02:20:23,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-22 02:20:23,925 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2021-02-22 02:20:23,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-22 02:20:23,926 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:20:23,927 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 02:20:23,927 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 02:20:23,927 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:20:23,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:20:23,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1632327928, now seen corresponding path program 1 times [2021-02-22 02:20:23,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:20:23,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078387409] [2021-02-22 02:20:23,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:20:23,933 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:20:23,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:24,010 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:24,011 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:24,013 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:24,014 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:20:24,026 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:24,028 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:20:24,040 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:24,041 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:24,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:20:24,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:24,098 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:24,099 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:24,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-22 02:20:24,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:24,108 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:24,109 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:24,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:20:24,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078387409] [2021-02-22 02:20:24,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:20:24,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-22 02:20:24,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052936249] [2021-02-22 02:20:24,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-22 02:20:24,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:20:24,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-22 02:20:24,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-22 02:20:24,123 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 5 states. [2021-02-22 02:20:24,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:20:24,572 INFO L93 Difference]: Finished difference Result 104 states and 110 transitions. [2021-02-22 02:20:24,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-22 02:20:24,573 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2021-02-22 02:20:24,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:20:24,580 INFO L225 Difference]: With dead ends: 104 [2021-02-22 02:20:24,580 INFO L226 Difference]: Without dead ends: 79 [2021-02-22 02:20:24,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-02-22 02:20:24,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-02-22 02:20:24,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 60. [2021-02-22 02:20:24,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-02-22 02:20:24,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2021-02-22 02:20:24,624 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 36 [2021-02-22 02:20:24,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:20:24,626 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2021-02-22 02:20:24,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-22 02:20:24,626 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2021-02-22 02:20:24,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-22 02:20:24,631 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:20:24,633 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 02:20:24,633 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-22 02:20:24,633 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:20:24,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:20:24,635 INFO L82 PathProgramCache]: Analyzing trace with hash -881259695, now seen corresponding path program 1 times [2021-02-22 02:20:24,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:20:24,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1844968504] [2021-02-22 02:20:24,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:20:24,664 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:24,679 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-22 02:20:24,685 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:24,688 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-22 02:20:24,696 WARN L141 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size [2021-02-22 02:20:24,713 WARN L147 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size 13 [2021-02-22 02:20:24,721 WARN L141 QuantifierPusher]: treesize reduction 14, result has 68.2 percent of original size [2021-02-22 02:20:24,725 WARN L147 QuantifierPusher]: treesize reduction 14, result has 68.2 percent of original size 30 [2021-02-22 02:20:24,727 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-02-22 02:20:24,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:24,943 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:24,944 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:24,944 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:24,945 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:20:24,949 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:24,950 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-22 02:20:24,959 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:24,960 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-22 02:20:24,969 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:24,970 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-22 02:20:24,981 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:24,983 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-22 02:20:24,998 WARN L141 QuantifierPusher]: treesize reduction 6, result has 72.7 percent of original size [2021-02-22 02:20:24,999 WARN L147 QuantifierPusher]: treesize reduction 6, result has 72.7 percent of original size 16 [2021-02-22 02:20:25,013 WARN L141 QuantifierPusher]: treesize reduction 6, result has 81.8 percent of original size [2021-02-22 02:20:25,014 WARN L147 QuantifierPusher]: treesize reduction 6, result has 81.8 percent of original size 27 [2021-02-22 02:20:25,033 WARN L141 QuantifierPusher]: treesize reduction 6, result has 81.8 percent of original size [2021-02-22 02:20:25,034 WARN L147 QuantifierPusher]: treesize reduction 6, result has 81.8 percent of original size 27 [2021-02-22 02:20:25,056 WARN L141 QuantifierPusher]: treesize reduction 24, result has 48.9 percent of original size [2021-02-22 02:20:25,057 WARN L147 QuantifierPusher]: treesize reduction 24, result has 48.9 percent of original size 23 [2021-02-22 02:20:25,078 WARN L141 QuantifierPusher]: treesize reduction 55, result has 36.8 percent of original size [2021-02-22 02:20:25,080 WARN L147 QuantifierPusher]: treesize reduction 55, result has 36.8 percent of original size 32 [2021-02-22 02:20:25,116 WARN L141 QuantifierPusher]: treesize reduction 15, result has 53.1 percent of original size [2021-02-22 02:20:25,118 WARN L147 QuantifierPusher]: treesize reduction 15, result has 53.1 percent of original size 17 [2021-02-22 02:20:25,144 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:25,145 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-22 02:20:25,169 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:25,171 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-22 02:20:25,196 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:25,197 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-22 02:20:25,216 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:25,217 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-22 02:20:25,236 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:25,237 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:20:25,257 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:25,258 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:20:25,304 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:25,305 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:25,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:20:25,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:25,364 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:25,365 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:25,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-22 02:20:25,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:25,370 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:25,370 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:25,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:20:25,385 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:25,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:20:25,389 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:25,390 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-02-22 02:20:25,392 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-02-22 02:20:25,446 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:25,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:20:25,448 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:25,450 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-02-22 02:20:25,452 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-02-22 02:20:25,511 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:25,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:20:25,514 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:25,516 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-02-22 02:20:25,517 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-02-22 02:20:25,582 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:25,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:20:25,585 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:25,587 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-02-22 02:20:25,589 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 53 [2021-02-22 02:20:25,650 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:25,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:20:25,655 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:25,657 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-02-22 02:20:25,659 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 59 [2021-02-22 02:20:25,727 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:25,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:20:25,733 WARN L141 QuantifierPusher]: treesize reduction 2, result has 96.0 percent of original size [2021-02-22 02:20:25,734 WARN L147 QuantifierPusher]: treesize reduction 2, result has 96.0 percent of original size 48 [2021-02-22 02:20:25,736 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 56 [2021-02-22 02:20:25,805 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:25,807 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:25,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1844968504] [2021-02-22 02:20:25,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:20:25,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-02-22 02:20:25,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481875069] [2021-02-22 02:20:25,808 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-22 02:20:25,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:20:25,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-22 02:20:25,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=530, Unknown=15, NotChecked=0, Total=650 [2021-02-22 02:20:25,811 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 24 states. [2021-02-22 02:20:27,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:20:27,483 INFO L93 Difference]: Finished difference Result 96 states and 100 transitions. [2021-02-22 02:20:27,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-22 02:20:27,484 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 53 [2021-02-22 02:20:27,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:20:27,488 INFO L225 Difference]: With dead ends: 96 [2021-02-22 02:20:27,489 INFO L226 Difference]: Without dead ends: 90 [2021-02-22 02:20:27,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=203, Invalid=1184, Unknown=19, NotChecked=0, Total=1406 [2021-02-22 02:20:27,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-02-22 02:20:27,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 78. [2021-02-22 02:20:27,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-02-22 02:20:27,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2021-02-22 02:20:27,523 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 53 [2021-02-22 02:20:27,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:20:27,524 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2021-02-22 02:20:27,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-02-22 02:20:27,528 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2021-02-22 02:20:27,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-22 02:20:27,533 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:20:27,534 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 02:20:27,534 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-22 02:20:27,534 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:20:27,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:20:27,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1326966967, now seen corresponding path program 1 times [2021-02-22 02:20:27,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:20:27,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630056596] [2021-02-22 02:20:27,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:20:27,546 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:27,548 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-22 02:20:27,552 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:27,559 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-22 02:20:27,564 WARN L141 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size [2021-02-22 02:20:27,568 WARN L147 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size 13 [2021-02-22 02:20:27,572 WARN L141 QuantifierPusher]: treesize reduction 14, result has 68.2 percent of original size [2021-02-22 02:20:27,576 WARN L147 QuantifierPusher]: treesize reduction 14, result has 68.2 percent of original size 30 [2021-02-22 02:20:27,576 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-02-22 02:20:27,593 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-02-22 02:20:27,593 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-22 02:20:27,598 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-22 02:20:27,617 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-02-22 02:20:27,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.02 02:20:27 BoogieIcfgContainer [2021-02-22 02:20:27,617 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-22 02:20:27,619 INFO L168 Benchmark]: Toolchain (without parser) took 5801.00 ms. Allocated memory was 152.0 MB in the beginning and 184.5 MB in the end (delta: 32.5 MB). Free memory was 109.1 MB in the beginning and 75.9 MB in the end (delta: 33.3 MB). Peak memory consumption was 67.3 MB. Max. memory is 8.0 GB. [2021-02-22 02:20:27,620 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 152.0 MB. Free memory was 126.0 MB in the beginning and 125.9 MB in the end (delta: 100.7 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 02:20:27,620 INFO L168 Benchmark]: CACSL2BoogieTranslator took 407.58 ms. Allocated memory is still 152.0 MB. Free memory was 107.9 MB in the beginning and 127.1 MB in the end (delta: -19.2 MB). Peak memory consumption was 5.1 MB. Max. memory is 8.0 GB. [2021-02-22 02:20:27,621 INFO L168 Benchmark]: Boogie Preprocessor took 116.99 ms. Allocated memory is still 152.0 MB. Free memory was 127.1 MB in the beginning and 134.8 MB in the end (delta: -7.7 MB). Peak memory consumption was 2.8 MB. Max. memory is 8.0 GB. [2021-02-22 02:20:27,622 INFO L168 Benchmark]: RCFGBuilder took 655.26 ms. Allocated memory is still 152.0 MB. Free memory was 134.8 MB in the beginning and 115.1 MB in the end (delta: 19.7 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. [2021-02-22 02:20:27,623 INFO L168 Benchmark]: TraceAbstraction took 4597.61 ms. Allocated memory was 152.0 MB in the beginning and 184.5 MB in the end (delta: 32.5 MB). Free memory was 114.4 MB in the beginning and 75.9 MB in the end (delta: 38.6 MB). Peak memory consumption was 72.0 MB. Max. memory is 8.0 GB. [2021-02-22 02:20:27,626 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 152.0 MB. Free memory was 126.0 MB in the beginning and 125.9 MB in the end (delta: 100.7 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 407.58 ms. Allocated memory is still 152.0 MB. Free memory was 107.9 MB in the beginning and 127.1 MB in the end (delta: -19.2 MB). Peak memory consumption was 5.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 116.99 ms. Allocated memory is still 152.0 MB. Free memory was 127.1 MB in the beginning and 134.8 MB in the end (delta: -7.7 MB). Peak memory consumption was 2.8 MB. Max. memory is 8.0 GB. * RCFGBuilder took 655.26 ms. Allocated memory is still 152.0 MB. Free memory was 134.8 MB in the beginning and 115.1 MB in the end (delta: 19.7 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4597.61 ms. Allocated memory was 152.0 MB in the beginning and 184.5 MB in the end (delta: 32.5 MB). Free memory was 114.4 MB in the beginning and 75.9 MB in the end (delta: 38.6 MB). Peak memory consumption was 72.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 15]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L13] COND FALSE !(!cond) [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L27] int i; [L28] long long sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] sum[0] = 1 [L32] i=0 [L32] COND TRUE i