/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/loops/n.c11.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 21:17:26,937 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 21:17:26,940 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 21:17:26,977 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-21 21:17:26,990 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 21:17:26,992 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 21:17:26,993 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 21:17:26,995 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 21:17:26,996 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 21:17:26,997 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 21:17:27,000 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 21:17:27,002 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 21:17:27,008 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 21:17:27,009 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 21:17:27,011 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 21:17:27,012 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 21:17:27,015 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 21:17:27,030 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 21:17:27,034 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 21:17:27,035 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 21:17:27,038 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 21:17:27,065 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 21:17:27,065 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 21:17:27,068 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 21:17:27,068 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 21:17:27,068 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 21:17:27,069 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 21:17:27,069 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 21:17:27,071 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 21:17:27,071 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 21:17:27,071 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 21:17:27,073 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 21:17:27,073 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 21:17:27,074 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 21:17:27,074 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 21:17:27,075 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 21:17:27,076 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 21:17:27,076 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 21:17:27,076 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 21:17:27,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 21:17:27,077 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 21:17:27,077 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 21:17:27,078 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 21:17:27,078 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 21:17:27,506 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 21:17:27,539 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 21:17:27,543 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 21:17:27,545 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 21:17:27,545 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 21:17:27,547 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/n.c11.c [2021-02-21 21:17:27,652 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be27daa0c/f2be79adc0e64a70a2b42aec7cc7f4b5/FLAG795e1c410 [2021-02-21 21:17:28,275 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 21:17:28,276 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/n.c11.c [2021-02-21 21:17:28,284 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be27daa0c/f2be79adc0e64a70a2b42aec7cc7f4b5/FLAG795e1c410 [2021-02-21 21:17:28,689 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be27daa0c/f2be79adc0e64a70a2b42aec7cc7f4b5 [2021-02-21 21:17:28,692 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 21:17:28,708 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 21:17:28,715 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 21:17:28,715 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 21:17:28,720 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 21:17:28,721 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:17:28" (1/1) ... [2021-02-21 21:17:28,723 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e545a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:28, skipping insertion in model container [2021-02-21 21:17:28,723 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:17:28" (1/1) ... [2021-02-21 21:17:28,734 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 21:17:28,751 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 21:17:28,946 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/n.c11.c[317,330] [2021-02-21 21:17:28,964 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:17:28,978 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 21:17:28,993 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/n.c11.c[317,330] [2021-02-21 21:17:29,002 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:17:29,020 INFO L208 MainTranslator]: Completed translation [2021-02-21 21:17:29,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:29 WrapperNode [2021-02-21 21:17:29,021 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 21:17:29,022 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 21:17:29,022 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 21:17:29,022 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 21:17:29,036 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:29" (1/1) ... [2021-02-21 21:17:29,036 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:29" (1/1) ... [2021-02-21 21:17:29,044 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:29" (1/1) ... [2021-02-21 21:17:29,045 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:29" (1/1) ... [2021-02-21 21:17:29,051 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:29" (1/1) ... [2021-02-21 21:17:29,055 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:29" (1/1) ... [2021-02-21 21:17:29,057 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:29" (1/1) ... [2021-02-21 21:17:29,059 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 21:17:29,060 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 21:17:29,060 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 21:17:29,061 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 21:17:29,062 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:29" (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 21:17:29,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 21:17:29,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 21:17:29,166 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 21:17:29,166 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-21 21:17:29,166 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 21:17:29,166 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 21:17:29,167 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 21:17:29,167 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 21:17:29,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 21:17:29,167 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-21 21:17:29,167 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-02-21 21:17:29,167 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 21:17:29,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 21:17:29,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 21:17:29,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 21:17:29,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 21:17:29,168 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 21:17:29,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 21:17:29,510 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 21:17:29,511 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-21 21:17:29,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:17:29 BoogieIcfgContainer [2021-02-21 21:17:29,513 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 21:17:29,517 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 21:17:29,518 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 21:17:29,524 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 21:17:29,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 09:17:28" (1/3) ... [2021-02-21 21:17:29,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6801ac30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:17:29, skipping insertion in model container [2021-02-21 21:17:29,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:29" (2/3) ... [2021-02-21 21:17:29,529 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6801ac30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:17:29, skipping insertion in model container [2021-02-21 21:17:29,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:17:29" (3/3) ... [2021-02-21 21:17:29,531 INFO L111 eAbstractionObserver]: Analyzing ICFG n.c11.c [2021-02-21 21:17:29,548 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 21:17:29,553 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 21:17:29,572 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 21:17:29,594 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 21:17:29,595 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 21:17:29,595 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 21:17:29,595 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 21:17:29,595 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 21:17:29,595 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 21:17:29,595 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 21:17:29,595 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 21:17:29,610 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2021-02-21 21:17:29,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-21 21:17:29,619 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:17:29,621 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] [2021-02-21 21:17:29,621 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:17:29,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:17:29,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1083844101, now seen corresponding path program 1 times [2021-02-21 21:17:29,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:17:29,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301935694] [2021-02-21 21:17:29,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:17:29,797 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:17:29,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:17:30,015 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:30,017 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:30,021 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:30,022 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:30,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:17:30,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:17:30,141 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:30,142 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:30,151 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 21:17:30,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1301935694] [2021-02-21 21:17:30,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:17:30,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-21 21:17:30,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111319125] [2021-02-21 21:17:30,161 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-21 21:17:30,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:17:30,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-21 21:17:30,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-21 21:17:30,180 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2021-02-21 21:17:30,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:17:30,286 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2021-02-21 21:17:30,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-21 21:17:30,288 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2021-02-21 21:17:30,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:17:30,301 INFO L225 Difference]: With dead ends: 49 [2021-02-21 21:17:30,303 INFO L226 Difference]: Without dead ends: 29 [2021-02-21 21:17:30,307 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 21:17:30,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-02-21 21:17:30,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-02-21 21:17:30,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-02-21 21:17:30,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-02-21 21:17:30,370 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 20 [2021-02-21 21:17:30,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:17:30,370 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-02-21 21:17:30,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-21 21:17:30,371 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-02-21 21:17:30,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-21 21:17:30,372 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:17:30,372 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] [2021-02-21 21:17:30,372 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 21:17:30,372 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:17:30,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:17:30,373 INFO L82 PathProgramCache]: Analyzing trace with hash 232671822, now seen corresponding path program 1 times [2021-02-21 21:17:30,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:17:30,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [788889156] [2021-02-21 21:17:30,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:17:30,378 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:17:30,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:17:30,447 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:30,447 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:30,450 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:30,450 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:17:30,454 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:30,455 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:17:30,460 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:30,461 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:17:30,467 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:30,468 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:30,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:17:30,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:17:30,511 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:30,512 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:30,515 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 21:17:30,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [788889156] [2021-02-21 21:17:30,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:17:30,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 21:17:30,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620795307] [2021-02-21 21:17:30,517 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 21:17:30,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:17:30,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 21:17:30,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-21 21:17:30,519 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 6 states. [2021-02-21 21:17:30,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:17:30,756 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2021-02-21 21:17:30,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-21 21:17:30,757 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2021-02-21 21:17:30,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:17:30,758 INFO L225 Difference]: With dead ends: 53 [2021-02-21 21:17:30,758 INFO L226 Difference]: Without dead ends: 35 [2021-02-21 21:17:30,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-02-21 21:17:30,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-02-21 21:17:30,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2021-02-21 21:17:30,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-02-21 21:17:30,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-02-21 21:17:30,791 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 21 [2021-02-21 21:17:30,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:17:30,792 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-02-21 21:17:30,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 21:17:30,795 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-02-21 21:17:30,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-21 21:17:30,798 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:17:30,798 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] [2021-02-21 21:17:30,798 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 21:17:30,799 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:17:30,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:17:30,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1436452214, now seen corresponding path program 1 times [2021-02-21 21:17:30,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:17:30,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [210427459] [2021-02-21 21:17:30,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:17:31,311 WARN L202 SmtUtils]: Spent 488.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-02-21 21:17:31,327 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:17:31,329 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:17:31,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:17:31,475 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:31,476 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:31,477 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:31,479 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:17:31,482 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:31,483 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:17:31,500 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-21 21:17:31,502 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-21 21:17:31,524 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:31,525 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:17:31,533 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:31,534 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:17:31,540 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:31,541 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:31,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:17:31,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:17:31,612 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:31,613 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:31,621 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 21:17:31,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [210427459] [2021-02-21 21:17:31,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:17:31,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-21 21:17:31,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273432940] [2021-02-21 21:17:31,623 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-21 21:17:31,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:17:31,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-21 21:17:31,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-02-21 21:17:31,627 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 8 states. [2021-02-21 21:17:31,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:17:31,952 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2021-02-21 21:17:31,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-21 21:17:31,953 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2021-02-21 21:17:31,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:17:31,955 INFO L225 Difference]: With dead ends: 60 [2021-02-21 21:17:31,955 INFO L226 Difference]: Without dead ends: 42 [2021-02-21 21:17:31,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-02-21 21:17:31,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-02-21 21:17:31,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2021-02-21 21:17:31,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-02-21 21:17:31,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-02-21 21:17:31,969 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 28 [2021-02-21 21:17:31,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:17:31,969 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-02-21 21:17:31,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-21 21:17:31,970 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-02-21 21:17:31,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-21 21:17:31,971 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:17:31,971 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:17:31,971 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 21:17:31,972 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:17:31,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:17:31,972 INFO L82 PathProgramCache]: Analyzing trace with hash -161157810, now seen corresponding path program 2 times [2021-02-21 21:17:31,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:17:31,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1111225391] [2021-02-21 21:17:31,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:17:32,367 WARN L202 SmtUtils]: Spent 386.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-02-21 21:17:32,799 WARN L202 SmtUtils]: Spent 425.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-02-21 21:17:32,804 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:17:32,811 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:17:32,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:17:32,969 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:32,970 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:32,971 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:32,971 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:17:32,974 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:32,976 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:17:32,982 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:32,983 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:17:32,991 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:32,992 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:17:33,003 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-21 21:17:33,005 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-21 21:17:33,027 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:33,028 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:17:33,036 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:33,037 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:17:33,048 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:33,049 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:33,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:17:33,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:17:33,087 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:33,088 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:33,091 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 21:17:33,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1111225391] [2021-02-21 21:17:33,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:17:33,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-21 21:17:33,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193489097] [2021-02-21 21:17:33,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-21 21:17:33,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:17:33,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-21 21:17:33,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-02-21 21:17:33,094 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 10 states. [2021-02-21 21:17:33,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:17:33,601 INFO L93 Difference]: Finished difference Result 74 states and 78 transitions. [2021-02-21 21:17:33,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-21 21:17:33,603 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2021-02-21 21:17:33,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:17:33,607 INFO L225 Difference]: With dead ends: 74 [2021-02-21 21:17:33,607 INFO L226 Difference]: Without dead ends: 49 [2021-02-21 21:17:33,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-02-21 21:17:33,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-02-21 21:17:33,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2021-02-21 21:17:33,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-02-21 21:17:33,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2021-02-21 21:17:33,630 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 35 [2021-02-21 21:17:33,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:17:33,630 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2021-02-21 21:17:33,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-21 21:17:33,631 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2021-02-21 21:17:33,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-21 21:17:33,632 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:17:33,632 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:17:33,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 21:17:33,632 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:17:33,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:17:33,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1240105590, now seen corresponding path program 3 times [2021-02-21 21:17:33,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:17:33,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [209411793] [2021-02-21 21:17:33,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:17:34,023 WARN L202 SmtUtils]: Spent 384.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-02-21 21:17:34,458 WARN L202 SmtUtils]: Spent 428.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-02-21 21:17:34,460 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:17:34,461 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:17:34,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:17:34,521 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:34,522 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:34,523 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:34,523 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:17:34,526 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:34,527 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:17:34,531 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:34,532 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:17:34,541 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:34,542 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:17:34,550 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:34,551 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:17:34,571 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:34,573 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:17:34,587 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-21 21:17:34,588 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-21 21:17:34,620 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:34,621 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:17:34,632 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:34,633 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:17:34,648 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:34,649 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:34,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:17:34,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:17:34,715 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:34,716 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:34,720 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 21:17:34,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [209411793] [2021-02-21 21:17:34,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:17:34,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-02-21 21:17:34,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296643445] [2021-02-21 21:17:34,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-21 21:17:34,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:17:34,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-21 21:17:34,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-02-21 21:17:34,723 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 12 states. [2021-02-21 21:17:35,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:17:35,479 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2021-02-21 21:17:35,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-21 21:17:35,483 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2021-02-21 21:17:35,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:17:35,485 INFO L225 Difference]: With dead ends: 88 [2021-02-21 21:17:35,485 INFO L226 Difference]: Without dead ends: 56 [2021-02-21 21:17:35,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-02-21 21:17:35,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-02-21 21:17:35,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2021-02-21 21:17:35,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-02-21 21:17:35,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-02-21 21:17:35,501 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 42 [2021-02-21 21:17:35,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:17:35,501 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-02-21 21:17:35,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-21 21:17:35,502 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-02-21 21:17:35,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-02-21 21:17:35,503 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:17:35,503 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:17:35,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-21 21:17:35,504 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:17:35,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:17:35,504 INFO L82 PathProgramCache]: Analyzing trace with hash 823283790, now seen corresponding path program 4 times [2021-02-21 21:17:35,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:17:35,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [752831987] [2021-02-21 21:17:35,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:17:35,926 WARN L202 SmtUtils]: Spent 415.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-02-21 21:17:36,367 WARN L202 SmtUtils]: Spent 435.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-02-21 21:17:36,371 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:17:36,372 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:17:36,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:17:36,441 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:36,442 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:36,443 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:36,443 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:17:36,447 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:36,447 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:17:36,452 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:36,453 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:17:36,461 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:36,462 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:17:36,471 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:36,472 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:17:36,483 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:36,484 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:17:36,502 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:36,503 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:17:36,516 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:36,517 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:17:36,534 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-21 21:17:36,536 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-21 21:17:36,572 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:36,573 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:17:36,587 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:36,589 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:17:36,604 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:36,605 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:36,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:17:36,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:17:36,657 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:36,658 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:36,664 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 21:17:36,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [752831987] [2021-02-21 21:17:36,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:17:36,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-02-21 21:17:36,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233087304] [2021-02-21 21:17:36,666 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-21 21:17:36,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:17:36,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-21 21:17:36,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-02-21 21:17:36,667 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 14 states. [2021-02-21 21:17:37,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:17:37,561 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2021-02-21 21:17:37,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-21 21:17:37,562 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2021-02-21 21:17:37,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:17:37,563 INFO L225 Difference]: With dead ends: 70 [2021-02-21 21:17:37,563 INFO L226 Difference]: Without dead ends: 64 [2021-02-21 21:17:37,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2021-02-21 21:17:37,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-02-21 21:17:37,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2021-02-21 21:17:37,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-02-21 21:17:37,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2021-02-21 21:17:37,581 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 49 [2021-02-21 21:17:37,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:17:37,582 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2021-02-21 21:17:37,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-02-21 21:17:37,582 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2021-02-21 21:17:37,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-02-21 21:17:37,583 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:17:37,584 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:17:37,584 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-21 21:17:37,584 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:17:37,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:17:37,585 INFO L82 PathProgramCache]: Analyzing trace with hash 922206070, now seen corresponding path program 5 times [2021-02-21 21:17:37,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:17:37,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2024702154] [2021-02-21 21:17:37,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:17:38,014 WARN L202 SmtUtils]: Spent 420.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-02-21 21:17:38,427 WARN L202 SmtUtils]: Spent 405.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-02-21 21:17:38,428 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:17:38,430 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:17:38,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:17:38,505 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:38,506 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:38,507 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:38,507 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:17:38,511 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:38,511 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:17:38,516 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:38,517 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:17:38,525 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:38,526 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:17:38,534 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:38,535 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:17:38,548 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:38,550 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:17:38,569 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:38,570 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:17:38,584 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:38,587 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:17:38,612 WARN L141 QuantifierPusher]: treesize reduction 13, result has 82.9 percent of original size [2021-02-21 21:17:38,616 WARN L147 QuantifierPusher]: treesize reduction 13, result has 82.9 percent of original size 63 [2021-02-21 21:17:38,668 WARN L141 QuantifierPusher]: treesize reduction 25, result has 66.2 percent of original size [2021-02-21 21:17:38,673 WARN L147 QuantifierPusher]: treesize reduction 25, result has 66.2 percent of original size 49 [2021-02-21 21:17:38,679 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:38,680 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:38,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:17:38,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:17:38,725 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:38,726 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:38,733 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 21:17:38,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2024702154] [2021-02-21 21:17:38,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:17:38,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-02-21 21:17:38,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729067045] [2021-02-21 21:17:38,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-21 21:17:38,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:17:38,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-21 21:17:38,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-02-21 21:17:38,736 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 12 states. [2021-02-21 21:17:39,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:17:39,461 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2021-02-21 21:17:39,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-21 21:17:39,462 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 56 [2021-02-21 21:17:39,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:17:39,464 INFO L225 Difference]: With dead ends: 87 [2021-02-21 21:17:39,464 INFO L226 Difference]: Without dead ends: 0 [2021-02-21 21:17:39,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-02-21 21:17:39,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-21 21:17:39,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-21 21:17:39,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-21 21:17:39,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-21 21:17:39,467 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 56 [2021-02-21 21:17:39,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:17:39,467 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-21 21:17:39,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-21 21:17:39,468 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-21 21:17:39,468 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-21 21:17:39,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-21 21:17:39,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-21 21:17:40,080 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 27 [2021-02-21 21:17:40,250 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 25 [2021-02-21 21:17:40,593 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-21 21:17:40,593 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-21 21:17:40,593 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-21 21:17:40,593 INFO L192 CegarLoopUtils]: At program point L3-2(line 3) the Hoare annotation is: true [2021-02-21 21:17:40,594 INFO L192 CegarLoopUtils]: At program point L3-3(line 3) the Hoare annotation is: true [2021-02-21 21:17:40,594 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-21 21:17:40,594 INFO L192 CegarLoopUtils]: At program point L3-4(line 3) the Hoare annotation is: true [2021-02-21 21:17:40,594 INFO L192 CegarLoopUtils]: At program point L-1-1(line -1) the Hoare annotation is: true [2021-02-21 21:17:40,594 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line 3) the Hoare annotation is: true [2021-02-21 21:17:40,594 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-02-21 21:17:40,594 INFO L192 CegarLoopUtils]: At program point L3(line 3) the Hoare annotation is: true [2021-02-21 21:17:40,594 INFO L192 CegarLoopUtils]: At program point L3-1(line 3) the Hoare annotation is: true [2021-02-21 21:17:40,595 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-02-21 21:17:40,595 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-02-21 21:17:40,595 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-21 21:17:40,595 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-21 21:17:40,595 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-02-21 21:17:40,595 INFO L192 CegarLoopUtils]: At program point mainEXIT(lines 14 34) the Hoare annotation is: true [2021-02-21 21:17:40,595 INFO L185 CegarLoopUtils]: At program point L23(lines 23 24) the Hoare annotation is: (or (and (<= 4 main_~len~0) (<= main_~len~0 4)) (and (<= main_~len~0 3) (< 0 (+ (div main_~len~0 4294967296) 1)))) [2021-02-21 21:17:40,596 INFO L185 CegarLoopUtils]: At program point L23-2(lines 23 24) the Hoare annotation is: (or (= main_~len~0 0) (and (<= main_~len~0 1) (<= 1 main_~len~0)) (and (<= main_~len~0 2) (<= 2 main_~len~0)) (and (<= main_~len~0 3) (<= 3 main_~len~0))) [2021-02-21 21:17:40,596 INFO L185 CegarLoopUtils]: At program point L21-1(line 21) the Hoare annotation is: (and (< 0 (+ (div main_~len~0 4294967296) 1)) (<= main_~len~0 4)) [2021-02-21 21:17:40,596 INFO L185 CegarLoopUtils]: At program point L21-3(line 21) the Hoare annotation is: (or (and (<= 4 main_~len~0) (<= main_~len~0 4)) (and (<= main_~len~0 3) (< 0 (+ (div main_~len~0 4294967296) 1)))) [2021-02-21 21:17:40,596 INFO L185 CegarLoopUtils]: At program point L21-4(lines 21 29) the Hoare annotation is: (and (< 0 (+ (div main_~len~0 4294967296) 1)) (<= main_~len~0 4)) [2021-02-21 21:17:40,596 INFO L185 CegarLoopUtils]: At program point L21-5(lines 21 29) the Hoare annotation is: (and (< 0 (+ (div main_~len~0 4294967296) 1)) (<= main_~len~0 4)) [2021-02-21 21:17:40,596 INFO L192 CegarLoopUtils]: At program point mainFINAL(lines 14 34) the Hoare annotation is: true [2021-02-21 21:17:40,596 INFO L192 CegarLoopUtils]: At program point L30(line 30) the Hoare annotation is: true [2021-02-21 21:17:40,597 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 14 34) the Hoare annotation is: true [2021-02-21 21:17:40,597 INFO L185 CegarLoopUtils]: At program point L28(line 28) the Hoare annotation is: (or (= main_~len~0 0) (and (<= main_~len~0 1) (<= 1 main_~len~0)) (and (<= main_~len~0 2) (<= 2 main_~len~0)) (and (<= main_~len~0 3) (<= 3 main_~len~0))) [2021-02-21 21:17:40,597 INFO L185 CegarLoopUtils]: At program point L28-1(line 28) the Hoare annotation is: (or (and (<= main_~len~0 2) (<= 2 |main_#t~post8|) (<= 2 main_~len~0) (<= |main_#t~post8| 2)) (and (= |main_#t~post8| 0) (= main_~len~0 0)) (and (<= |main_#t~post8| 3) (<= main_~len~0 3) (<= 3 main_~len~0) (<= 3 |main_#t~post8|)) (and (<= |main_#t~post8| 1) (<= 1 |main_#t~post8|) (<= main_~len~0 1) (<= 1 main_~len~0))) [2021-02-21 21:17:40,597 INFO L185 CegarLoopUtils]: At program point L28-2(line 28) the Hoare annotation is: (or (and (<= |main_#t~post8| 3) (<= 4 main_~len~0) (<= main_~len~0 4) (<= 3 |main_#t~post8|)) (and (<= main_~len~0 2) (<= 2 main_~len~0) (<= |main_#t~post8| 1) (<= 1 |main_#t~post8|)) (and (<= 2 |main_#t~post8|) (<= main_~len~0 3) (<= |main_#t~post8| 2) (<= 3 main_~len~0)) (and (= |main_#t~post8| 0) (<= main_~len~0 1) (<= 1 main_~len~0))) [2021-02-21 21:17:40,597 INFO L185 CegarLoopUtils]: At program point L24(line 24) the Hoare annotation is: (and (<= 4 main_~len~0) (<= main_~len~0 4)) [2021-02-21 21:17:40,598 INFO L185 CegarLoopUtils]: At program point L18(line 18) the Hoare annotation is: (= main_~len~0 0) [2021-02-21 21:17:40,598 INFO L192 CegarLoopUtils]: At program point L16(line 16) the Hoare annotation is: true [2021-02-21 21:17:40,598 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2021-02-21 21:17:40,598 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertEXIT(lines 5 10) the Hoare annotation is: true [2021-02-21 21:17:40,598 INFO L185 CegarLoopUtils]: At program point L7(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-21 21:17:40,598 INFO L185 CegarLoopUtils]: At program point L6(lines 6 8) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-02-21 21:17:40,598 INFO L185 CegarLoopUtils]: At program point L7-1(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-21 21:17:40,599 INFO L192 CegarLoopUtils]: At program point L6-2(lines 5 10) the Hoare annotation is: true [2021-02-21 21:17:40,599 INFO L185 CegarLoopUtils]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-21 21:17:40,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 09:17:40 BoogieIcfgContainer [2021-02-21 21:17:40,616 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 21:17:40,617 INFO L168 Benchmark]: Toolchain (without parser) took 11921.75 ms. Allocated memory was 161.5 MB in the beginning and 232.8 MB in the end (delta: 71.3 MB). Free memory was 136.4 MB in the beginning and 96.2 MB in the end (delta: 40.2 MB). Peak memory consumption was 128.6 MB. Max. memory is 8.0 GB. [2021-02-21 21:17:40,618 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 125.8 MB. Free memory is still 82.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 21:17:40,619 INFO L168 Benchmark]: CACSL2BoogieTranslator took 305.88 ms. Allocated memory is still 161.5 MB. Free memory was 135.3 MB in the beginning and 125.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-21 21:17:40,619 INFO L168 Benchmark]: Boogie Preprocessor took 37.58 ms. Allocated memory is still 161.5 MB. Free memory was 125.9 MB in the beginning and 124.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-21 21:17:40,620 INFO L168 Benchmark]: RCFGBuilder took 452.57 ms. Allocated memory is still 161.5 MB. Free memory was 124.5 MB in the beginning and 110.5 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-02-21 21:17:40,621 INFO L168 Benchmark]: TraceAbstraction took 11098.61 ms. Allocated memory was 161.5 MB in the beginning and 232.8 MB in the end (delta: 71.3 MB). Free memory was 110.1 MB in the beginning and 96.2 MB in the end (delta: 13.9 MB). Peak memory consumption was 102.4 MB. Max. memory is 8.0 GB. [2021-02-21 21:17:40,623 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 125.8 MB. Free memory is still 82.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 305.88 ms. Allocated memory is still 161.5 MB. Free memory was 135.3 MB in the beginning and 125.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 37.58 ms. Allocated memory is still 161.5 MB. Free memory was 125.9 MB in the beginning and 124.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 452.57 ms. Allocated memory is still 161.5 MB. Free memory was 124.5 MB in the beginning and 110.5 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 11098.61 ms. Allocated memory was 161.5 MB in the beginning and 232.8 MB in the end (delta: 71.3 MB). Free memory was 110.1 MB in the beginning and 96.2 MB in the end (delta: 13.9 MB). Peak memory consumption was 102.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: 0 < len / 4294967296 + 1 && len <= 4 - ProcedureContractResult [Line: 14]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 5]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 9.8s, OverallIterations: 7, TraceHistogramMax: 5, AutomataDifference: 3.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 209 SDtfs, 335 SDslu, 567 SDs, 0 SdLazy, 1248 SolverSat, 69 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 131 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 2.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=58occurred in iteration=6, 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, 7 MinimizatonAttempts, 18 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 37 LocationsWithAnnotation, 107 PreInvPairs, 174 NumberOfFragments, 297 HoareAnnotationTreeSize, 107 FomulaSimplifications, 5598 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 37 FomulaSimplificationsInter, 1808 FormulaSimplificationTreeSizeReductionInter, 0.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...