/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-crafted-1/nested5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 21:32:23,343 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 21:32:23,348 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 21:32:23,410 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-21 21:32:23,462 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 21:32:23,465 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 21:32:23,474 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 21:32:23,477 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 21:32:23,480 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 21:32:23,482 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 21:32:23,490 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 21:32:23,501 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 21:32:23,504 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 21:32:23,506 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 21:32:23,508 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 21:32:23,511 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 21:32:23,523 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 21:32:23,536 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 21:32:23,537 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 21:32:23,538 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 21:32:23,540 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 21:32:23,565 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 21:32:23,565 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 21:32:23,570 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 21:32:23,571 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 21:32:23,571 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 21:32:23,572 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 21:32:23,572 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 21:32:23,572 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 21:32:23,572 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 21:32:23,573 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 21:32:23,574 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 21:32:23,574 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 21:32:23,575 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 21:32:23,575 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 21:32:23,576 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 21:32:23,576 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 21:32:23,576 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 21:32:23,577 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 21:32:23,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 21:32:23,577 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 21:32:23,578 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 21:32:23,578 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 21:32:23,578 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 21:32:24,038 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 21:32:24,073 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 21:32:24,077 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 21:32:24,079 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 21:32:24,079 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 21:32:24,081 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested5-1.c [2021-02-21 21:32:24,159 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d40fa5362/01c6016ad5514880a541ad754883f3af/FLAGdc36b84bc [2021-02-21 21:32:24,698 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 21:32:24,698 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested5-1.c [2021-02-21 21:32:24,705 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d40fa5362/01c6016ad5514880a541ad754883f3af/FLAGdc36b84bc [2021-02-21 21:32:25,053 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d40fa5362/01c6016ad5514880a541ad754883f3af [2021-02-21 21:32:25,056 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 21:32:25,076 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 21:32:25,083 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 21:32:25,083 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 21:32:25,088 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 21:32:25,089 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:32:25" (1/1) ... [2021-02-21 21:32:25,090 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a264771 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:32:25, skipping insertion in model container [2021-02-21 21:32:25,091 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:32:25" (1/1) ... [2021-02-21 21:32:25,101 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 21:32:25,123 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 21:32:25,319 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-crafted-1/nested5-1.c[321,334] [2021-02-21 21:32:25,336 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:32:25,347 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 21:32:25,361 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-crafted-1/nested5-1.c[321,334] [2021-02-21 21:32:25,367 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:32:25,384 INFO L208 MainTranslator]: Completed translation [2021-02-21 21:32:25,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:32:25 WrapperNode [2021-02-21 21:32:25,385 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 21:32:25,386 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 21:32:25,386 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 21:32:25,386 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 21:32:25,400 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:32:25" (1/1) ... [2021-02-21 21:32:25,401 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:32:25" (1/1) ... [2021-02-21 21:32:25,409 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:32:25" (1/1) ... [2021-02-21 21:32:25,409 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:32:25" (1/1) ... [2021-02-21 21:32:25,415 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:32:25" (1/1) ... [2021-02-21 21:32:25,422 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:32:25" (1/1) ... [2021-02-21 21:32:25,423 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:32:25" (1/1) ... [2021-02-21 21:32:25,426 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 21:32:25,427 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 21:32:25,427 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 21:32:25,427 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 21:32:25,428 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:32:25" (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 21:32:25,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 21:32:25,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 21:32:25,599 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 21:32:25,599 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-21 21:32:25,599 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 21:32:25,599 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 21:32:25,600 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 21:32:25,600 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 21:32:25,600 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 21:32:25,600 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-21 21:32:25,600 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 21:32:25,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 21:32:25,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 21:32:25,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 21:32:25,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 21:32:25,601 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 21:32:25,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 21:32:25,922 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 21:32:25,922 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-02-21 21:32:25,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:32:25 BoogieIcfgContainer [2021-02-21 21:32:25,925 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 21:32:25,927 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 21:32:25,927 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 21:32:25,931 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 21:32:25,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 09:32:25" (1/3) ... [2021-02-21 21:32:25,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c3961db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:32:25, skipping insertion in model container [2021-02-21 21:32:25,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:32:25" (2/3) ... [2021-02-21 21:32:25,933 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c3961db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:32:25, skipping insertion in model container [2021-02-21 21:32:25,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:32:25" (3/3) ... [2021-02-21 21:32:25,935 INFO L111 eAbstractionObserver]: Analyzing ICFG nested5-1.c [2021-02-21 21:32:25,943 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 21:32:25,949 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 21:32:25,998 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 21:32:26,050 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 21:32:26,050 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 21:32:26,050 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 21:32:26,051 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 21:32:26,051 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 21:32:26,051 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 21:32:26,051 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 21:32:26,051 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 21:32:26,079 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states. [2021-02-21 21:32:26,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-21 21:32:26,093 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:32:26,094 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:32:26,095 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:32:26,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:32:26,103 INFO L82 PathProgramCache]: Analyzing trace with hash -2146802473, now seen corresponding path program 1 times [2021-02-21 21:32:26,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:32:26,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [893914110] [2021-02-21 21:32:26,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:32:26,215 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:32:26,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:32:26,445 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:26,446 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:32:26,448 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:26,449 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:32:26,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:32:26,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:32:26,519 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:26,520 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:32:26,529 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 21:32:26,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [893914110] [2021-02-21 21:32:26,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:32:26,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-21 21:32:26,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599157150] [2021-02-21 21:32:26,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-21 21:32:26,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:32:26,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-21 21:32:26,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-21 21:32:26,562 INFO L87 Difference]: Start difference. First operand 55 states. Second operand 3 states. [2021-02-21 21:32:26,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:32:26,673 INFO L93 Difference]: Finished difference Result 91 states and 112 transitions. [2021-02-21 21:32:26,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-21 21:32:26,676 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2021-02-21 21:32:26,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:32:26,684 INFO L225 Difference]: With dead ends: 91 [2021-02-21 21:32:26,685 INFO L226 Difference]: Without dead ends: 49 [2021-02-21 21:32:26,688 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 21:32:26,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-02-21 21:32:26,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-02-21 21:32:26,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-02-21 21:32:26,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2021-02-21 21:32:26,746 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 31 [2021-02-21 21:32:26,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:32:26,747 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2021-02-21 21:32:26,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-21 21:32:26,747 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2021-02-21 21:32:26,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-21 21:32:26,749 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:32:26,749 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:32:26,749 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 21:32:26,750 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:32:26,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:32:26,751 INFO L82 PathProgramCache]: Analyzing trace with hash 2140776655, now seen corresponding path program 1 times [2021-02-21 21:32:26,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:32:26,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2060336347] [2021-02-21 21:32:26,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:32:26,755 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:32:26,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:32:26,862 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:26,863 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:32:26,864 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:26,865 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:32:26,881 WARN L141 QuantifierPusher]: treesize reduction 1, result has 97.4 percent of original size [2021-02-21 21:32:26,883 WARN L147 QuantifierPusher]: treesize reduction 1, result has 97.4 percent of original size 38 [2021-02-21 21:32:26,887 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:26,888 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:32:26,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:32:26,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:32:26,928 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:26,929 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:32:26,932 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 21:32:26,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2060336347] [2021-02-21 21:32:26,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:32:26,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 21:32:26,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928606089] [2021-02-21 21:32:26,935 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 21:32:26,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:32:26,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 21:32:26,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 21:32:26,937 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 4 states. [2021-02-21 21:32:27,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:32:27,173 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2021-02-21 21:32:27,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 21:32:27,174 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2021-02-21 21:32:27,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:32:27,176 INFO L225 Difference]: With dead ends: 100 [2021-02-21 21:32:27,176 INFO L226 Difference]: Without dead ends: 69 [2021-02-21 21:32:27,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 21:32:27,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-02-21 21:32:27,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 50. [2021-02-21 21:32:27,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-02-21 21:32:27,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2021-02-21 21:32:27,202 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 31 [2021-02-21 21:32:27,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:32:27,203 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2021-02-21 21:32:27,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 21:32:27,205 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2021-02-21 21:32:27,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-21 21:32:27,208 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:32:27,208 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] [2021-02-21 21:32:27,210 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 21:32:27,211 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:32:27,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:32:27,216 INFO L82 PathProgramCache]: Analyzing trace with hash 619271948, now seen corresponding path program 1 times [2021-02-21 21:32:27,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:32:27,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430928700] [2021-02-21 21:32:27,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:32:27,670 WARN L202 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 83 [2021-02-21 21:32:27,685 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:27,692 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 254 [2021-02-21 21:32:28,003 WARN L202 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 83 [2021-02-21 21:32:28,012 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:28,017 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 214 [2021-02-21 21:32:28,302 WARN L202 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 77 [2021-02-21 21:32:28,310 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:28,317 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 214 [2021-02-21 21:32:28,318 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-21 21:32:28,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:32:28,501 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:28,502 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:32:28,502 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:28,503 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:32:28,506 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:28,507 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:32:28,511 WARN L141 QuantifierPusher]: treesize reduction 12, result has 36.8 percent of original size [2021-02-21 21:32:28,512 WARN L147 QuantifierPusher]: treesize reduction 12, result has 36.8 percent of original size 7 [2021-02-21 21:32:28,520 WARN L141 QuantifierPusher]: treesize reduction 32, result has 79.1 percent of original size [2021-02-21 21:32:28,523 WARN L147 QuantifierPusher]: treesize reduction 32, result has 79.1 percent of original size 121 [2021-02-21 21:32:28,562 WARN L141 QuantifierPusher]: treesize reduction 62, result has 34.0 percent of original size [2021-02-21 21:32:28,566 WARN L147 QuantifierPusher]: treesize reduction 62, result has 34.0 percent of original size 32 [2021-02-21 21:32:28,631 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:28,633 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 21:32:28,644 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:28,645 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 21:32:28,657 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:28,659 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:32:28,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:32:28,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:32:28,705 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:28,706 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:32:28,710 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 21:32:28,730 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:28,743 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 259 [2021-02-21 21:32:28,759 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:28,762 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 219 [2021-02-21 21:32:28,765 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:28,767 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 21:32:28,770 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:28,773 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:32:28,787 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:28,790 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:32:28,805 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:28,806 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:32:28,825 WARN L141 QuantifierPusher]: treesize reduction 12, result has 7.7 percent of original size [2021-02-21 21:32:28,826 WARN L147 QuantifierPusher]: treesize reduction 12, result has 7.7 percent of original size 1 [2021-02-21 21:32:28,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430928700] [2021-02-21 21:32:28,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:32:28,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-21 21:32:28,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543059277] [2021-02-21 21:32:28,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-21 21:32:28,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:32:28,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-21 21:32:28,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-02-21 21:32:28,829 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 10 states. [2021-02-21 21:32:29,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:32:29,286 INFO L93 Difference]: Finished difference Result 105 states and 117 transitions. [2021-02-21 21:32:29,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-21 21:32:29,287 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2021-02-21 21:32:29,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:32:29,288 INFO L225 Difference]: With dead ends: 105 [2021-02-21 21:32:29,289 INFO L226 Difference]: Without dead ends: 73 [2021-02-21 21:32:29,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-02-21 21:32:29,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-02-21 21:32:29,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2021-02-21 21:32:29,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-02-21 21:32:29,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2021-02-21 21:32:29,308 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 35 [2021-02-21 21:32:29,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:32:29,309 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2021-02-21 21:32:29,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-21 21:32:29,309 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2021-02-21 21:32:29,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-21 21:32:29,311 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:32:29,311 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:32:29,311 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 21:32:29,311 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:32:29,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:32:29,312 INFO L82 PathProgramCache]: Analyzing trace with hash 571317961, now seen corresponding path program 2 times [2021-02-21 21:32:29,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:32:29,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1800172411] [2021-02-21 21:32:29,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:32:29,792 WARN L202 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 83 [2021-02-21 21:32:29,801 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:29,805 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 214 [2021-02-21 21:32:30,115 WARN L202 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 83 [2021-02-21 21:32:30,126 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:30,130 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 254 [2021-02-21 21:32:30,430 WARN L202 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 77 [2021-02-21 21:32:30,435 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:30,438 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 214 [2021-02-21 21:32:30,439 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-21 21:32:30,609 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 26 [2021-02-21 21:32:30,611 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:30,613 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-02-21 21:32:30,785 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 26 [2021-02-21 21:32:30,788 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:30,790 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-02-21 21:32:30,939 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 25 [2021-02-21 21:32:30,940 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:30,941 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-02-21 21:32:30,942 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-21 21:32:30,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:32:31,039 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:31,040 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:32:31,041 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:31,041 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:32:31,047 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:31,048 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:32:31,058 WARN L141 QuantifierPusher]: treesize reduction 21, result has 25.0 percent of original size [2021-02-21 21:32:31,059 WARN L147 QuantifierPusher]: treesize reduction 21, result has 25.0 percent of original size 7 [2021-02-21 21:32:31,066 WARN L141 QuantifierPusher]: treesize reduction 32, result has 61.9 percent of original size [2021-02-21 21:32:31,069 WARN L147 QuantifierPusher]: treesize reduction 32, result has 61.9 percent of original size 52 [2021-02-21 21:32:31,118 WARN L141 QuantifierPusher]: treesize reduction 31, result has 56.9 percent of original size [2021-02-21 21:32:31,120 WARN L147 QuantifierPusher]: treesize reduction 31, result has 56.9 percent of original size 41 [2021-02-21 21:32:31,155 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:31,156 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 21:32:31,165 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:31,167 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 21:32:31,177 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:31,177 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:32:31,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:32:31,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:32:31,216 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:31,216 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:32:31,220 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 21:32:31,224 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:31,226 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 219 [2021-02-21 21:32:31,230 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:31,232 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 259 [2021-02-21 21:32:31,235 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:31,235 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 21:32:31,238 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:31,239 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:32:31,252 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:31,254 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:32:31,269 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:31,270 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:32:31,282 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:31,283 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 21:32:31,306 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:31,307 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:32:31,324 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:31,326 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:32:31,345 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:31,346 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:32:31,361 WARN L141 QuantifierPusher]: treesize reduction 12, result has 7.7 percent of original size [2021-02-21 21:32:31,363 WARN L147 QuantifierPusher]: treesize reduction 12, result has 7.7 percent of original size 1 [2021-02-21 21:32:31,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1800172411] [2021-02-21 21:32:31,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:32:31,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-02-21 21:32:31,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732357265] [2021-02-21 21:32:31,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-21 21:32:31,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:32:31,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-21 21:32:31,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-02-21 21:32:31,366 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 13 states. [2021-02-21 21:32:31,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:32:31,957 INFO L93 Difference]: Finished difference Result 113 states and 125 transitions. [2021-02-21 21:32:31,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-21 21:32:31,958 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2021-02-21 21:32:31,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:32:31,960 INFO L225 Difference]: With dead ends: 113 [2021-02-21 21:32:31,960 INFO L226 Difference]: Without dead ends: 77 [2021-02-21 21:32:31,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-02-21 21:32:31,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-02-21 21:32:31,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 58. [2021-02-21 21:32:31,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-02-21 21:32:31,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2021-02-21 21:32:31,978 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 39 [2021-02-21 21:32:31,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:32:31,979 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2021-02-21 21:32:31,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-02-21 21:32:31,979 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2021-02-21 21:32:31,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-02-21 21:32:31,980 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:32:31,980 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:32:31,981 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 21:32:31,981 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:32:31,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:32:31,981 INFO L82 PathProgramCache]: Analyzing trace with hash -534921210, now seen corresponding path program 3 times [2021-02-21 21:32:31,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:32:31,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [864409729] [2021-02-21 21:32:31,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:32:32,478 WARN L202 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 83 [2021-02-21 21:32:32,487 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:32,490 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 254 [2021-02-21 21:32:32,769 WARN L202 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 77 [2021-02-21 21:32:32,775 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:32,777 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 214 [2021-02-21 21:32:33,091 WARN L202 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 83 [2021-02-21 21:32:33,098 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:33,103 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 214 [2021-02-21 21:32:33,104 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-21 21:32:33,258 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 26 [2021-02-21 21:32:33,260 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:33,261 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-02-21 21:32:33,426 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:33,427 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-02-21 21:32:33,597 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 26 [2021-02-21 21:32:33,599 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:33,601 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-02-21 21:32:33,602 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-21 21:32:33,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:32:33,742 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:33,743 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:32:33,743 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:33,744 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:32:33,747 WARN L141 QuantifierPusher]: treesize reduction 12, result has 36.8 percent of original size [2021-02-21 21:32:33,748 WARN L147 QuantifierPusher]: treesize reduction 12, result has 36.8 percent of original size 7 [2021-02-21 21:32:33,752 WARN L141 QuantifierPusher]: treesize reduction 4, result has 85.2 percent of original size [2021-02-21 21:32:33,753 WARN L147 QuantifierPusher]: treesize reduction 4, result has 85.2 percent of original size 23 [2021-02-21 21:32:33,789 WARN L141 QuantifierPusher]: treesize reduction 3, result has 96.5 percent of original size [2021-02-21 21:32:33,792 WARN L147 QuantifierPusher]: treesize reduction 3, result has 96.5 percent of original size 82 [2021-02-21 21:32:33,850 WARN L141 QuantifierPusher]: treesize reduction 31, result has 64.0 percent of original size [2021-02-21 21:32:33,851 WARN L147 QuantifierPusher]: treesize reduction 31, result has 64.0 percent of original size 55 [2021-02-21 21:32:33,882 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:33,883 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 21:32:33,892 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:33,893 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 21:32:33,905 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:33,906 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:32:33,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:32:33,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:32:33,949 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:33,950 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:32:33,953 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 21:32:33,960 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:33,961 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 259 [2021-02-21 21:32:33,965 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:33,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:32:33,969 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:33,972 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 230 [2021-02-21 21:32:33,975 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 231 [2021-02-21 21:32:33,988 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:33,989 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 21:32:33,992 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:33,992 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:32:34,005 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:34,007 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:32:34,020 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:34,021 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:32:34,032 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:34,033 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 21:32:34,045 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:34,046 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:32:34,060 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:34,063 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:32:34,080 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:34,085 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:32:34,099 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:34,099 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 21:32:34,113 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:34,115 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:32:34,135 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:34,137 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:32:34,156 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:34,157 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:32:34,177 WARN L141 QuantifierPusher]: treesize reduction 12, result has 7.7 percent of original size [2021-02-21 21:32:34,178 WARN L147 QuantifierPusher]: treesize reduction 12, result has 7.7 percent of original size 1 [2021-02-21 21:32:34,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [864409729] [2021-02-21 21:32:34,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:32:34,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-02-21 21:32:34,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210550704] [2021-02-21 21:32:34,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-21 21:32:34,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:32:34,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-21 21:32:34,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-02-21 21:32:34,180 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 16 states. [2021-02-21 21:32:35,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:32:35,059 INFO L93 Difference]: Finished difference Result 121 states and 133 transitions. [2021-02-21 21:32:35,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-21 21:32:35,060 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2021-02-21 21:32:35,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:32:35,061 INFO L225 Difference]: With dead ends: 121 [2021-02-21 21:32:35,061 INFO L226 Difference]: Without dead ends: 81 [2021-02-21 21:32:35,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2021-02-21 21:32:35,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-02-21 21:32:35,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2021-02-21 21:32:35,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-02-21 21:32:35,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2021-02-21 21:32:35,079 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 43 [2021-02-21 21:32:35,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:32:35,080 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2021-02-21 21:32:35,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-02-21 21:32:35,080 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2021-02-21 21:32:35,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-21 21:32:35,081 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:32:35,081 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:32:35,081 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-21 21:32:35,082 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:32:35,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:32:35,082 INFO L82 PathProgramCache]: Analyzing trace with hash -359597373, now seen corresponding path program 4 times [2021-02-21 21:32:35,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:32:35,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660682980] [2021-02-21 21:32:35,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:32:35,549 WARN L202 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 83 [2021-02-21 21:32:35,555 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:35,558 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 254 [2021-02-21 21:32:35,884 WARN L202 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 83 [2021-02-21 21:32:35,890 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:35,895 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 214 [2021-02-21 21:32:36,198 WARN L202 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 77 [2021-02-21 21:32:36,205 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:36,207 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 214 [2021-02-21 21:32:36,208 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-21 21:32:36,378 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 26 [2021-02-21 21:32:36,379 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:36,382 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-02-21 21:32:36,575 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 26 [2021-02-21 21:32:36,577 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:36,578 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-02-21 21:32:36,733 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 25 [2021-02-21 21:32:36,734 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:36,735 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-02-21 21:32:36,735 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-21 21:32:36,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:32:36,830 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:36,831 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:32:36,831 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:36,832 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:32:36,835 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:36,836 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:32:36,845 WARN L141 QuantifierPusher]: treesize reduction 19, result has 26.9 percent of original size [2021-02-21 21:32:36,846 WARN L147 QuantifierPusher]: treesize reduction 19, result has 26.9 percent of original size 7 [2021-02-21 21:32:36,850 WARN L141 QuantifierPusher]: treesize reduction 32, result has 61.9 percent of original size [2021-02-21 21:32:36,851 WARN L147 QuantifierPusher]: treesize reduction 32, result has 61.9 percent of original size 52 [2021-02-21 21:32:36,884 WARN L141 QuantifierPusher]: treesize reduction 31, result has 56.9 percent of original size [2021-02-21 21:32:36,885 WARN L147 QuantifierPusher]: treesize reduction 31, result has 56.9 percent of original size 41 [2021-02-21 21:32:36,926 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:36,927 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 21:32:36,938 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:36,939 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 21:32:36,950 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:36,950 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:32:36,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:32:36,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:32:36,986 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:36,987 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:32:36,990 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 21:32:36,994 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:36,995 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 259 [2021-02-21 21:32:37,000 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:37,001 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 219 [2021-02-21 21:32:37,003 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:37,004 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 21:32:37,007 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:37,008 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:32:37,020 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:37,022 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:32:37,039 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:37,040 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:32:37,055 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:37,056 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 21:32:37,069 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:37,070 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:32:37,085 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:37,087 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:32:37,104 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:37,105 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:32:37,119 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:37,119 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 21:32:37,135 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:37,136 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:32:37,155 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:37,158 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:32:37,182 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:37,183 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:32:37,203 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:37,204 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 21:32:37,223 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:37,224 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:32:37,246 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:37,247 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:32:37,271 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:37,272 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:32:37,291 WARN L141 QuantifierPusher]: treesize reduction 12, result has 7.7 percent of original size [2021-02-21 21:32:37,292 WARN L147 QuantifierPusher]: treesize reduction 12, result has 7.7 percent of original size 1 [2021-02-21 21:32:37,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [660682980] [2021-02-21 21:32:37,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:32:37,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-02-21 21:32:37,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012290741] [2021-02-21 21:32:37,293 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-21 21:32:37,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:32:37,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-21 21:32:37,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-02-21 21:32:37,295 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 19 states. [2021-02-21 21:32:38,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:32:38,327 INFO L93 Difference]: Finished difference Result 129 states and 141 transitions. [2021-02-21 21:32:38,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-21 21:32:38,328 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 47 [2021-02-21 21:32:38,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:32:38,329 INFO L225 Difference]: With dead ends: 129 [2021-02-21 21:32:38,329 INFO L226 Difference]: Without dead ends: 85 [2021-02-21 21:32:38,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 6 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=140, Invalid=916, Unknown=0, NotChecked=0, Total=1056 [2021-02-21 21:32:38,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-02-21 21:32:38,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 66. [2021-02-21 21:32:38,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-02-21 21:32:38,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2021-02-21 21:32:38,348 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 47 [2021-02-21 21:32:38,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:32:38,349 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2021-02-21 21:32:38,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-02-21 21:32:38,349 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2021-02-21 21:32:38,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-02-21 21:32:38,350 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:32:38,350 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:32:38,350 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-21 21:32:38,350 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:32:38,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:32:38,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1086419200, now seen corresponding path program 5 times [2021-02-21 21:32:38,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:32:38,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1595706298] [2021-02-21 21:32:38,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:32:38,782 WARN L202 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 77 [2021-02-21 21:32:38,786 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:38,788 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 214 [2021-02-21 21:32:39,095 WARN L202 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 83 [2021-02-21 21:32:39,099 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:39,102 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 214 [2021-02-21 21:32:39,417 WARN L202 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 83 [2021-02-21 21:32:39,421 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:39,423 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 254 [2021-02-21 21:32:39,424 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-21 21:32:39,605 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 26 [2021-02-21 21:32:39,606 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:39,608 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-02-21 21:32:39,774 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 26 [2021-02-21 21:32:39,775 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:39,776 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-02-21 21:32:39,929 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 25 [2021-02-21 21:32:39,930 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:39,931 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-02-21 21:32:39,932 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-21 21:32:39,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:32:40,058 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:40,061 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:32:40,064 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:40,065 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:32:40,071 WARN L141 QuantifierPusher]: treesize reduction 32, result has 40.7 percent of original size [2021-02-21 21:32:40,071 WARN L147 QuantifierPusher]: treesize reduction 32, result has 40.7 percent of original size 22 [2021-02-21 21:32:40,092 WARN L141 QuantifierPusher]: treesize reduction 29, result has 43.1 percent of original size [2021-02-21 21:32:40,093 WARN L147 QuantifierPusher]: treesize reduction 29, result has 43.1 percent of original size 22 [2021-02-21 21:32:40,095 WARN L141 QuantifierPusher]: treesize reduction 7, result has 92.4 percent of original size [2021-02-21 21:32:40,097 WARN L147 QuantifierPusher]: treesize reduction 7, result has 92.4 percent of original size 85 [2021-02-21 21:32:40,162 WARN L141 QuantifierPusher]: treesize reduction 24, result has 61.9 percent of original size [2021-02-21 21:32:40,163 WARN L147 QuantifierPusher]: treesize reduction 24, result has 61.9 percent of original size 39 [2021-02-21 21:32:40,206 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:40,207 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 21:32:40,217 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:40,218 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 21:32:40,229 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:40,230 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:32:40,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:32:40,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:32:40,287 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:40,287 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:32:40,293 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 21:32:40,297 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:40,301 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 219 [2021-02-21 21:32:40,306 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:40,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:32:40,309 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:40,312 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 230 [2021-02-21 21:32:40,315 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 231 [2021-02-21 21:32:40,359 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:40,360 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-21 21:32:40,386 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:40,387 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:32:40,402 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:40,404 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-21 21:32:40,421 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:40,422 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:32:40,438 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:40,439 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-21 21:32:40,463 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:40,464 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-21 21:32:40,492 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:40,495 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-21 21:32:40,522 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:40,524 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-21 21:32:40,553 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:40,554 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-21 21:32:40,600 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:40,601 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-21 21:32:40,636 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:40,638 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-21 21:32:40,674 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:40,675 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-21 21:32:40,710 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:40,711 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-21 21:32:40,760 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:40,761 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-21 21:32:40,810 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:40,812 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-21 21:32:40,850 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:40,851 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-21 21:32:40,900 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:40,901 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-21 21:32:40,961 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:40,961 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-21 21:32:41,018 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:41,021 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-21 21:32:41,068 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:41,070 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-21 21:32:41,116 WARN L141 QuantifierPusher]: treesize reduction 12, result has 7.7 percent of original size [2021-02-21 21:32:41,116 WARN L147 QuantifierPusher]: treesize reduction 12, result has 7.7 percent of original size 1 [2021-02-21 21:32:41,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1595706298] [2021-02-21 21:32:41,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:32:41,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-02-21 21:32:41,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746177943] [2021-02-21 21:32:41,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-21 21:32:41,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:32:41,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-21 21:32:41,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=622, Unknown=0, NotChecked=0, Total=812 [2021-02-21 21:32:41,120 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 27 states. [2021-02-21 21:32:42,552 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-02-21 21:32:43,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:32:43,007 INFO L93 Difference]: Finished difference Result 85 states and 92 transitions. [2021-02-21 21:32:43,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-21 21:32:43,008 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 51 [2021-02-21 21:32:43,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:32:43,010 INFO L225 Difference]: With dead ends: 85 [2021-02-21 21:32:43,010 INFO L226 Difference]: Without dead ends: 0 [2021-02-21 21:32:43,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=577, Invalid=2285, Unknown=0, NotChecked=0, Total=2862 [2021-02-21 21:32:43,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-21 21:32:43,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-21 21:32:43,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-21 21:32:43,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-21 21:32:43,018 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 51 [2021-02-21 21:32:43,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:32:43,018 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-21 21:32:43,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-02-21 21:32:43,018 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-21 21:32:43,018 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-21 21:32:43,019 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-21 21:32:43,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-21 21:32:44,293 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 12 [2021-02-21 21:32:44,456 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 10 [2021-02-21 21:32:45,454 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-21 21:32:45,455 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-21 21:32:45,455 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-21 21:32:45,455 INFO L192 CegarLoopUtils]: At program point L3-2(line 3) the Hoare annotation is: true [2021-02-21 21:32:45,455 INFO L192 CegarLoopUtils]: At program point L3-3(line 3) the Hoare annotation is: true [2021-02-21 21:32:45,455 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-21 21:32:45,455 INFO L192 CegarLoopUtils]: At program point L3-4(line 3) the Hoare annotation is: true [2021-02-21 21:32:45,455 INFO L192 CegarLoopUtils]: At program point L-1-1(line -1) the Hoare annotation is: true [2021-02-21 21:32:45,455 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line 3) the Hoare annotation is: true [2021-02-21 21:32:45,455 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 21:32:45,456 INFO L192 CegarLoopUtils]: At program point L3(line 3) the Hoare annotation is: true [2021-02-21 21:32:45,456 INFO L192 CegarLoopUtils]: At program point L3-1(line 3) the Hoare annotation is: true [2021-02-21 21:32:45,456 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-02-21 21:32:45,456 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-02-21 21:32:45,456 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-21 21:32:45,456 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-21 21:32:45,456 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-02-21 21:32:45,456 INFO L192 CegarLoopUtils]: At program point mainEXIT(lines 12 27) the Hoare annotation is: true [2021-02-21 21:32:45,456 INFO L185 CegarLoopUtils]: At program point L23(line 23) the Hoare annotation is: (or (and (< (mod (+ main_~v~0 4294967295) 4294967296) 10) (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 9))) [2021-02-21 21:32:45,456 INFO L185 CegarLoopUtils]: At program point L23-3(line 23) the Hoare annotation is: (and (<= 0 main_~v~0) (<= main_~v~0 9)) [2021-02-21 21:32:45,457 INFO L185 CegarLoopUtils]: At program point L19(line 19) the Hoare annotation is: (= main_~v~0 0) [2021-02-21 21:32:45,457 INFO L185 CegarLoopUtils]: At program point L23-4(line 23) the Hoare annotation is: (and (<= 0 main_~v~0) (= main_~v~0 |main_#t~post11|) (<= main_~v~0 9)) [2021-02-21 21:32:45,457 INFO L185 CegarLoopUtils]: At program point L23-5(line 23) the Hoare annotation is: (and (= main_~v~0 (+ |main_#t~post11| 1)) (<= 0 |main_#t~post11|) (<= |main_#t~post11| 9)) [2021-02-21 21:32:45,457 INFO L185 CegarLoopUtils]: At program point L23-6(line 23) the Hoare annotation is: (or (and (<= 1 main_~v~0) (<= main_~v~0 10)) (and (<= 0 main_~v~0) (<= main_~v~0 9))) [2021-02-21 21:32:45,457 INFO L185 CegarLoopUtils]: At program point L23-7(line 23) the Hoare annotation is: (and (< (mod (+ main_~v~0 4294967295) 4294967296) 10) (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) [2021-02-21 21:32:45,457 INFO L185 CegarLoopUtils]: At program point L19-3(lines 19 25) the Hoare annotation is: (or (and (< (mod (+ main_~v~0 4294967295) 4294967296) 10) (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 9))) [2021-02-21 21:32:45,457 INFO L192 CegarLoopUtils]: At program point L15(line 15) the Hoare annotation is: true [2021-02-21 21:32:45,457 INFO L185 CegarLoopUtils]: At program point L19-4(line 19) the Hoare annotation is: (or (and (< (mod (+ main_~v~0 4294967295) 4294967296) 10) (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 9))) [2021-02-21 21:32:45,458 INFO L185 CegarLoopUtils]: At program point L19-5(line 19) the Hoare annotation is: (or (and (< (mod (+ main_~v~0 4294967295) 4294967296) 10) (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 9))) [2021-02-21 21:32:45,458 INFO L185 CegarLoopUtils]: At program point L19-6(lines 19 25) the Hoare annotation is: (or (and (< (mod (+ main_~v~0 4294967295) 4294967296) 10) (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 9))) [2021-02-21 21:32:45,458 INFO L192 CegarLoopUtils]: At program point L19-7(lines 19 25) the Hoare annotation is: true [2021-02-21 21:32:45,458 INFO L185 CegarLoopUtils]: At program point L24(lines 22 25) the Hoare annotation is: (and (< (mod (+ main_~v~0 4294967295) 4294967296) 10) (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) [2021-02-21 21:32:45,458 INFO L185 CegarLoopUtils]: At program point L20(line 20) the Hoare annotation is: (or (and (< (mod (+ main_~v~0 4294967295) 4294967296) 10) (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 9))) [2021-02-21 21:32:45,458 INFO L185 CegarLoopUtils]: At program point L20-3(lines 20 25) the Hoare annotation is: (or (and (< (mod (+ main_~v~0 4294967295) 4294967296) 10) (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 9))) [2021-02-21 21:32:45,458 INFO L192 CegarLoopUtils]: At program point L16(line 16) the Hoare annotation is: true [2021-02-21 21:32:45,458 INFO L185 CegarLoopUtils]: At program point L20-4(line 20) the Hoare annotation is: (or (and (< (mod (+ main_~v~0 4294967295) 4294967296) 10) (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 9))) [2021-02-21 21:32:45,458 INFO L185 CegarLoopUtils]: At program point L20-5(line 20) the Hoare annotation is: (or (and (< (mod (+ main_~v~0 4294967295) 4294967296) 10) (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 9))) [2021-02-21 21:32:45,459 INFO L185 CegarLoopUtils]: At program point L20-6(lines 20 25) the Hoare annotation is: (or (and (< (mod (+ main_~v~0 4294967295) 4294967296) 10) (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 9))) [2021-02-21 21:32:45,459 INFO L185 CegarLoopUtils]: At program point L21(line 21) the Hoare annotation is: (or (and (< (mod (+ main_~v~0 4294967295) 4294967296) 10) (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 9))) [2021-02-21 21:32:45,459 INFO L185 CegarLoopUtils]: At program point L21-3(lines 21 25) the Hoare annotation is: (or (and (< (mod (+ main_~v~0 4294967295) 4294967296) 10) (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 9))) [2021-02-21 21:32:45,459 INFO L192 CegarLoopUtils]: At program point L17(line 17) the Hoare annotation is: true [2021-02-21 21:32:45,459 INFO L185 CegarLoopUtils]: At program point L21-4(line 21) the Hoare annotation is: (or (and (< (mod (+ main_~v~0 4294967295) 4294967296) 10) (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 9))) [2021-02-21 21:32:45,459 INFO L185 CegarLoopUtils]: At program point L21-5(line 21) the Hoare annotation is: (or (and (< (mod (+ main_~v~0 4294967295) 4294967296) 10) (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 9))) [2021-02-21 21:32:45,459 INFO L185 CegarLoopUtils]: At program point L21-6(lines 21 25) the Hoare annotation is: (or (and (< (mod (+ main_~v~0 4294967295) 4294967296) 10) (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 9))) [2021-02-21 21:32:45,460 INFO L192 CegarLoopUtils]: At program point mainFINAL(lines 12 27) the Hoare annotation is: true [2021-02-21 21:32:45,460 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 12 27) the Hoare annotation is: true [2021-02-21 21:32:45,460 INFO L185 CegarLoopUtils]: At program point L22(line 22) the Hoare annotation is: (or (and (< (mod (+ main_~v~0 4294967295) 4294967296) 10) (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 9))) [2021-02-21 21:32:45,460 INFO L185 CegarLoopUtils]: At program point L22-3(line 22) the Hoare annotation is: (and (< (mod (+ main_~v~0 4294967295) 4294967296) 10) (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) [2021-02-21 21:32:45,460 INFO L192 CegarLoopUtils]: At program point L18(line 18) the Hoare annotation is: true [2021-02-21 21:32:45,460 INFO L185 CegarLoopUtils]: At program point L22-4(line 22) the Hoare annotation is: (and (< (mod (+ main_~v~0 4294967295) 4294967296) 10) (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) [2021-02-21 21:32:45,460 INFO L185 CegarLoopUtils]: At program point L22-5(lines 22 25) the Hoare annotation is: (or (and (< (mod (+ main_~v~0 4294967295) 4294967296) 10) (<= 10 main_~v~0) (<= (div main_~v~0 4) 2)) (and (<= 0 main_~v~0) (<= main_~v~0 9))) [2021-02-21 21:32:45,461 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2021-02-21 21:32:45,461 INFO L185 CegarLoopUtils]: At program point __VERIFIER_assertEXIT(lines 5 10) the Hoare annotation is: (or (<= (+ __VERIFIER_assert_~cond 2) 0) (and (not (<= 2 |__VERIFIER_assert_#in~cond|)) (not (<= (+ |__VERIFIER_assert_#in~cond| 2) 0))) (<= 2 __VERIFIER_assert_~cond)) [2021-02-21 21:32:45,461 INFO L185 CegarLoopUtils]: At program point L7(line 7) the Hoare annotation is: (and (not (<= 2 |__VERIFIER_assert_#in~cond|)) (not (<= (+ |__VERIFIER_assert_#in~cond| 2) 0))) [2021-02-21 21:32:45,461 INFO L185 CegarLoopUtils]: At program point L6(lines 6 8) the Hoare annotation is: (or (<= (+ __VERIFIER_assert_~cond 2) 0) (and (not (<= 2 |__VERIFIER_assert_#in~cond|)) (not (<= (+ |__VERIFIER_assert_#in~cond| 2) 0))) (<= 2 __VERIFIER_assert_~cond)) [2021-02-21 21:32:45,461 INFO L185 CegarLoopUtils]: At program point L7-1(line 7) the Hoare annotation is: (and (not (<= 2 |__VERIFIER_assert_#in~cond|)) (not (<= (+ |__VERIFIER_assert_#in~cond| 2) 0))) [2021-02-21 21:32:45,461 INFO L185 CegarLoopUtils]: At program point L6-2(lines 5 10) the Hoare annotation is: (or (<= (+ __VERIFIER_assert_~cond 2) 0) (and (not (<= 2 |__VERIFIER_assert_#in~cond|)) (not (<= (+ |__VERIFIER_assert_#in~cond| 2) 0))) (<= 2 __VERIFIER_assert_~cond)) [2021-02-21 21:32:45,462 INFO L185 CegarLoopUtils]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) the Hoare annotation is: (and (not (<= 2 |__VERIFIER_assert_#in~cond|)) (not (<= (+ |__VERIFIER_assert_#in~cond| 2) 0))) [2021-02-21 21:32:45,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 09:32:45 BoogieIcfgContainer [2021-02-21 21:32:45,482 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 21:32:45,484 INFO L168 Benchmark]: Toolchain (without parser) took 20423.79 ms. Allocated memory was 151.0 MB in the beginning and 262.1 MB in the end (delta: 111.1 MB). Free memory was 133.5 MB in the beginning and 137.9 MB in the end (delta: -4.4 MB). Peak memory consumption was 158.9 MB. Max. memory is 8.0 GB. [2021-02-21 21:32:45,484 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 151.0 MB. Free memory was 124.1 MB in the beginning and 124.0 MB in the end (delta: 91.9 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 21:32:45,484 INFO L168 Benchmark]: CACSL2BoogieTranslator took 302.61 ms. Allocated memory is still 151.0 MB. Free memory was 132.4 MB in the beginning and 123.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-21 21:32:45,485 INFO L168 Benchmark]: Boogie Preprocessor took 39.88 ms. Allocated memory is still 151.0 MB. Free memory was 123.0 MB in the beginning and 121.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-21 21:32:45,485 INFO L168 Benchmark]: RCFGBuilder took 498.26 ms. Allocated memory is still 151.0 MB. Free memory was 121.5 MB in the beginning and 119.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2021-02-21 21:32:45,485 INFO L168 Benchmark]: TraceAbstraction took 19555.78 ms. Allocated memory was 151.0 MB in the beginning and 262.1 MB in the end (delta: 111.1 MB). Free memory was 119.1 MB in the beginning and 137.9 MB in the end (delta: -18.8 MB). Peak memory consumption was 145.0 MB. Max. memory is 8.0 GB. [2021-02-21 21:32:45,487 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 151.0 MB. Free memory was 124.1 MB in the beginning and 124.0 MB in the end (delta: 91.9 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 302.61 ms. Allocated memory is still 151.0 MB. Free memory was 132.4 MB in the beginning and 123.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 39.88 ms. Allocated memory is still 151.0 MB. Free memory was 123.0 MB in the beginning and 121.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 498.26 ms. Allocated memory is still 151.0 MB. Free memory was 121.5 MB in the beginning and 119.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 19555.78 ms. Allocated memory was 151.0 MB in the beginning and 262.1 MB in the end (delta: 111.1 MB). Free memory was 119.1 MB in the beginning and 137.9 MB in the end (delta: -18.8 MB). Peak memory consumption was 145.0 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: 23]: Loop Invariant Derived loop invariant: (1 <= v && v <= 10) || (0 <= v && v <= 9) - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: (((v + 4294967295) % 4294967296 < 10 && 10 <= v) && v / 4 <= 2) || (0 <= v && v <= 9) - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: (((v + 4294967295) % 4294967296 < 10 && 10 <= v) && v / 4 <= 2) || (0 <= v && v <= 9) - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: (((v + 4294967295) % 4294967296 < 10 && 10 <= v) && v / 4 <= 2) || (0 <= v && v <= 9) - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: (((v + 4294967295) % 4294967296 < 10 && 10 <= v) && v / 4 <= 2) || (0 <= v && v <= 9) - ProcedureContractResult [Line: 12]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 5]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: (cond + 2 <= 0 || (!(2 <= \old(cond)) && !(\old(cond) + 2 <= 0))) || 2 <= cond - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 58 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 16.9s, OverallIterations: 7, TraceHistogramMax: 5, AutomataDifference: 5.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 381 SDtfs, 783 SDslu, 537 SDs, 0 SdLazy, 2346 SolverSat, 62 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 202 GetRequests, 38 SyntacticMatches, 19 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1124 ImplicationChecksByTransitivity, 4.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=66occurred 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, 95 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 55 LocationsWithAnnotation, 97 PreInvPairs, 165 NumberOfFragments, 665 HoareAnnotationTreeSize, 97 FomulaSimplifications, 81180 FormulaSimplificationTreeSizeReduction, 0.6s HoareSimplificationTime, 55 FomulaSimplificationsInter, 2630 FormulaSimplificationTreeSizeReductionInter, 1.8s 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...