/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/loopv3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 11:53:48,958 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 11:53:48,959 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 11:53:48,977 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 11:53:48,984 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 11:53:48,984 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 11:53:48,985 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 11:53:48,985 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 11:53:48,986 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 11:53:48,986 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 11:53:48,987 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 11:53:48,989 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 11:53:48,990 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 11:53:48,990 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 11:53:48,991 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 11:53:48,992 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 11:53:48,993 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 11:53:49,009 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 11:53:49,009 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 11:53:49,010 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 11:53:49,011 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-06 11:53:49,018 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 11:53:49,018 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 11:53:49,019 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 11:53:49,019 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 11:53:49,020 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 11:53:49,020 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 11:53:49,024 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 11:53:49,025 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 11:53:49,025 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 11:53:49,025 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 11:53:49,025 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 11:53:49,026 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 11:53:49,026 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 11:53:49,026 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 11:53:49,026 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 11:53:49,026 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 11:53:49,026 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 11:53:49,026 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 11:53:49,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 11:53:49,027 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 11:53:49,027 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-06 11:53:49,027 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 11:53:49,027 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-06 11:53:49,027 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 11:53:49,294 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 11:53:49,314 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 11:53:49,316 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 11:53:49,316 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 11:53:49,317 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 11:53:49,318 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/loopv3.c [2021-05-06 11:53:49,365 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9dd625d5b/c23dd03d5080494a9630635e2098cc8a/FLAG28c790d99 [2021-05-06 11:53:49,738 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 11:53:49,739 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/loopv3.c [2021-05-06 11:53:49,743 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9dd625d5b/c23dd03d5080494a9630635e2098cc8a/FLAG28c790d99 [2021-05-06 11:53:49,758 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9dd625d5b/c23dd03d5080494a9630635e2098cc8a [2021-05-06 11:53:49,760 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 11:53:49,762 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 11:53:49,765 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 11:53:49,765 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 11:53:49,768 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 11:53:49,769 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 11:53:49" (1/1) ... [2021-05-06 11:53:49,769 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1019f6f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:53:49, skipping insertion in model container [2021-05-06 11:53:49,769 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 11:53:49" (1/1) ... [2021-05-06 11:53:49,774 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 11:53:49,784 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 11:53:49,899 WARN L224 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/loopv3.c[456,469] [2021-05-06 11:53:49,908 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 11:53:49,913 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 11:53:49,922 WARN L224 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/loopv3.c[456,469] [2021-05-06 11:53:49,924 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 11:53:49,949 INFO L208 MainTranslator]: Completed translation [2021-05-06 11:53:49,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:53:49 WrapperNode [2021-05-06 11:53:49,949 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 11:53:49,950 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 11:53:49,950 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 11:53:49,950 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 11:53:49,956 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:53:49" (1/1) ... [2021-05-06 11:53:49,957 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:53:49" (1/1) ... [2021-05-06 11:53:49,975 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:53:49" (1/1) ... [2021-05-06 11:53:49,976 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:53:49" (1/1) ... [2021-05-06 11:53:49,979 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:53:49" (1/1) ... [2021-05-06 11:53:49,982 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:53:49" (1/1) ... [2021-05-06 11:53:49,982 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:53:49" (1/1) ... [2021-05-06 11:53:49,983 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 11:53:49,984 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 11:53:49,984 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 11:53:49,984 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 11:53:49,985 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:53:49" (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 [2021-05-06 11:53:50,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 11:53:50,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 11:53:50,055 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 11:53:50,055 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 11:53:50,056 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 11:53:50,056 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 11:53:50,056 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 11:53:50,056 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 11:53:50,056 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 11:53:50,056 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 11:53:50,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 11:53:50,056 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 11:53:50,057 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 11:53:50,057 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 11:53:50,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 11:53:50,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 11:53:50,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 11:53:50,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 11:53:50,058 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 11:53:50,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 11:53:50,271 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 11:53:50,272 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 11:53:50,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 11:53:50 BoogieIcfgContainer [2021-05-06 11:53:50,273 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 11:53:50,274 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 11:53:50,274 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 11:53:50,276 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 11:53:50,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 11:53:49" (1/3) ... [2021-05-06 11:53:50,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@db2f14a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 11:53:50, skipping insertion in model container [2021-05-06 11:53:50,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:53:49" (2/3) ... [2021-05-06 11:53:50,277 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@db2f14a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 11:53:50, skipping insertion in model container [2021-05-06 11:53:50,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 11:53:50" (3/3) ... [2021-05-06 11:53:50,277 INFO L111 eAbstractionObserver]: Analyzing ICFG loopv3.c [2021-05-06 11:53:50,281 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-06 11:53:50,284 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 11:53:50,316 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 11:53:50,336 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 11:53:50,336 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 11:53:50,336 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-06 11:53:50,336 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 11:53:50,336 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 11:53:50,336 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 11:53:50,336 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 11:53:50,336 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 11:53:50,349 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:53:50,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 11:53:50,353 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:53:50,354 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:53:50,354 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:53:50,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:53:50,358 INFO L82 PathProgramCache]: Analyzing trace with hash -380103047, now seen corresponding path program 1 times [2021-05-06 11:53:50,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:53:50,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358472449] [2021-05-06 11:53:50,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:53:50,412 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:53:50,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:53:50,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:53:50,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:53:50,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:53:50,638 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:53:50,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358472449] [2021-05-06 11:53:50,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1358472449] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:53:50,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:53:50,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 11:53:50,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085541276] [2021-05-06 11:53:50,643 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 11:53:50,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:53:50,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 11:53:50,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 11:53:50,654 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:53:50,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:53:50,811 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2021-05-06 11:53:50,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 11:53:50,812 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 11:53:50,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:53:50,817 INFO L225 Difference]: With dead ends: 36 [2021-05-06 11:53:50,817 INFO L226 Difference]: Without dead ends: 16 [2021-05-06 11:53:50,819 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 126.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-06 11:53:50,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-05-06 11:53:50,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2021-05-06 11:53:50,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:53:50,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-05-06 11:53:50,852 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2021-05-06 11:53:50,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:53:50,852 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-05-06 11:53:50,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:53:50,853 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-05-06 11:53:50,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-06 11:53:50,854 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:53:50,854 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:53:50,854 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 11:53:50,854 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:53:50,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:53:50,855 INFO L82 PathProgramCache]: Analyzing trace with hash 437044508, now seen corresponding path program 1 times [2021-05-06 11:53:50,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:53:50,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1043099894] [2021-05-06 11:53:50,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:53:50,910 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 91.3 percent of original size [2021-05-06 11:53:50,945 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:53:50,947 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:53:50,964 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-06 11:53:50,978 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-06 11:53:50,995 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 91.3 percent of original size 84 [2021-05-06 11:53:51,049 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:53:51,057 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-06 11:53:51,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:53:51,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:53:51,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:53:51,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:53:51,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:53:51,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:53:51,421 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:53:51,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1043099894] [2021-05-06 11:53:51,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1043099894] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:53:51,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:53:51,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-06 11:53:51,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495372318] [2021-05-06 11:53:51,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 11:53:51,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:53:51,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 11:53:51,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-05-06 11:53:51,424 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 11 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:53:51,584 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2021-05-06 11:53:51,768 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-05-06 11:53:52,075 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-05-06 11:53:52,404 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2021-05-06 11:53:52,580 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2021-05-06 11:53:52,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:53:52,948 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2021-05-06 11:53:52,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 11:53:52,953 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-06 11:53:52,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:53:52,954 INFO L225 Difference]: With dead ends: 24 [2021-05-06 11:53:52,954 INFO L226 Difference]: Without dead ends: 18 [2021-05-06 11:53:52,956 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1270.0ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-05-06 11:53:52,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-06 11:53:52,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2021-05-06 11:53:52,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:53:52,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-05-06 11:53:52,986 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 14 [2021-05-06 11:53:52,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:53:52,987 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-05-06 11:53:52,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:53:52,989 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-05-06 11:53:52,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-06 11:53:52,989 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:53:52,989 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:53:52,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 11:53:52,989 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:53:52,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:53:52,990 INFO L82 PathProgramCache]: Analyzing trace with hash -2082915426, now seen corresponding path program 1 times [2021-05-06 11:53:52,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:53:52,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1999559366] [2021-05-06 11:53:52,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:53:53,020 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 90.8 percent of original size [2021-05-06 11:53:53,039 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:53:53,040 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:53:53,044 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-05-06 11:53:53,051 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-06 11:53:53,062 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 90.8 percent of original size 59 [2021-05-06 11:53:53,077 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:53:53,079 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-06 11:53:53,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:53:53,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:53:53,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:53:53,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:53:53,367 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:53:53,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1999559366] [2021-05-06 11:53:53,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1999559366] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:53:53,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:53:53,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-06 11:53:53,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402557104] [2021-05-06 11:53:53,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 11:53:53,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:53:53,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 11:53:53,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 11:53:53,369 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 11 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:53:53,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:53:53,921 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2021-05-06 11:53:53,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 11:53:53,921 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-06 11:53:53,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:53:53,922 INFO L225 Difference]: With dead ends: 26 [2021-05-06 11:53:53,922 INFO L226 Difference]: Without dead ends: 20 [2021-05-06 11:53:53,923 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 642.5ms TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-05-06 11:53:53,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-06 11:53:53,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-05-06 11:53:53,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:53:53,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-05-06 11:53:53,927 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 14 [2021-05-06 11:53:53,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:53:53,927 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-05-06 11:53:53,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:53:53,928 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-05-06 11:53:53,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-06 11:53:53,928 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:53:53,928 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:53:53,928 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 11:53:53,928 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:53:53,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:53:53,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1511837057, now seen corresponding path program 1 times [2021-05-06 11:53:53,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:53:53,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [961788186] [2021-05-06 11:53:53,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:53:53,940 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 91.3 percent of original size [2021-05-06 11:53:53,943 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:53:53,944 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:53:53,951 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-06 11:53:53,956 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-06 11:53:54,000 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 91.3 percent of original size 84 [2021-05-06 11:53:54,019 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:53:54,030 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 90.8 percent of original size [2021-05-06 11:53:54,048 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:53:54,049 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:53:54,067 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-05-06 11:53:54,072 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-06 11:53:54,087 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 90.8 percent of original size 59 [2021-05-06 11:53:54,112 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:53:54,120 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 11:53:54,120 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:53:54,121 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-06 11:53:54,123 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 11:53:54,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:53:54,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:53:54,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:53:54,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:53:54,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:53:54,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:53:58,460 WARN L205 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2021-05-06 11:54:00,522 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 63 [2021-05-06 11:54:00,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:54:00,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:54:02,781 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:54:02,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [961788186] [2021-05-06 11:54:02,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [961788186] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:54:02,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:54:02,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-06 11:54:02,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199056783] [2021-05-06 11:54:02,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 11:54:02,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:54:02,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 11:54:02,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=164, Unknown=1, NotChecked=0, Total=210 [2021-05-06 11:54:02,783 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 13 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:54:04,960 WARN L205 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 101 [2021-05-06 11:54:11,419 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2021-05-06 11:54:23,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:54:23,892 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2021-05-06 11:54:23,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 11:54:23,893 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-05-06 11:54:23,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:54:23,893 INFO L225 Difference]: With dead ends: 32 [2021-05-06 11:54:23,893 INFO L226 Difference]: Without dead ends: 24 [2021-05-06 11:54:23,894 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 15126.4ms TimeCoverageRelationStatistics Valid=146, Invalid=551, Unknown=5, NotChecked=0, Total=702 [2021-05-06 11:54:23,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-06 11:54:23,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2021-05-06 11:54:23,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:54:23,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2021-05-06 11:54:23,898 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 16 [2021-05-06 11:54:23,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:54:23,899 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2021-05-06 11:54:23,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:54:23,899 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2021-05-06 11:54:23,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-06 11:54:23,899 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:54:23,899 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:54:23,899 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-06 11:54:23,899 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:54:23,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:54:23,900 INFO L82 PathProgramCache]: Analyzing trace with hash 416888065, now seen corresponding path program 2 times [2021-05-06 11:54:23,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:54:23,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384868916] [2021-05-06 11:54:23,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:54:23,908 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 91.3 percent of original size [2021-05-06 11:54:23,909 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:54:23,910 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:54:23,915 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-06 11:54:23,920 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-06 11:54:23,948 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 91.3 percent of original size 84 [2021-05-06 11:54:23,972 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:54:23,978 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 90.8 percent of original size [2021-05-06 11:54:23,997 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:54:23,997 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:54:24,003 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-05-06 11:54:24,008 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-06 11:54:24,020 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 90.8 percent of original size 59 [2021-05-06 11:54:24,037 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:54:24,038 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 11:54:24,038 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:54:24,039 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-06 11:54:24,039 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 11:54:24,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:54:24,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:54:24,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:54:24,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:54:24,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:54:24,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:54:28,270 WARN L205 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2021-05-06 11:54:30,332 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 63 [2021-05-06 11:54:30,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:54:30,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:54:30,542 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:54:30,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384868916] [2021-05-06 11:54:30,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1384868916] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:54:30,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:54:30,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-06 11:54:30,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597487020] [2021-05-06 11:54:30,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 11:54:30,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:54:30,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 11:54:30,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-06 11:54:30,544 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 13 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:54:32,653 WARN L205 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 101 [2021-05-06 11:54:37,236 WARN L205 SmtUtils]: Spent 2.26 s on a formula simplification that was a NOOP. DAG size: 95 [2021-05-06 11:54:37,371 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-05-06 11:54:37,953 WARN L205 SmtUtils]: Spent 552.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2021-05-06 11:54:38,346 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-05-06 11:54:44,635 WARN L205 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 99 DAG size of output: 92 [2021-05-06 11:54:48,797 WARN L205 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 105 DAG size of output: 98 [2021-05-06 11:54:48,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:54:48,992 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2021-05-06 11:54:48,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-06 11:54:48,993 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-05-06 11:54:48,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:54:48,993 INFO L225 Difference]: With dead ends: 40 [2021-05-06 11:54:48,993 INFO L226 Difference]: Without dead ends: 30 [2021-05-06 11:54:48,994 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 16467.0ms TimeCoverageRelationStatistics Valid=201, Invalid=791, Unknown=0, NotChecked=0, Total=992 [2021-05-06 11:54:48,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-06 11:54:48,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 20. [2021-05-06 11:54:48,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:54:48,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-05-06 11:54:48,998 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 16 [2021-05-06 11:54:48,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:54:48,999 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-05-06 11:54:48,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:54:48,999 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-05-06 11:54:48,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 11:54:48,999 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:54:48,999 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:54:48,999 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-06 11:54:48,999 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:54:49,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:54:49,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1820318244, now seen corresponding path program 3 times [2021-05-06 11:54:49,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:54:49,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [13142332] [2021-05-06 11:54:49,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:54:49,010 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 91.3 percent of original size [2021-05-06 11:54:49,012 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:54:49,012 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:54:49,017 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-06 11:54:49,022 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-06 11:54:49,050 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 91.3 percent of original size 84 [2021-05-06 11:54:49,071 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:54:49,089 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 90.8 percent of original size [2021-05-06 11:54:49,103 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:54:49,103 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:54:49,108 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-05-06 11:54:49,114 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-06 11:54:49,125 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 90.8 percent of original size 59 [2021-05-06 11:54:49,142 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:54:49,144 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 11:54:49,144 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:54:49,144 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-06 11:54:49,145 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:54:49,145 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-06 11:54:49,151 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 11:54:49,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:54:49,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:54:49,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:54:49,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:54:49,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:54:49,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:54:49,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:54:51,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:54:51,804 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:54:51,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [13142332] [2021-05-06 11:54:51,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [13142332] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:54:51,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:54:51,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-05-06 11:54:51,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750971385] [2021-05-06 11:54:51,805 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 11:54:51,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:54:51,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 11:54:51,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=238, Unknown=1, NotChecked=0, Total=306 [2021-05-06 11:54:51,806 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 15 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:54:53,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:54:53,272 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2021-05-06 11:54:53,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-06 11:54:53,272 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-05-06 11:54:53,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:54:53,273 INFO L225 Difference]: With dead ends: 40 [2021-05-06 11:54:53,273 INFO L226 Difference]: Without dead ends: 20 [2021-05-06 11:54:53,273 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 3477.4ms TimeCoverageRelationStatistics Valid=241, Invalid=948, Unknown=1, NotChecked=0, Total=1190 [2021-05-06 11:54:53,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-06 11:54:53,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-05-06 11:54:53,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:54:53,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-05-06 11:54:53,278 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 18 [2021-05-06 11:54:53,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:54:53,278 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-05-06 11:54:53,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:54:53,279 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-05-06 11:54:53,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 11:54:53,279 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:54:53,279 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:54:53,279 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-06 11:54:53,279 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:54:53,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:54:53,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1773584474, now seen corresponding path program 4 times [2021-05-06 11:54:53,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:54:53,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1203492441] [2021-05-06 11:54:53,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:54:53,288 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 91.3 percent of original size [2021-05-06 11:54:53,290 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:54:53,290 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:54:53,295 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-06 11:54:53,302 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-06 11:54:53,343 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 91.3 percent of original size 84 [2021-05-06 11:54:53,367 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:54:53,377 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 90.8 percent of original size [2021-05-06 11:54:53,378 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:54:53,383 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:54:53,388 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-05-06 11:54:53,394 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-06 11:54:53,417 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 90.8 percent of original size 59 [2021-05-06 11:54:53,434 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:54:53,435 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 11:54:53,436 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:54:53,436 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-06 11:54:53,436 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 11:54:53,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:54:53,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:54:53,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:54:53,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:54:53,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:54:53,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:54:54,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:54:54,183 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:54:54,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1203492441] [2021-05-06 11:54:54,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1203492441] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:54:54,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:54:54,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-05-06 11:54:54,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512049648] [2021-05-06 11:54:54,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 11:54:54,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:54:54,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 11:54:54,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-05-06 11:54:54,185 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 15 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:54:54,360 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-05-06 11:54:54,494 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2021-05-06 11:54:55,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:54:55,569 INFO L93 Difference]: Finished difference Result 30 states and 37 transitions. [2021-05-06 11:54:55,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-06 11:54:55,569 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-05-06 11:54:55,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:54:55,570 INFO L225 Difference]: With dead ends: 30 [2021-05-06 11:54:55,570 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 11:54:55,570 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1672.9ms TimeCoverageRelationStatistics Valid=214, Invalid=842, Unknown=0, NotChecked=0, Total=1056 [2021-05-06 11:54:55,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 11:54:55,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 11:54:55,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 11:54:55,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 11:54:55,571 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2021-05-06 11:54:55,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:54:55,571 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 11:54:55,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:54:55,571 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 11:54:55,571 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 11:54:55,571 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-06 11:54:55,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-06 11:54:56,114 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 49 [2021-05-06 11:54:56,575 WARN L205 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 51 [2021-05-06 11:54:56,845 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 7) no Hoare annotation was computed. [2021-05-06 11:54:56,845 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 7) no Hoare annotation was computed. [2021-05-06 11:54:56,845 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 7) no Hoare annotation was computed. [2021-05-06 11:54:56,845 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: (and (<= ~SIZE~0 50000001) (<= 50000001 ~SIZE~0)) [2021-05-06 11:54:56,845 INFO L194 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)|) (= ~SIZE~0 |old(~SIZE~0)|) (= |#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|)) [2021-05-06 11:54:56,846 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: (and (<= ~SIZE~0 50000001) (<= 50000001 ~SIZE~0)) [2021-05-06 11:54:56,846 INFO L194 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: (<= 50000001 ~SIZE~0) [2021-05-06 11:54:56,846 INFO L194 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: (and (<= ~SIZE~0 50000001) (<= 50000001 ~SIZE~0)) [2021-05-06 11:54:56,846 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-06 11:54:56,846 INFO L194 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: (<= 50000001 ~SIZE~0) [2021-05-06 11:54:56,846 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 9 11) no Hoare annotation was computed. [2021-05-06 11:54:56,846 INFO L198 CegarLoopUtils]: For program point L10(line 10) no Hoare annotation was computed. [2021-05-06 11:54:56,846 INFO L198 CegarLoopUtils]: For program point L10-2(lines 9 11) no Hoare annotation was computed. [2021-05-06 11:54:56,846 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 9 11) no Hoare annotation was computed. [2021-05-06 11:54:56,846 INFO L194 CegarLoopUtils]: At program point L32(line 32) the Hoare annotation is: (or (not (<= 50000001 ~SIZE~0)) (let ((.cse0 (* 4 main_~j~0))) (and (< main_~i~0 (+ ~SIZE~0 8)) (<= 50000001 main_~i~0) (<= main_~i~0 .cse0) (< .cse0 (+ main_~i~0 1)))) (not (<= ~SIZE~0 50000001))) [2021-05-06 11:54:56,846 INFO L201 CegarLoopUtils]: At program point L32-1(line 32) the Hoare annotation is: true [2021-05-06 11:54:56,846 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 20 34) the Hoare annotation is: true [2021-05-06 11:54:56,846 INFO L194 CegarLoopUtils]: At program point L25(lines 25 28) the Hoare annotation is: (let ((.cse4 (* main_~i~0 (- 1))) (.cse3 (* main_~i~0 7)) (.cse0 (<= 0 (+ |main_#t~nondet7| 2147483648))) (.cse1 (< main_~i~0 ~SIZE~0)) (.cse2 (<= |main_#t~nondet7| 2147483647))) (or (not (<= 50000001 ~SIZE~0)) (and .cse0 .cse1 .cse2 (or (= main_~i~0 4) (and (= (mod (+ .cse3 4) (- 8)) 0) (< 0 (div (+ .cse4 4) (- 8)))))) (let ((.cse5 (* 4 main_~j~0))) (and (= main_~i~0 0) .cse0 .cse2 (<= main_~i~0 .cse5) (< .cse5 (+ main_~i~0 1)))) (and (or (= main_~i~0 8) (and (< 0 (div (+ .cse4 8) (- 8))) (= (mod .cse3 (- 8)) 0))) .cse0 .cse1 .cse2) (not (<= ~SIZE~0 50000001)))) [2021-05-06 11:54:56,846 INFO L201 CegarLoopUtils]: At program point mainEXIT(lines 20 34) the Hoare annotation is: true [2021-05-06 11:54:56,847 INFO L194 CegarLoopUtils]: At program point L25-2(lines 23 30) the Hoare annotation is: (let ((.cse2 (* main_~i~0 (- 1))) (.cse3 (* main_~i~0 7)) (.cse1 (< main_~i~0 (+ ~SIZE~0 8)))) (or (let ((.cse0 (* 4 main_~j~0))) (and (= main_~i~0 0) (<= main_~i~0 .cse0) (< .cse0 (+ main_~i~0 1)))) (= main_~i~0 12) (= main_~i~0 4) (and .cse1 (or (= main_~i~0 20) (and (< 0 (div (+ .cse2 20) (- 8))) (= (mod (+ .cse3 4) (- 8)) 0)))) (not (<= 50000001 ~SIZE~0)) (and (or (= main_~i~0 8) (and (< 0 (div (+ .cse2 8) (- 8))) (= (mod .cse3 (- 8)) 0))) .cse1) (not (<= ~SIZE~0 50000001)))) [2021-05-06 11:54:56,847 INFO L194 CegarLoopUtils]: At program point L23-2(lines 23 30) the Hoare annotation is: (let ((.cse1 (< main_~i~0 (+ ~SIZE~0 8))) (.cse2 (<= 50000001 main_~i~0)) (.cse0 (* main_~i~0 7))) (or (and (= (mod (+ .cse0 4) (- 8)) 0) .cse1 .cse2) (not (<= 50000001 ~SIZE~0)) (and .cse1 .cse2 (= (mod .cse0 (- 8)) 0)) (not (<= ~SIZE~0 50000001)))) [2021-05-06 11:54:56,847 INFO L201 CegarLoopUtils]: At program point mainFINAL(lines 20 34) the Hoare annotation is: true [2021-05-06 11:54:56,847 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 12 17) the Hoare annotation is: true [2021-05-06 11:54:56,847 INFO L194 CegarLoopUtils]: At program point L14(line 14) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (<= 50000001 ~SIZE~0))) [2021-05-06 11:54:56,847 INFO L194 CegarLoopUtils]: At program point L13(lines 13 15) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (<= 50000001 ~SIZE~0)) (not (= __VERIFIER_assert_~cond 0))) [2021-05-06 11:54:56,847 INFO L201 CegarLoopUtils]: At program point L13-2(lines 12 17) the Hoare annotation is: true [2021-05-06 11:54:56,847 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertEXIT(lines 12 17) the Hoare annotation is: true [2021-05-06 11:54:56,847 INFO L194 CegarLoopUtils]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (<= 50000001 ~SIZE~0))) [2021-05-06 11:54:56,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 11:54:56 BoogieIcfgContainer [2021-05-06 11:54:56,858 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 11:54:56,858 INFO L168 Benchmark]: Toolchain (without parser) took 67096.75 ms. Allocated memory was 206.6 MB in the beginning and 257.9 MB in the end (delta: 51.4 MB). Free memory was 172.1 MB in the beginning and 134.4 MB in the end (delta: 37.7 MB). Peak memory consumption was 133.1 MB. Max. memory is 8.0 GB. [2021-05-06 11:54:56,858 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 206.6 MB. Free memory is still 188.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 11:54:56,858 INFO L168 Benchmark]: CACSL2BoogieTranslator took 184.59 ms. Allocated memory is still 206.6 MB. Free memory was 172.0 MB in the beginning and 190.9 MB in the end (delta: -18.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 8.0 GB. [2021-05-06 11:54:56,859 INFO L168 Benchmark]: Boogie Preprocessor took 33.39 ms. Allocated memory is still 206.6 MB. Free memory was 190.9 MB in the beginning and 189.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 11:54:56,859 INFO L168 Benchmark]: RCFGBuilder took 288.81 ms. Allocated memory is still 206.6 MB. Free memory was 189.6 MB in the beginning and 175.5 MB in the end (delta: 14.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-06 11:54:56,859 INFO L168 Benchmark]: TraceAbstraction took 66584.10 ms. Allocated memory was 206.6 MB in the beginning and 257.9 MB in the end (delta: 51.4 MB). Free memory was 174.9 MB in the beginning and 134.4 MB in the end (delta: 40.5 MB). Peak memory consumption was 135.9 MB. Max. memory is 8.0 GB. [2021-05-06 11:54:56,859 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 206.6 MB. Free memory is still 188.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 184.59 ms. Allocated memory is still 206.6 MB. Free memory was 172.0 MB in the beginning and 190.9 MB in the end (delta: -18.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 33.39 ms. Allocated memory is still 206.6 MB. Free memory was 190.9 MB in the beginning and 189.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 288.81 ms. Allocated memory is still 206.6 MB. Free memory was 189.6 MB in the beginning and 175.5 MB in the end (delta: 14.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 66584.10 ms. Allocated memory was 206.6 MB in the beginning and 257.9 MB in the end (delta: 51.4 MB). Free memory was 174.9 MB in the beginning and 134.4 MB in the end (delta: 40.5 MB). Peak memory consumption was 135.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 65237.9ms, OverallIterations: 7, TraceHistogramMax: 3, EmptinessCheckTime: 10.5ms, AutomataDifference: 44677.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 1272.9ms, InitialAbstractionConstructionTime: 8.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 67 SDtfs, 256 SDslu, 166 SDs, 0 SdLazy, 829 SolverSat, 117 SolverUnsat, 7 SolverUnknown, 0 SolverNotchecked, 15782.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 187 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 38783.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=4, InterpolantAutomatonStates: 109, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 71.3ms AutomataMinimizationTime, 7 MinimizatonAttempts, 15 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 21 LocationsWithAnnotation, 99 PreInvPairs, 165 NumberOfFragments, 358 HoareAnnotationTreeSize, 99 FomulaSimplifications, 6729 FormulaSimplificationTreeSizeReduction, 194.3ms HoareSimplificationTime, 21 FomulaSimplificationsInter, 2524 FormulaSimplificationTreeSizeReductionInter, 1063.6ms 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: (((((((i == 0 && i <= 4 * j) && 4 * j < i + 1) || i == 12) || i == 4) || (i < SIZE + 8 && (i == 20 || (0 < (i * -1 + 20) / -8 && (i * 7 + 4) % -8 == 0)))) || !(50000001 <= SIZE)) || ((i == 8 || (0 < (i * -1 + 8) / -8 && i * 7 % -8 == 0)) && i < SIZE + 8)) || !(SIZE <= 50000001) - ProcedureContractResult [Line: 20]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 12]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 RESULT: Ultimate proved your program to be correct! Received shutdown request...