/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/sumt2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 00:30:33,460 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 00:30:33,464 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 00:30:33,520 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 00:30:33,549 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 00:30:33,552 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 00:30:33,554 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 00:30:33,556 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 00:30:33,559 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 00:30:33,561 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 00:30:33,567 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 00:30:33,576 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 00:30:33,577 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 00:30:33,580 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 00:30:33,581 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 00:30:33,584 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 00:30:33,605 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-24 00:30:33,625 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-24 00:30:33,651 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 00:30:33,651 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 00:30:33,656 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 00:30:33,656 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 00:30:33,656 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 00:30:33,656 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 00:30:33,657 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 00:30:33,657 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 00:30:33,657 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 00:30:33,657 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 00:30:33,658 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 00:30:33,659 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 00:30:33,659 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 00:30:33,659 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 00:30:33,660 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 00:30:33,660 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 00:30:33,660 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 00:30:33,660 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 00:30:33,661 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 00:30:33,661 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 00:30:33,661 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 00:30:33,661 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 00:30:33,661 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-24 00:30:34,068 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 00:30:34,098 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 00:30:34,102 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 00:30:34,104 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 00:30:34,105 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 00:30:34,106 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt2.c [2021-02-24 00:30:34,196 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/632bee1ab/8c9a4fd90c8848c798a41d426629f45a/FLAG4eaa0b9fb [2021-02-24 00:30:34,757 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 00:30:34,758 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt2.c [2021-02-24 00:30:34,766 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/632bee1ab/8c9a4fd90c8848c798a41d426629f45a/FLAG4eaa0b9fb [2021-02-24 00:30:35,147 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/632bee1ab/8c9a4fd90c8848c798a41d426629f45a [2021-02-24 00:30:35,150 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 00:30:35,166 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 00:30:35,174 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 00:30:35,175 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 00:30:35,179 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 00:30:35,181 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:30:35" (1/1) ... [2021-02-24 00:30:35,182 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35dd312 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:30:35, skipping insertion in model container [2021-02-24 00:30:35,183 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:30:35" (1/1) ... [2021-02-24 00:30:35,193 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 00:30:35,213 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 00:30:35,453 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt2.c[403,416] [2021-02-24 00:30:35,474 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:30:35,484 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 00:30:35,496 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt2.c[403,416] [2021-02-24 00:30:35,501 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:30:35,517 INFO L208 MainTranslator]: Completed translation [2021-02-24 00:30:35,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:30:35 WrapperNode [2021-02-24 00:30:35,517 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 00:30:35,518 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 00:30:35,519 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 00:30:35,519 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 00:30:35,530 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:30:35" (1/1) ... [2021-02-24 00:30:35,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:30:35" (1/1) ... [2021-02-24 00:30:35,537 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:30:35" (1/1) ... [2021-02-24 00:30:35,538 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:30:35" (1/1) ... [2021-02-24 00:30:35,544 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:30:35" (1/1) ... [2021-02-24 00:30:35,548 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:30:35" (1/1) ... [2021-02-24 00:30:35,550 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:30:35" (1/1) ... [2021-02-24 00:30:35,553 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 00:30:35,554 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 00:30:35,554 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 00:30:35,554 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 00:30:35,555 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:30:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 00:30:35,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 00:30:35,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 00:30:35,642 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 00:30:35,642 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-24 00:30:35,642 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-24 00:30:35,642 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 00:30:35,642 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 00:30:35,642 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 00:30:35,643 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 00:30:35,643 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 00:30:35,643 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-24 00:30:35,643 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-24 00:30:35,643 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-02-24 00:30:35,643 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 00:30:35,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 00:30:35,644 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 00:30:35,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 00:30:35,644 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 00:30:35,644 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 00:30:35,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 00:30:35,911 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 00:30:35,911 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-24 00:30:35,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:30:35 BoogieIcfgContainer [2021-02-24 00:30:35,913 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 00:30:35,915 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 00:30:35,915 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 00:30:35,918 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 00:30:35,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 12:30:35" (1/3) ... [2021-02-24 00:30:35,920 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35029068 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:30:35, skipping insertion in model container [2021-02-24 00:30:35,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:30:35" (2/3) ... [2021-02-24 00:30:35,920 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35029068 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:30:35, skipping insertion in model container [2021-02-24 00:30:35,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:30:35" (3/3) ... [2021-02-24 00:30:35,922 INFO L111 eAbstractionObserver]: Analyzing ICFG sumt2.c [2021-02-24 00:30:35,929 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 00:30:35,935 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 00:30:35,957 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 00:30:35,990 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 00:30:35,990 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 00:30:35,991 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-24 00:30:35,991 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 00:30:35,991 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 00:30:35,991 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 00:30:35,992 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 00:30:35,992 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 00:30:36,011 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2021-02-24 00:30:36,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-24 00:30:36,021 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:30:36,022 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:30:36,023 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:30:36,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:30:36,029 INFO L82 PathProgramCache]: Analyzing trace with hash -320789844, now seen corresponding path program 1 times [2021-02-24 00:30:36,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:30:36,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [249459520] [2021-02-24 00:30:36,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:30:36,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:36,333 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:36,334 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:36,336 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:36,336 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:36,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:30:36,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:36,410 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:36,412 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:36,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:30:36,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [249459520] [2021-02-24 00:30:36,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:30:36,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-24 00:30:36,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972547314] [2021-02-24 00:30:36,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-24 00:30:36,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:30:36,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-24 00:30:36,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 00:30:36,455 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 3 states. [2021-02-24 00:30:36,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:30:36,568 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2021-02-24 00:30:36,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-24 00:30:36,578 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2021-02-24 00:30:36,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:30:36,586 INFO L225 Difference]: With dead ends: 54 [2021-02-24 00:30:36,586 INFO L226 Difference]: Without dead ends: 33 [2021-02-24 00:30:36,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 00:30:36,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-02-24 00:30:36,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-02-24 00:30:36,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-02-24 00:30:36,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-02-24 00:30:36,645 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 28 [2021-02-24 00:30:36,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:30:36,646 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-02-24 00:30:36,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-24 00:30:36,646 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-02-24 00:30:36,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-24 00:30:36,647 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:30:36,647 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:30:36,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 00:30:36,648 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:30:36,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:30:36,649 INFO L82 PathProgramCache]: Analyzing trace with hash -332795617, now seen corresponding path program 1 times [2021-02-24 00:30:36,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:30:36,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1025637764] [2021-02-24 00:30:36,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:30:36,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:36,872 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:36,874 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:36,876 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:36,877 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:30:36,894 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:36,896 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-24 00:30:36,911 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:36,919 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-02-24 00:30:36,949 WARN L141 QuantifierPusher]: treesize reduction 20, result has 69.7 percent of original size [2021-02-24 00:30:36,952 WARN L147 QuantifierPusher]: treesize reduction 20, result has 69.7 percent of original size 46 [2021-02-24 00:30:37,006 WARN L141 QuantifierPusher]: treesize reduction 21, result has 80.6 percent of original size [2021-02-24 00:30:37,014 WARN L147 QuantifierPusher]: treesize reduction 21, result has 80.6 percent of original size 87 [2021-02-24 00:30:37,035 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:37,039 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:30:37,049 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:37,050 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:30:37,062 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:37,065 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:37,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:30:37,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:37,149 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:37,151 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:37,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:30:37,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1025637764] [2021-02-24 00:30:37,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:30:37,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-24 00:30:37,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119623582] [2021-02-24 00:30:37,163 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-24 00:30:37,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:30:37,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-24 00:30:37,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-24 00:30:37,171 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 8 states. [2021-02-24 00:30:37,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:30:37,534 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2021-02-24 00:30:37,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-24 00:30:37,535 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2021-02-24 00:30:37,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:30:37,537 INFO L225 Difference]: With dead ends: 49 [2021-02-24 00:30:37,537 INFO L226 Difference]: Without dead ends: 36 [2021-02-24 00:30:37,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-02-24 00:30:37,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-02-24 00:30:37,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-02-24 00:30:37,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-02-24 00:30:37,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2021-02-24 00:30:37,552 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 28 [2021-02-24 00:30:37,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:30:37,552 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2021-02-24 00:30:37,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-24 00:30:37,553 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2021-02-24 00:30:37,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-24 00:30:37,554 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:30:37,554 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:30:37,555 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 00:30:37,555 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:30:37,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:30:37,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1594262807, now seen corresponding path program 1 times [2021-02-24 00:30:37,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:30:37,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885392309] [2021-02-24 00:30:37,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:30:37,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:37,706 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:37,707 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:37,708 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:37,708 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:30:37,713 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:37,713 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:30:37,721 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:37,722 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-24 00:30:37,733 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:37,734 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-24 00:30:37,755 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:37,756 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-02-24 00:30:37,801 WARN L141 QuantifierPusher]: treesize reduction 4, result has 97.0 percent of original size [2021-02-24 00:30:37,808 WARN L147 QuantifierPusher]: treesize reduction 4, result has 97.0 percent of original size 128 [2021-02-24 00:30:37,940 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2021-02-24 00:30:37,952 WARN L141 QuantifierPusher]: treesize reduction 4, result has 97.0 percent of original size [2021-02-24 00:30:37,958 WARN L147 QuantifierPusher]: treesize reduction 4, result has 97.0 percent of original size 131 [2021-02-24 00:30:38,035 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:38,036 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:30:38,048 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:38,048 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:30:38,061 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:38,062 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:38,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:30:38,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:38,140 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:38,141 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:38,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:30:38,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885392309] [2021-02-24 00:30:38,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:30:38,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-02-24 00:30:38,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120788609] [2021-02-24 00:30:38,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-24 00:30:38,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:30:38,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-24 00:30:38,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-02-24 00:30:38,168 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 12 states. [2021-02-24 00:30:38,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:30:38,700 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2021-02-24 00:30:38,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-24 00:30:38,701 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2021-02-24 00:30:38,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:30:38,707 INFO L225 Difference]: With dead ends: 46 [2021-02-24 00:30:38,707 INFO L226 Difference]: Without dead ends: 41 [2021-02-24 00:30:38,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-02-24 00:30:38,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-02-24 00:30:38,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2021-02-24 00:30:38,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-02-24 00:30:38,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2021-02-24 00:30:38,735 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 32 [2021-02-24 00:30:38,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:30:38,736 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2021-02-24 00:30:38,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-24 00:30:38,736 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2021-02-24 00:30:38,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-24 00:30:38,738 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:30:38,738 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:30:38,739 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-24 00:30:38,739 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:30:38,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:30:38,739 INFO L82 PathProgramCache]: Analyzing trace with hash 688413967, now seen corresponding path program 2 times [2021-02-24 00:30:38,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:30:38,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1714994529] [2021-02-24 00:30:38,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:30:38,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:38,827 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:38,827 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:38,828 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:38,829 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:30:38,833 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size [2021-02-24 00:30:38,834 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size 19 [2021-02-24 00:30:38,854 WARN L141 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-02-24 00:30:38,855 WARN L147 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size 1 [2021-02-24 00:30:38,855 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:38,856 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:38,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:30:38,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:38,891 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:38,892 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:38,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:30:38,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1714994529] [2021-02-24 00:30:38,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:30:38,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-02-24 00:30:38,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002541864] [2021-02-24 00:30:38,896 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-24 00:30:38,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:30:38,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-24 00:30:38,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-24 00:30:38,898 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 5 states. [2021-02-24 00:30:39,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:30:39,050 INFO L93 Difference]: Finished difference Result 51 states and 54 transitions. [2021-02-24 00:30:39,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-24 00:30:39,050 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2021-02-24 00:30:39,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:30:39,051 INFO L225 Difference]: With dead ends: 51 [2021-02-24 00:30:39,052 INFO L226 Difference]: Without dead ends: 41 [2021-02-24 00:30:39,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-24 00:30:39,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-02-24 00:30:39,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2021-02-24 00:30:39,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-02-24 00:30:39,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-02-24 00:30:39,064 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2021-02-24 00:30:39,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:30:39,064 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-02-24 00:30:39,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-24 00:30:39,064 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-02-24 00:30:39,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-24 00:30:39,065 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:30:39,066 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:30:39,066 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-24 00:30:39,066 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:30:39,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:30:39,067 INFO L82 PathProgramCache]: Analyzing trace with hash -10578577, now seen corresponding path program 1 times [2021-02-24 00:30:39,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:30:39,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2138548202] [2021-02-24 00:30:39,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:30:39,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:39,130 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:39,131 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:39,132 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:39,132 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-24 00:30:39,135 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:39,135 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-24 00:30:39,142 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:39,143 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-24 00:30:39,153 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:39,154 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-24 00:30:39,169 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:39,170 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-02-24 00:30:39,177 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:39,178 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-02-24 00:30:39,202 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:39,203 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-24 00:30:39,230 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:39,231 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-24 00:30:39,251 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:39,254 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-02-24 00:30:39,278 WARN L141 QuantifierPusher]: treesize reduction 22, result has 83.8 percent of original size [2021-02-24 00:30:39,282 WARN L147 QuantifierPusher]: treesize reduction 22, result has 83.8 percent of original size 114 [2021-02-24 00:30:39,365 WARN L141 QuantifierPusher]: treesize reduction 22, result has 84.3 percent of original size [2021-02-24 00:30:39,367 WARN L147 QuantifierPusher]: treesize reduction 22, result has 84.3 percent of original size 118 [2021-02-24 00:30:39,436 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:39,437 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:30:39,450 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:39,451 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:30:39,465 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:39,466 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:39,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:30:39,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:39,511 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:39,512 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:39,517 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:30:39,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2138548202] [2021-02-24 00:30:39,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:30:39,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-02-24 00:30:39,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156659854] [2021-02-24 00:30:39,518 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-24 00:30:39,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:30:39,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-24 00:30:39,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-02-24 00:30:39,520 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 14 states. [2021-02-24 00:30:40,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:30:40,246 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2021-02-24 00:30:40,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-24 00:30:40,246 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2021-02-24 00:30:40,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:30:40,248 INFO L225 Difference]: With dead ends: 50 [2021-02-24 00:30:40,248 INFO L226 Difference]: Without dead ends: 45 [2021-02-24 00:30:40,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-02-24 00:30:40,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-02-24 00:30:40,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2021-02-24 00:30:40,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-02-24 00:30:40,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-02-24 00:30:40,262 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 36 [2021-02-24 00:30:40,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:30:40,262 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-02-24 00:30:40,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-02-24 00:30:40,262 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-02-24 00:30:40,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-02-24 00:30:40,263 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:30:40,264 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:30:40,264 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-24 00:30:40,264 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:30:40,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:30:40,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1011842713, now seen corresponding path program 2 times [2021-02-24 00:30:40,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:30:40,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [545634318] [2021-02-24 00:30:40,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:30:40,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:40,339 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-24 00:30:40,340 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-24 00:30:40,354 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:40,355 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-24 00:30:40,360 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:40,360 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-24 00:30:40,369 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:40,370 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-24 00:30:40,381 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:40,381 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-24 00:30:40,396 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:40,397 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-02-24 00:30:40,415 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:40,417 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-02-24 00:30:40,448 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:40,451 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-24 00:30:40,500 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:40,501 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-24 00:30:40,532 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:40,535 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-02-24 00:30:40,579 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:40,580 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-02-24 00:30:40,612 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:40,613 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-02-24 00:30:40,647 WARN L141 QuantifierPusher]: treesize reduction 4, result has 97.1 percent of original size [2021-02-24 00:30:40,650 WARN L147 QuantifierPusher]: treesize reduction 4, result has 97.1 percent of original size 132 [2021-02-24 00:30:40,754 WARN L141 QuantifierPusher]: treesize reduction 4, result has 97.1 percent of original size [2021-02-24 00:30:40,757 WARN L147 QuantifierPusher]: treesize reduction 4, result has 97.1 percent of original size 136 [2021-02-24 00:30:40,843 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:40,844 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:30:40,869 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:40,870 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:30:40,896 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:40,897 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:40,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:30:40,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:40,965 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:40,966 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:40,967 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:40,967 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:30:41,002 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:30:41,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [545634318] [2021-02-24 00:30:41,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:30:41,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-02-24 00:30:41,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448668768] [2021-02-24 00:30:41,004 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-24 00:30:41,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:30:41,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-24 00:30:41,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-02-24 00:30:41,005 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 20 states. [2021-02-24 00:30:42,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:30:42,142 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2021-02-24 00:30:42,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-24 00:30:42,142 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 40 [2021-02-24 00:30:42,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:30:42,149 INFO L225 Difference]: With dead ends: 45 [2021-02-24 00:30:42,151 INFO L226 Difference]: Without dead ends: 0 [2021-02-24 00:30:42,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2021-02-24 00:30:42,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-24 00:30:42,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-24 00:30:42,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-24 00:30:42,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-24 00:30:42,153 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 40 [2021-02-24 00:30:42,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:30:42,154 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-24 00:30:42,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-02-24 00:30:42,154 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-24 00:30:42,154 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-24 00:30:42,154 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-24 00:30:42,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-24 00:30:42,583 WARN L202 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2021-02-24 00:30:42,804 WARN L202 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 45 [2021-02-24 00:30:43,196 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 32 [2021-02-24 00:30:43,371 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 39 [2021-02-24 00:30:43,884 WARN L202 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 50 [2021-02-24 00:30:43,940 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-24 00:30:43,940 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-24 00:30:43,940 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-24 00:30:43,940 INFO L192 CegarLoopUtils]: At program point L3-2(line 3) the Hoare annotation is: true [2021-02-24 00:30:43,940 INFO L192 CegarLoopUtils]: At program point L3-3(line 3) the Hoare annotation is: true [2021-02-24 00:30:43,941 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-24 00:30:43,941 INFO L192 CegarLoopUtils]: At program point L3-4(line 3) the Hoare annotation is: true [2021-02-24 00:30:43,941 INFO L192 CegarLoopUtils]: At program point L-1-1(line -1) the Hoare annotation is: true [2021-02-24 00:30:43,941 INFO L192 CegarLoopUtils]: At program point L3-5(line 3) the Hoare annotation is: true [2021-02-24 00:30:43,941 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: (and (<= 20000001 ~SIZE~0) (<= ~SIZE~0 20000001)) [2021-02-24 00:30:43,941 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= ~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|)) [2021-02-24 00:30:43,942 INFO L192 CegarLoopUtils]: At program point L3(line 3) the Hoare annotation is: true [2021-02-24 00:30:43,942 INFO L192 CegarLoopUtils]: At program point L3-1(line 3) the Hoare annotation is: true [2021-02-24 00:30:43,942 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: (and (<= 20000001 ~SIZE~0) (<= ~SIZE~0 20000001)) [2021-02-24 00:30:43,942 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-02-24 00:30:43,942 INFO L185 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: (and (<= 20000001 ~SIZE~0) (<= ~SIZE~0 20000001)) [2021-02-24 00:30:43,942 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-24 00:30:43,942 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-02-24 00:30:43,942 INFO L189 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 5 7) no Hoare annotation was computed. [2021-02-24 00:30:43,943 INFO L189 CegarLoopUtils]: For program point L6(line 6) no Hoare annotation was computed. [2021-02-24 00:30:43,943 INFO L189 CegarLoopUtils]: For program point L6-1(line 6) no Hoare annotation was computed. [2021-02-24 00:30:43,943 INFO L189 CegarLoopUtils]: For program point L6-3(lines 5 7) no Hoare annotation was computed. [2021-02-24 00:30:43,943 INFO L189 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 5 7) no Hoare annotation was computed. [2021-02-24 00:30:43,943 INFO L192 CegarLoopUtils]: At program point L31(line 31) the Hoare annotation is: true [2021-02-24 00:30:43,943 INFO L185 CegarLoopUtils]: At program point L25(lines 25 28) the Hoare annotation is: (let ((.cse0 (* 4294967296 (div main_~n~0 4294967296)))) (let ((.cse3 (= main_~j~0 0)) (.cse2 (<= main_~n~0 (+ .cse0 20000001)))) (or (let ((.cse1 (+ main_~i~0 main_~j~0))) (and (<= (+ .cse0 main_~l~0 3) (+ main_~i~0 main_~j~0 main_~n~0)) (<= .cse1 main_~l~0) (<= main_~l~0 .cse1) .cse2)) (not (<= ~SIZE~0 20000001)) (and (<= main_~i~0 main_~l~0) (<= 1 main_~l~0) .cse3 (<= (+ (* 4294967296 (div main_~l~0 4294967296)) 1) main_~i~0) (<= (+ .cse0 main_~l~0 2) (+ main_~i~0 main_~n~0)) (<= (div main_~l~0 2) 0) .cse2) (and (= main_~i~0 0) .cse3 (= main_~l~0 0) .cse2 (<= (+ .cse0 1) main_~n~0)) (not (<= 20000001 ~SIZE~0))))) [2021-02-24 00:30:43,944 INFO L192 CegarLoopUtils]: At program point mainEXIT(lines 16 33) the Hoare annotation is: true [2021-02-24 00:30:43,944 INFO L185 CegarLoopUtils]: At program point L25-2(lines 25 28) the Hoare annotation is: (let ((.cse0 (* 4294967296 (div main_~n~0 4294967296))) (.cse6 (+ main_~i~0 main_~j~0)) (.cse5 (+ main_~l~0 1))) (let ((.cse2 (+ main_~i~0 main_~j~0 main_~n~0)) (.cse3 (<= .cse6 .cse5)) (.cse4 (<= .cse5 .cse6)) (.cse1 (<= main_~n~0 (+ .cse0 20000001)))) (or (and (<= (+ .cse0 2) (+ main_~i~0 main_~n~0)) (= main_~j~0 0) (<= (+ (* 4294967296 (div main_~l~0 4294967296)) 1) (+ main_~i~0 main_~l~0)) (= main_~l~0 0) .cse1 (<= main_~i~0 1)) (and (<= (+ .cse0 main_~l~0 4) .cse2) .cse3 .cse4 .cse1) (not (<= ~SIZE~0 20000001)) (not (<= 20000001 ~SIZE~0)) (and (<= main_~l~0 (+ (* 4294967296 (div (+ main_~i~0 main_~j~0 (- 2)) 4294967296)) 20000001)) (<= (+ .cse0 main_~l~0 3) .cse2) .cse3 .cse4 .cse1)))) [2021-02-24 00:30:43,944 INFO L185 CegarLoopUtils]: At program point L21(line 21) the Hoare annotation is: (or (not (<= ~SIZE~0 20000001)) (not (<= 20000001 ~SIZE~0)) (and (= main_~i~0 0) (= main_~l~0 0) (<= main_~n~0 (+ (* 4294967296 (div main_~n~0 4294967296)) 20000001)))) [2021-02-24 00:30:43,945 INFO L185 CegarLoopUtils]: At program point L23-2(lines 23 30) the Hoare annotation is: (let ((.cse5 (* 4294967296 (div main_~n~0 4294967296))) (.cse3 (+ main_~i~0 main_~j~0))) (let ((.cse0 (<= .cse3 main_~l~0)) (.cse1 (<= main_~l~0 .cse3)) (.cse6 (= main_~j~0 0)) (.cse2 (* 4294967296 (div main_~l~0 4294967296))) (.cse4 (<= main_~n~0 (+ .cse5 20000001)))) (or (and .cse0 .cse1 (<= (+ .cse2 2) .cse3) .cse4) (and (<= (+ .cse5 main_~l~0 3) (+ main_~i~0 main_~j~0 main_~n~0)) .cse0 .cse1 .cse4) (and (= main_~i~0 0) .cse6 (= main_~l~0 0) .cse4) (and (<= 1 main_~l~0) .cse6 (<= (+ main_~i~0 main_~j~0 .cse2) (+ (* 4294967296 (div .cse3 4294967296)) main_~l~0)) (<= (+ .cse2 1) main_~i~0) (<= main_~i~0 (+ .cse2 4294967295)) (<= (div main_~l~0 2) 0) .cse4) (not (<= ~SIZE~0 20000001)) (not (<= 20000001 ~SIZE~0))))) [2021-02-24 00:30:43,945 INFO L185 CegarLoopUtils]: At program point L23-3(lines 23 30) the Hoare annotation is: (or (let ((.cse2 (div (+ main_~i~0 main_~j~0) 4294967296)) (.cse3 (div main_~l~0 4294967296))) (let ((.cse1 (* 4294967296 .cse3)) (.cse0 (+ (* 4294967296 .cse2) main_~l~0))) (and (< .cse0 (+ main_~i~0 main_~j~0 .cse1 1)) (< .cse2 (+ .cse3 1)) (<= (+ main_~i~0 main_~j~0 .cse1) .cse0)))) (not (<= ~SIZE~0 20000001)) (not (<= 20000001 ~SIZE~0))) [2021-02-24 00:30:43,945 INFO L185 CegarLoopUtils]: At program point L19(line 19) the Hoare annotation is: (or (= main_~l~0 0) (not (<= ~SIZE~0 20000001)) (not (<= 20000001 ~SIZE~0))) [2021-02-24 00:30:43,945 INFO L192 CegarLoopUtils]: At program point L19-1(line 19) the Hoare annotation is: true [2021-02-24 00:30:43,945 INFO L192 CegarLoopUtils]: At program point L17(line 17) the Hoare annotation is: true [2021-02-24 00:30:43,945 INFO L192 CegarLoopUtils]: At program point L17-1(line 17) the Hoare annotation is: true [2021-02-24 00:30:43,945 INFO L192 CegarLoopUtils]: At program point L17-2(line 17) the Hoare annotation is: true [2021-02-24 00:30:43,946 INFO L192 CegarLoopUtils]: At program point mainFINAL(lines 16 33) the Hoare annotation is: true [2021-02-24 00:30:43,946 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 16 33) the Hoare annotation is: true [2021-02-24 00:30:43,946 INFO L185 CegarLoopUtils]: At program point L28(line 28) the Hoare annotation is: (let ((.cse0 (* 4294967296 (div main_~n~0 4294967296)))) (let ((.cse1 (<= main_~n~0 (+ .cse0 20000001)))) (or (and (<= main_~i~0 main_~l~0) (<= main_~l~0 main_~i~0) (<= main_~l~0 (+ (* 4294967296 (div (+ main_~i~0 (- 1)) 4294967296)) 20000001)) (= main_~j~0 0) (<= (+ .cse0 main_~l~0 2) (+ main_~i~0 main_~n~0)) .cse1) (let ((.cse2 (+ main_~i~0 main_~j~0))) (and (<= (+ .cse0 main_~l~0 3) (+ main_~i~0 main_~j~0 main_~n~0)) (<= .cse2 main_~l~0) (<= main_~l~0 .cse2) .cse1)) (not (<= ~SIZE~0 20000001)) (not (<= 20000001 ~SIZE~0))))) [2021-02-24 00:30:43,946 INFO L185 CegarLoopUtils]: At program point L26(line 26) the Hoare annotation is: (let ((.cse0 (* 4294967296 (div main_~n~0 4294967296)))) (let ((.cse2 (<= main_~n~0 (+ .cse0 20000001)))) (or (let ((.cse1 (+ main_~i~0 main_~j~0))) (and (<= (+ .cse0 main_~l~0 3) (+ main_~i~0 main_~j~0 main_~n~0)) (<= .cse1 main_~l~0) (<= main_~l~0 .cse1) .cse2)) (not (<= ~SIZE~0 20000001)) (and (= main_~i~0 0) (= main_~j~0 0) (= main_~l~0 0) .cse2 (<= (+ .cse0 1) main_~n~0)) (not (<= 20000001 ~SIZE~0))))) [2021-02-24 00:30:43,946 INFO L185 CegarLoopUtils]: At program point L22(line 22) the Hoare annotation is: (or (and (= main_~i~0 0) (= main_~j~0 0) (= main_~l~0 0) (<= main_~n~0 (+ (* 4294967296 (div main_~n~0 4294967296)) 20000001))) (not (<= ~SIZE~0 20000001)) (not (<= 20000001 ~SIZE~0))) [2021-02-24 00:30:43,946 INFO L185 CegarLoopUtils]: At program point L20(line 20) the Hoare annotation is: (or (not (<= ~SIZE~0 20000001)) (and (= main_~l~0 0) (<= main_~n~0 (+ (* 4294967296 (div main_~n~0 4294967296)) 20000001))) (not (<= 20000001 ~SIZE~0))) [2021-02-24 00:30:43,947 INFO L185 CegarLoopUtils]: At program point L18(line 18) the Hoare annotation is: (or (= main_~l~0 0) (not (<= ~SIZE~0 20000001)) (not (<= 20000001 ~SIZE~0))) [2021-02-24 00:30:43,947 INFO L185 CegarLoopUtils]: At program point L18-1(line 18) the Hoare annotation is: (or (= main_~l~0 0) (not (<= ~SIZE~0 20000001)) (not (<= 20000001 ~SIZE~0))) [2021-02-24 00:30:43,947 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 8 13) the Hoare annotation is: true [2021-02-24 00:30:43,947 INFO L185 CegarLoopUtils]: At program point L10(line 10) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-24 00:30:43,947 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertEXIT(lines 8 13) the Hoare annotation is: true [2021-02-24 00:30:43,947 INFO L185 CegarLoopUtils]: At program point L9(lines 9 11) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-02-24 00:30:43,947 INFO L185 CegarLoopUtils]: At program point L10-1(line 10) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-24 00:30:43,948 INFO L192 CegarLoopUtils]: At program point L9-2(lines 8 13) the Hoare annotation is: true [2021-02-24 00:30:43,948 INFO L185 CegarLoopUtils]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 10) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-24 00:30:43,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 12:30:43 BoogieIcfgContainer [2021-02-24 00:30:43,971 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 00:30:43,973 INFO L168 Benchmark]: Toolchain (without parser) took 8819.62 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 127.8 MB in the beginning and 181.2 MB in the end (delta: -53.3 MB). Peak memory consumption was 120.1 MB. Max. memory is 8.0 GB. [2021-02-24 00:30:43,973 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 151.0 MB. Free memory is still 125.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 00:30:43,974 INFO L168 Benchmark]: CACSL2BoogieTranslator took 343.24 ms. Allocated memory is still 151.0 MB. Free memory was 126.8 MB in the beginning and 117.2 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-24 00:30:43,975 INFO L168 Benchmark]: Boogie Preprocessor took 34.62 ms. Allocated memory is still 151.0 MB. Free memory was 117.2 MB in the beginning and 115.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-24 00:30:43,975 INFO L168 Benchmark]: RCFGBuilder took 359.37 ms. Allocated memory is still 151.0 MB. Free memory was 115.8 MB in the beginning and 133.3 MB in the end (delta: -17.5 MB). Peak memory consumption was 18.6 MB. Max. memory is 8.0 GB. [2021-02-24 00:30:43,976 INFO L168 Benchmark]: TraceAbstraction took 8056.62 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 132.8 MB in the beginning and 181.2 MB in the end (delta: -48.4 MB). Peak memory consumption was 124.6 MB. Max. memory is 8.0 GB. [2021-02-24 00:30:43,978 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 151.0 MB. Free memory is still 125.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 343.24 ms. Allocated memory is still 151.0 MB. Free memory was 126.8 MB in the beginning and 117.2 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.62 ms. Allocated memory is still 151.0 MB. Free memory was 117.2 MB in the beginning and 115.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 359.37 ms. Allocated memory is still 151.0 MB. Free memory was 115.8 MB in the beginning and 133.3 MB in the end (delta: -17.5 MB). Peak memory consumption was 18.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 8056.62 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 132.8 MB in the beginning and 181.2 MB in the end (delta: -48.4 MB). Peak memory consumption was 124.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 10]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: (((((((i + j <= l && l <= i + j) && 4294967296 * (l / 4294967296) + 2 <= i + j) && n <= 4294967296 * (n / 4294967296) + 20000001) || (((4294967296 * (n / 4294967296) + l + 3 <= i + j + n && i + j <= l) && l <= i + j) && n <= 4294967296 * (n / 4294967296) + 20000001)) || (((i == 0 && j == 0) && l == 0) && n <= 4294967296 * (n / 4294967296) + 20000001)) || ((((((1 <= l && j == 0) && i + j + 4294967296 * (l / 4294967296) <= 4294967296 * ((i + j) / 4294967296) + l) && 4294967296 * (l / 4294967296) + 1 <= i) && i <= 4294967296 * (l / 4294967296) + 4294967295) && l / 2 <= 0) && n <= 4294967296 * (n / 4294967296) + 20000001)) || !(SIZE <= 20000001)) || !(20000001 <= SIZE) - ProcedureContractResult [Line: 16]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 8]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 50 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.1s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 3.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 170 SDtfs, 281 SDslu, 410 SDs, 0 SdLazy, 697 SolverSat, 78 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 112 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 3.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 9 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 42 LocationsWithAnnotation, 84 PreInvPairs, 122 NumberOfFragments, 817 HoareAnnotationTreeSize, 84 FomulaSimplifications, 4434 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 42 FomulaSimplificationsInter, 1899 FormulaSimplificationTreeSizeReductionInter, 1.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 200 NumberOfCodeBlocks, 200 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 194 ConstructedInterpolants, 0 QuantifiedInterpolants, 48118 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 4/25 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...